英语词汇“Oenothera”造句的方法、技巧、例句及翻译-英语例句辞典

Indeed, if you coupled the genesis of spontaneous mutants—the giant-leaved Oenothera, say—with natural selection, then Darwin’s relentless engine was automatically set in motion. The Gene 2016-06-02T00:00:00Z

Over the next years, as the vigorous Oenothera multiplied, de Vries found that eight hundred new variants had spontaneously arisen—plants with gigantic leaves, with hairy stems, or with odd-shaped flowers. The Gene 2016-06-02T00:00:00Z

Oenothera.—The genus of the Evening Primrose, consisting of showy species, all of which grow and blossom freely in rich deep soils. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" 2012-03-04T03:00:13.390Z

Stem and foliage glabrous, or with sparse spreading hairs Evening Primrose, Oenothera biennis. 7b. The Plants of Michigan Simple Keys for the Identification of the Native Seed Plants of the State

An evening primrose, Oenothera tetraptera, has white flowers in its first stage, and red ones at a later period of development. Library of the World's Best Literature, Ancient and Modern — Volume 1

Evening Primrose; Night Willow-herb Oenothera biennis Flowers—Yellow, fragrant, opening at evening, 1 to 2 in. across, borne in terminal leafy-bracted spikes. Wild Flowers Worth Knowing

The occurrence of mutations in Oenothera was first noticed by De Vries, the Dutch botanist, in the neighbourhood of Amsterdam in 1886. Hormones and Heredity

In the first place I will describe a hybrid between two species of Oenothera, which I made some years ago. Species and Varieties, Their Origin by Mutation

The petals of this beautiful and fragrant shrub, as well as of the Oenothera, tree primrose, and others, continue expanded but a few hours, falling off about noon, or soon after, in hot weather. The Botanic Garden. Part II. Containing the Loves of the Plants. a Poem. With Philosophical Notes.

In a flower-garden containing some plants of Oenothera, the pollen of which can easily be recognised, I found not only single grains but masses of it within many flowers of Mimulus, Digitalis, Antirrhinum, and Linaria. Effects of Cross and Self Fertilisation in the Vegetable Kingdom

MacDougal also obtained a more or less distinct mutant of Oenothera biennis. Darwin and Modern Science

In this respect mutations as observed in Oenothera seem to be in striking contrast to the majority of Mendelian characters. Hormones and Heredity

From the breeder's point of view our hybrid Oenothera would be a distinct gain, were it not for the difficulty of its propagation. Species and Varieties, Their Origin by Mutation

Nor seem these two types to exhaust the range of variability of Oenothera cruciata. Species and Varieties, Their Origin by Mutation

Among them are some of its near allies, the common and the small flowered evening-primrose, or Oenothera biennis and O. muricata. Species and Varieties, Their Origin by Mutation

The external causes of this curious period of mutability are as yet wholly unknown and can hardly be guessed at, since the origin of the Oenothera Lamarckiana is veiled in mystery. Darwin and Modern Science

It seems probable that mutations are of different kinds, as exemplified in Oenothera by gigas and rubricalyx respectively, the former producing only sterile hybrids, the latter behaving exactly like a Mendelian unit. Hormones and Heredity

In the case of Oenothera muricata x biennis the differentiating units reduce the fertility to a low degree, threatening the offspring with almost complete infertility and extinction. Species and Varieties, Their Origin by Mutation

Its immediate predecessor must have been the subgenus Onagra, which is considered by some authors as consisting of a single systematic species, Oenothera biennis. Species and Varieties, Their Origin by Mutation

Oenothera biennis was introduced about 1614 from Virginia, or nearly three centuries ago. Species and Varieties, Their Origin by Mutation

Oenothera gigas, for example, has stouter stems and denser foliage; the leaves are larger and broader; its thick flower-buds produce gigantic flowers, but only small fruits with large seeds. Darwin and Modern Science

It must be explained that the young plant of Oenothera has practically no stem, but a number of leaves radiating in all directions from the growing point which is near the surface of the soil. Hormones and Heredity

Only one or two exceptions could be quoted, as for instance the Oenothera brevistylis, which in its crosses always behaves as a pure retrogressive variety. Species and Varieties, Their Origin by Mutation

The blade shows numbers of convexities on either surface, the whole surface being undulated in this manner; it lacks also the brightness of the ordinary evening-primrose or Oenothera biennis. Species and Varieties, Their Origin by Mutation

It is the Oenothera elliptica, with narrow elliptical leaves and also with elliptical petals. Species and Varieties, Their Origin by Mutation

New points of view in regard to these lines of inquiry have been adopted by H. de Vries who has succeeded in obtaining from Oenothera Lamarckiana a number of constant "elementary" species. Darwin and Modern Science

The Mendelians, when the mutations of Oenothera were first described, endeavoured to show that they were merely examples of the segregation of factors from a heterozygous combination. Hormones and Heredity

I have crossed another elementary species, the Oenothera hirtella with some of my new and with some older Linnean species, and got several constant hybrid races. Species and Varieties, Their Origin by Mutation

One has been already alluded to; it pertains to the common evening-primrose or Oenothera biennis, and one is a species belonging to another genus of the same family, the great hairy willow-herb or _Epilobium hirsutum. Species and Varieties, Their Origin by Mutation

In Oenothera the main stem is prolonged upwards beyond the fan; in the others the main stem is lacking or at least undiscernable, but this feature manifestly is only of secondary importance. Species and Varieties, Their Origin by Mutation

The European types of Oenothera biennis and O. muricata are in the same condition. Darwin and Modern Science

Since that time, however, the natural distribution and the cultural history of Oenothera has been very thoroughly worked out. Hormones and Heredity

In unbalanced crosses of the genus Oenothera the hybrids of such reciprocal unions are often different, as we have previously shown. Species and Varieties, Their Origin by Mutation

But it is manifest that the original production of the characters of Oenothera gigas was a phenomenon of far greater importance than the subsequent accidental transition of this quality into the active state. Species and Varieties, Their Origin by Mutation

For manifestly the species of the large genus of Oenothera are grouped in swarms, the youngest or most recent of which we have under observation. Species and Varieties, Their Origin by Mutation

Such is the case with the mutative origin of Xanthium commune Wootoni from New Mexico and of Oenothera biennis cruciata from Holland. Species and Varieties, Their Origin by Mutation

Drosophila in the hands of Professor Morgan and his students and colleagues has thus become as classical a type as Oenothera in those of the botanical mutationists. Hormones and Heredity

单词	Oenothera
例句	Oenothera Indeed, if you coupled the genesis of spontaneous mutants—the giant-leaved Oenothera, say—with natural selection, then Darwin’s relentless engine was automatically set in motion. The Gene 2016-06-02T00:00:00Z Over the next years, as the vigorous Oenothera multiplied, de Vries found that eight hundred new variants had spontaneously arisen—plants with gigantic leaves, with hairy stems, or with odd-shaped flowers. The Gene 2016-06-02T00:00:00Z Oenothera.—The genus of the Evening Primrose, consisting of showy species, all of which grow and blossom freely in rich deep soils. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" 2012-03-04T03:00:13.390Z Stem and foliage glabrous, or with sparse spreading hairs Evening Primrose, Oenothera biennis. 7b. The Plants of Michigan Simple Keys for the Identification of the Native Seed Plants of the State An evening primrose, Oenothera tetraptera, has white flowers in its first stage, and red ones at a later period of development. Library of the World's Best Literature, Ancient and Modern — Volume 1 Evening Primrose; Night Willow-herb Oenothera biennis Flowers—Yellow, fragrant, opening at evening, 1 to 2 in. across, borne in terminal leafy-bracted spikes. Wild Flowers Worth Knowing The occurrence of mutations in Oenothera was first noticed by De Vries, the Dutch botanist, in the neighbourhood of Amsterdam in 1886. Hormones and Heredity In the first place I will describe a hybrid between two species of Oenothera, which I made some years ago. Species and Varieties, Their Origin by Mutation The petals of this beautiful and fragrant shrub, as well as of the Oenothera, tree primrose, and others, continue expanded but a few hours, falling off about noon, or soon after, in hot weather. The Botanic Garden. Part II. Containing the Loves of the Plants. a Poem. With Philosophical Notes. In a flower-garden containing some plants of Oenothera, the pollen of which can easily be recognised, I found not only single grains but masses of it within many flowers of Mimulus, Digitalis, Antirrhinum, and Linaria. Effects of Cross and Self Fertilisation in the Vegetable Kingdom MacDougal also obtained a more or less distinct mutant of Oenothera biennis. Darwin and Modern Science In this respect mutations as observed in Oenothera seem to be in striking contrast to the majority of Mendelian characters. Hormones and Heredity From the breeder's point of view our hybrid Oenothera would be a distinct gain, were it not for the difficulty of its propagation. Species and Varieties, Their Origin by Mutation Nor seem these two types to exhaust the range of variability of Oenothera cruciata. Species and Varieties, Their Origin by Mutation Among them are some of its near allies, the common and the small flowered evening-primrose, or Oenothera biennis and O. muricata. Species and Varieties, Their Origin by Mutation The external causes of this curious period of mutability are as yet wholly unknown and can hardly be guessed at, since the origin of the Oenothera Lamarckiana is veiled in mystery. Darwin and Modern Science It seems probable that mutations are of different kinds, as exemplified in Oenothera by gigas and rubricalyx respectively, the former producing only sterile hybrids, the latter behaving exactly like a Mendelian unit. Hormones and Heredity In the case of Oenothera muricata x biennis the differentiating units reduce the fertility to a low degree, threatening the offspring with almost complete infertility and extinction. Species and Varieties, Their Origin by Mutation Its immediate predecessor must have been the subgenus Onagra, which is considered by some authors as consisting of a single systematic species, Oenothera biennis. Species and Varieties, Their Origin by Mutation Oenothera biennis was introduced about 1614 from Virginia, or nearly three centuries ago. Species and Varieties, Their Origin by Mutation Oenothera gigas, for example, has stouter stems and denser foliage; the leaves are larger and broader; its thick flower-buds produce gigantic flowers, but only small fruits with large seeds. Darwin and Modern Science It must be explained that the young plant of Oenothera has practically no stem, but a number of leaves radiating in all directions from the growing point which is near the surface of the soil. Hormones and Heredity Only one or two exceptions could be quoted, as for instance the Oenothera brevistylis, which in its crosses always behaves as a pure retrogressive variety. Species and Varieties, Their Origin by Mutation The blade shows numbers of convexities on either surface, the whole surface being undulated in this manner; it lacks also the brightness of the ordinary evening-primrose or Oenothera biennis. Species and Varieties, Their Origin by Mutation It is the Oenothera elliptica, with narrow elliptical leaves and also with elliptical petals. Species and Varieties, Their Origin by Mutation New points of view in regard to these lines of inquiry have been adopted by H. de Vries who has succeeded in obtaining from Oenothera Lamarckiana a number of constant "elementary" species. Darwin and Modern Science The Mendelians, when the mutations of Oenothera were first described, endeavoured to show that they were merely examples of the segregation of factors from a heterozygous combination. Hormones and Heredity I have crossed another elementary species, the Oenothera hirtella with some of my new and with some older Linnean species, and got several constant hybrid races. Species and Varieties, Their Origin by Mutation One has been already alluded to; it pertains to the common evening-primrose or Oenothera biennis, and one is a species belonging to another genus of the same family, the great hairy willow-herb or _Epilobium hirsutum. Species and Varieties, Their Origin by Mutation In Oenothera the main stem is prolonged upwards beyond the fan; in the others the main stem is lacking or at least undiscernable, but this feature manifestly is only of secondary importance. Species and Varieties, Their Origin by Mutation The European types of Oenothera biennis and O. muricata are in the same condition. Darwin and Modern Science Since that time, however, the natural distribution and the cultural history of Oenothera has been very thoroughly worked out. Hormones and Heredity In unbalanced crosses of the genus Oenothera the hybrids of such reciprocal unions are often different, as we have previously shown. Species and Varieties, Their Origin by Mutation But it is manifest that the original production of the characters of Oenothera gigas was a phenomenon of far greater importance than the subsequent accidental transition of this quality into the active state. Species and Varieties, Their Origin by Mutation For manifestly the species of the large genus of Oenothera are grouped in swarms, the youngest or most recent of which we have under observation. Species and Varieties, Their Origin by Mutation Such is the case with the mutative origin of Xanthium commune Wootoni from New Mexico and of Oenothera biennis cruciata from Holland. Species and Varieties, Their Origin by Mutation Drosophila in the hands of Professor Morgan and his students and colleagues has thus become as classical a type as Oenothera in those of the botanical mutationists. Hormones and Heredity
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