| 单词 | intercrossed |
| 例句 | Between these extremes there lie relations infinite in variety and impossible to grade, so crossed and intercrossed are they with other elements. The Color Line A Brief in Behalf of the Unborn 2011-01-30T03:00:15.907Z Species of Masdevallia, Odontoglossum, Lycaste, Phaius, and Zygopetalum have all been intercrossed, and the number of possible combinations admits of incalculable development, especially as the crossing is not confined to the same genus. Orchids It was an intangible but impenetrable mesh of interests and influences that extended in every direction and crossed and intercrossed so that no man could tell where it ended. The Shepherd of the North The good work was resumed, however, after the downfall of Napoleon, and in 1830 Germany was intercrossed by from three to four thousand miles of turnpike. The Railroad Question A historical and practical treatise on railroads, and remedies for their abuses Pallas, on the influence of domestication upon the sterility of intercrossed species, i. The Variation of Animals and Plants Under Domestication, Volume II (of 2) These hybrids have therefore been intercrossed among themselves this year, chiefly for the benefit of the Italian people. Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950 Therefore, some of the best early crosses have been repeated, new parent trees are being tried and selected hybrids intercrossed. Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952 In the chapel of the château, a miniature cathedral with arches intercrossed and a wainscot of oak mounting as high as the walls, all the hangings have been arranged, all the candles lit. In the Yule-Log Glow, Book I Christmas Tales from 'Round the World Giant aisles intercrossed their heights above him; myriads of mighty pillars, fantastically carven, filed away to invisibility behind the yellow illumination of torch-fires. Some Chinese Ghosts He hid his canoe in the bushes and strode rapidly across the islet, pushing with impatience through the twigs of heavy undergrowth intercrossed over his path. Almayer's Folly: a story of an Eastern river I intercrossed my plants artificially, and pollinated more than a thousand flowers. Species and Varieties, Their Origin by Mutation Selected individuals of this hybrid were intercrossed, and some crossing with the native chestnut was done. Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952 As this takes place, the margins gradually become a little everted, so that the spikes, which at first intercrossed, at last project in two parallel rows. Insectivorous Plants In sixteen out of these nineteen pairs, the Colchester-crossed plant exceeded in height its intercrossed opponent. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The cowslip and primrose, when intercrossed, behave like distinct species, for they are far from being mutually fertile. The Different Forms of Flowers on Plants of the Same Species It may be justifiable to assume that all the individuals of one locality are ordinarily intercrossed, and are moreover subjected to the same external conditions. Species and Varieties, Their Origin by Mutation The offspring of the former, although variously intercrossed, would either inherit the peculiarities of their fathers or transmit an increased tendency to vary in the same manner. The Descent of Man The ordinary and open flowers can be intercrossed; and the benefits which certainly are derived from this process are thus secured. The Origin of Species by means of Natural Selection, 6th Edition Therefore the Chelsea-crossed are to the intercrossed in height as 100 to 56; the Chelsea-crossed to the self-fertilised as 100 to 52; and the intercrossed to the self-fertilised as 100 to 92. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Now Mr. Scott shows in several cases that the same law holds good when two heterostyled species of Primula are intercrossed, or when one is crossed with a homostyled species. The Different Forms of Flowers on Plants of the Same Species Flowers on the plants of the ninth intercrossed generation were fertilised with pollen taken from a fresh stock, and seedlings thus raised. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Other flowers on the same intercrossed plants were fertilised with pollen from another intercrossed plant, producing seedlings of the tenth intercrossed generation. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The view commonly entertained by naturalists is that species, when intercrossed, have been specially endowed with sterility, in order to prevent their confusion. The Origin of Species by means of Natural Selection, 6th Edition With respect to fertility, the twenty-eight Chelsea-crossed plants produced 272 capsules; the twenty-seven intercrossed plants produced 24; and the seventeen self-fertilised plants 17 capsules. Effects of Cross and Self Fertilisation in the Vegetable Kingdom But the results are much more complicated than with ordinary plants, as two heterostyled dimorphic species can be intercrossed in eight different ways. The Different Forms of Flowers on Plants of the Same Species During the three first generations the intercrossed plants taken together exceeded in height the self-fertilised taken together, in the ratio of 100 to 65, and in fertility in a still higher degree. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Thus in the seventh generation the intercrossed plants were to the self-fertilised in height as 100 to 137. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Two plants of this variety of Mimulus, belonging to the sixth self-fertilised generation, and growing in separate pots, were intercrossed; and some flowers on the same plants were again self-fertilised. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The plants of these two latter lots flowered at the same time, though the Chelsea-crossed grew so much taller and more vigorously than the intercrossed. Effects of Cross and Self Fertilisation in the Vegetable Kingdom These seedlings were legitimately intercrossed, and from their seed fifteen plants were raised, grandchildren of the first illegitimate union, and to my surprise all proved short-styled. The Different Forms of Flowers on Plants of the Same Species But this cross did not do the least good, the intercrossed plants being inferior in height to the self-fertilised, in the ratio of 100 to 110. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed plants thus have at least one important advantage over the self-fertilised. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The individual plants differ in constitution, so that the descendants of some profit by their parents having been intercrossed, whilst others do not. Effects of Cross and Self Fertilisation in the Vegetable Kingdom In the second trial, the intercrossed plants were more fertile than the self-fertilised in the ratio of 100 to 73, and taller in the ratio of 100 to 92. Effects of Cross and Self Fertilisation in the Vegetable Kingdom We can believe this the less because with some plants, for instance, Amsinckia spectabilis, the pistil varies greatly in length without affecting the fertility of the individuals which are intercrossed. The Different Forms of Flowers on Plants of the Same Species The offspring of plants of the eighth self-fertilised generation of Mimulus crossed by a fresh stock, survived a frost which killed every single self-fertilised and intercrossed plant of the same old stock. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The self-fertilised plants of Petunia completed their growth and began to wither sooner than did the intercrossed plants; and these latter considerably before the offspring from a cross with a fresh stock. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Plants derived from a cross with a fresh stock as well as the intercrossed plants of the old stock, flowered before the self-fertilised plants in nine out of the ten pots. Effects of Cross and Self Fertilisation in the Vegetable Kingdom We thus see that in weight, as in height, the self-fertilised plants had a decided advantage over the English-crossed and intercrossed plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Plants derived from a cross with a fresh stock, and the intercrossed plants of the old stock, both flowered before the self-fertilised in nine out of the ten pots. Effects of Cross and Self Fertilisation in the Vegetable Kingdom In eight pots, in which the plants did not grow much crowded, the flower-stems on sixteen intercrossed plants were in height to those on sixteen self-fertilised plants, as 100 to 94. Effects of Cross and Self Fertilisation in the Vegetable Kingdom In the two other pots on which the plants grew much crowded, the flower-stems on nine intercrossed plants were in height to those on nine self-fertilised plants, as 100 to 90. Effects of Cross and Self Fertilisation in the Vegetable Kingdom That the intercrossed plants in these two latter pots had a real advantage over their self-fertilised opponents, was well shown by their relative weights when cut down, which was as 100 to 78. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The three closely adjoining rows of plants growing in the open ground flowered profusely, and the flowers were incessantly visited by bees, and certainly thus intercrossed. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The mean height of the flower-stems on the twenty-five intercrossed plants in the ten pots taken together, was to that of the flower-stems on the twenty-five self-fertilised plants, as 100 to 92. Effects of Cross and Self Fertilisation in the Vegetable Kingdom So that the self-fertilised plants were a little taller than the intercrossed; and in eight out of the ten pots a self-fertilised plant flowered before any one of the crossed plants in the same pots. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Moreover, in seven out of the eight pots a self-fertilised plant flowered before any of the intercrossed plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom So that here again the self-fertilised exhibit a slight superiority over the intercrossed plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Plants of English-crossed and intercrossed parentage, as 100 to 45 seeds. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Indeed, in two of the cases the self-fertilised plants were superior to such intercrossed plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom A tall variety, bearing large, almost white flowers blotched with crimson, appeared amongst the intercrossed and self-fertilised plants of the third and fourth generations. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed plants of the third generation likewise produced flowers almost, though not quite so uniform in tint as those of the self-fertilised plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Iberis umbellata—plants left uncovered in greenhouse; intercrossed plants of the 3rd generation, compared with self-fertilised plants of the 3rd generation, yielded seeds, in number: 75. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The English-crossed plants, though so superior in productiveness, were, as we have seen, decidedly inferior in height and weight to the self-fertilised, and only equal to, or hardly superior to, the intercrossed plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Eschscholtzia californica—Brazilian stock; plants left uncovered and cross-fertilised by bees; capsules on intercrossed plants of the 2nd generation, compared with capsules on self-fertilised plants of 2nd generation, contained seeds, in number: 78. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Dianthus caryophyllus—plants spontaneously self-fertilised under a net; capsules on intercrossed and self-fertilised plants of the 3rd generation contained seeds in number: 125. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Petunia violacea—left uncovered and cross-fertilised by insects: plants of the 5th intercrossed and self-fertilised generations produced seeds, as judged by the weight of an equal number of capsules: 86. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Eschscholtzia californica—the intercrossed and self-fertilised plants belong to the 2nd generation: 100 : 45 : 40. Effects of Cross and Self Fertilisation in the Vegetable Kingdom As no variability of this kind can be detected in plants raised from seeds, the parents of which have grown during many successive generations in close proximity, we may infer that they cannot have intercrossed. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Dianthus caryophyllus—the intercrossed plants are derived from self-fertilised of the 3rd generation, crossed by intercrossed plants of the 3rd generation. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Petunia violacea—the intercrossed and self-fertilised plants belong to the 5th generation: 100 : 54 : 46. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Table 9/E further shows us that in all four cases the intercrossed plants of the same stock still have a decided though small advantage in fertility over the self-fertilised plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom In the seventh and eighth generation of Ipomoea, the anthers in the flowers of the self-fertilised plants were plainly smaller than those in the flowers of the intercrossed plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The plants raised from these seeds may be called the INTERCROSSED; and these form the fifth intercrossed generation. Effects of Cross and Self Fertilisation in the Vegetable Kingdom In the fourth generation of Petunia, the pollen produced by the self-fertilised and intercrossed plants was compared, and they were far more empty and shrivelled grains in the former. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Plants thus circumstanced will commonly have been intercrossed by insects; so that the seedlings which were first experimented on will generally have been the product of a cross. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Dianthus caryophyllus—flowers on self-fertilised plants of the 3rd generation crossed by intercrossed plants, and other flowers again self-fertilised yielded seeds as: 97. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Firstly, in the third and fourth generations of Mimulus luteus, a tall variety, often alluded to, having large white flowers blotched with crimson, appeared amongst both the intercrossed and self-fertilised plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom These latter plants and the intercrossed are comparable in all respects with the crossed and self-fertilised plants of the four previous generations. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The self-fertilised plants belonging to this variety were not only taller, but more fertile than the intercrossed plants; though these latter in the earlier generations were much taller and more fertile than the self-fertilised plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Thus in the fifth generation the self-fertilised plants were to the intercrossed in height as 126 to 100. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Secondly, in the sixth self-fertilised generation of Ipomoea a single plant named the Hero appeared, which exceeded by a little in height its intercrossed opponent,—a case which had not occurred in any previous generation. Effects of Cross and Self Fertilisation in the Vegetable Kingdom In order that distinct plants should be intercrossed, it is of course indispensable that two or more individuals should grow near one another; and this is generally the case. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Seeds from the Westerham-crossed capsules to those from the capsules of the fifth intercrossed generation, in weight as 100 to 66. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The degree to which distinct plants will thus be intercrossed depends on the number of spikes in full flower at the same time on the same plant. Effects of Cross and Self Fertilisation in the Vegetable Kingdom For instance, with Ipomoea purpurea every single intercrossed plant exceeded in height its self-fertilised opponent until the sixth generation; and so it was with Mimulus luteus until the fourth generation. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Such cases are, however, intelligible, as almost all plants require to be occasionally intercrossed; and if any entomiphilous species ceased to be visited by insects, it would probably perish unless it were rendered anemophilous. Effects of Cross and Self Fertilisation in the Vegetable Kingdom A cross with a fresh stock or with another variety seems to be always highly beneficial, whether or not the mother-plants have been intercrossed or self-fertilised for several previous generations. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Seeds from the intercrossed capsules to those from the self-fertilised capsules, in weight as 100 to 72. Effects of Cross and Self Fertilisation in the Vegetable Kingdom These intercrossed plants tended also in a few cases to become somewhat more uniform in some of their external characters than they were at first. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The seedlings thus raised formed the tenth intercrossed generation, and I will call them the "INTERCROSSED PLANTS." Effects of Cross and Self Fertilisation in the Vegetable Kingdom The capsules produced by this cross contained, to my surprise, fewer and lighter seeds than did the capsules of the intercrossed plants; but this, I think, must have been accidental. Effects of Cross and Self Fertilisation in the Vegetable Kingdom I should state that two of the Colchester-crossed plants in Pot 4, when about two-thirds grown, became much diseased, and were, together with their intercrossed opponents, rejected. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed plants in height to the self-fertilised as 100 to 61. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Several flowers on Hero were therefore fertilised with their own pollen, and the seedlings thus raised were put into competition with self-fertilised and intercrossed plants of the corresponding generation. Effects of Cross and Self Fertilisation in the Vegetable Kingdom In the bottom line the mean height of the seventy-three intercrossed plants is shown to be 85.84 inches, and that of the seventy-three self-fertilised plants 66.02 inches, or as 100 to 77. Effects of Cross and Self Fertilisation in the Vegetable Kingdom We thus see how immensely superior in height the Chelsea-crossed are to the intercrossed and to the self-fertilised plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Weight of seeds produced by the same number of intercrossed and self-fertilised plants as 100 to 73. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The Westerham-crossed plants in weight to the intercrossed as 100 to 101. Effects of Cross and Self Fertilisation in the Vegetable Kingdom In the first trial the intercrossed plants were less fertile than the self-fertilised, and less tall in the ratio of 100 to 110. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Other plants in pots in the greenhouse were left uncovered, and as I saw small flies visiting the flowers, it seemed probable that they would be intercrossed. Effects of Cross and Self Fertilisation in the Vegetable Kingdom As far as the above averages can be trusted from so few capsules, the English-crossed capsules contained twice as many seeds as the intercrossed, and rather more than twice as many as the self-fertilised capsules. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Of the forty-five from the English-crossed plants, four were empty; of those from the intercrossed, five were empty; and of those from the self-fertilised, nine were empty. Effects of Cross and Self Fertilisation in the Vegetable Kingdom These three lots of plants were also weighed; the Westerham-crossed plants weighed 28 ounces; the intercrossed plants, 41 ounces; and the self-fertilised, 14.75 ounces. Effects of Cross and Self Fertilisation in the Vegetable Kingdom By the intercrossed and self-fertilised plants, as 100 to 78. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Plants of intercrossed and self-fertilised parentage, as 100 to 89 seeds. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The pots were left uncovered in the greenhouse, but whether the flowers were intercrossed by bees or self-fertilised I do not know. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Many of the London-crossed germinated before the others, and were rejected; and many of the intercrossed later than those of the other two lots. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed plants in weight to the self-fertilised as 100 to 36. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The average height of the sixteen London-crossed plants in Table 4/47 is 32.82 inches; that of the fifteen intercrossed plants, 28 inches; and that of the ten self-fertilised plants, 26.55. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed to the self-fertilised as 100 to 95. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed to the self-fertilised as 100 to 67. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed to the self-fertilised as 100 to 73. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Their leaves were of a brighter green than those of the intercrossed and self-fertilised plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The flowers of the intercrossed plants of the fourth generation were likewise nearly uniform in colour. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Ten intercrossed capsules would have contained 4.14 grains weight of seed. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed plants in height to the self-fertilised as 100 to 77. Effects of Cross and Self Fertilisation in the Vegetable Kingdom On the other hand, the Westerham-crossed plants are exceeded in height by the intercrossed; and this is a surprising fact, judging from most of the other strictly analogous cases. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The flowers on the intercrossed plants were mostly of the same tint, but not nearly so uniform as those on the self-fertilised plants, and many of them were pale, approaching almost to white. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The Westerham-crossed plants had also leaves of a darker green, and looked altogether more vigorous than the intercrossed; and what is much more important, they produced, as we shall presently see, much heavier seed-capsules. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The twenty-one Westerham-crossed plants weighed 32 ounces; the twenty-two intercrossed plants, 34 ounces, and the twenty-one self-fertilised plants 7 1/4 ounces. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed plants in weight to the self-fertilised as 100 to 22.3. Effects of Cross and Self Fertilisation in the Vegetable Kingdom We here see, judging by weight instead of as before by height, that the Westerham-crossed and the intercrossed have an immense advantage over the self-fertilised. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The self-fertilised plants were also remarkably uniform in height, as judged by the eye; the intercrossed less so, whilst the Westerham-crossed plants varied much in height. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed plants in height to the self-fertilised as 100 to 61. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The Westerham-crossed plants were also much taller and heavier plants than the self-fertilised, both in the pots and open ground; but they were less tall and heavy than the intercrossed plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Several plants were raised in the greenhouse close together, and their flowers were mutually intercrossed. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Column 4: Number of the plants from self-fertilised or intercrossed parents of the same stock. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The effects of crossing a self-fertilised plant either by another self-fertilised plant or by an intercrossed plant of the old stock. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Ipomoea purpurea—offspring of plants intercrossed for nine generations and then crossed by a fresh stock, compared with plants of the tenth intercrossed generation: 19 : 84.03 : 19 : 65.78 : 78. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Ipomoea purpurea—offspring of plants intercrossed for nine generations and then crossed by a fresh stock, compared with plants of the tenth intercrossed generation, in fertility: .. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Eschscholtzia californica—offspring of a Brazilian stock crossed by an English stock, compared with plants of the Brazilian stock of the second intercrossed generation, in weight: .. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Eschscholtzia californica—offspring of a Brazilian stock crossed by an English stock, compared with plants of the Brazilian stock of the second intercrossed generation, in fertility: .. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Dianthus caryophyllus—offspring from plants of the third self-fertilised generation crossed by intercrossed plants of the third generation, compared with plants of fourth self-fertilised generation: 15 : 28.00 : 10 : 26.55 : 95. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Pisum sativum—offspring from a cross between two closely allied varieties, compared with the self-fertilised offspring of one of the varieties, or with intercrossed plants of the same stock: ? Effects of Cross and Self Fertilisation in the Vegetable Kingdom Petunia violacea—offspring of plants self-fertilised for four generations and then crossed by a fresh stock, compared with plants of the fifth intercrossed generation, in weight: .. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Petunia violacea—offspring of plants self-fertilised for four generations and then crossed by a fresh stock, compared with plants of the fifth intercrossed generation, grown in open ground, in weight: .. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Petunia violacea—offspring of plants self-fertilised for four generations and then crossed by a fresh stock, compared with plants of the fifth intercrossed generation, grown in open ground, in fertility: .. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Eschscholtzia californica—offspring of a Brazilian stock crossed by an English stock, compared with plants of the Brazilian stock of the second intercrossed generation, in height: 19 : 45.92 : 18 : 43.38 : 94. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Some exotic plants are not frequented by the native insects in their new home, and therefore are not intercrossed; and this appears to be a highly important factor in the individuals acquiring uniformity of constitution. Effects of Cross and Self Fertilisation in the Vegetable Kingdom These intercrossed plants thus became in the later generations more or less closely inter-related. Effects of Cross and Self Fertilisation in the Vegetable Kingdom These consequently exceeded the intercrossed plants considerably in height. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The intercrossed plants of the same stock in four out of the five successive generations plainly exceeded in height the self-fertilised plants. Effects of Cross and Self Fertilisation in the Vegetable Kingdom Plants growing in the same pots, and subjected in each generation to the same conditions, were intercrossed for nine consecutive generations. Effects of Cross and Self Fertilisation in the Vegetable Kingdom |
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