Horticulturists, as Bateson has written, are "aware of the great and striking variations which occur in so many orders of plants when hybridization is effected.
Elliot and Suchetet have studied carefully the question of hybridization occurring normally among birds, and have got together a very large body of evidence.
If hybridization did occur, the differences in mating call subsequently were enhanced, thereby providing a valid isolating mechanism in sympatric populations.
The criticism has often been made of modern studies in hybridization that they are really unimportant for evolution because hybridization is uncommon in nature.
Combined with the fact of hybridization it indicates that the main problem of evolution is that of the origin of specific characteristics.
We now realize that in naturehybridization may and actually does proceed extensively.
Not only was the fact of recurrence of ancestral types in domesticated organisms accepted, but the idea that, in some way, hybridization per se destroyed the results of breeding under domestication was maintained.
It is not my purpose to treat of the doctrine of hybridization at any length.
Oenotheras are native to America and all of the species growing in Europe have escaped from gardens directly, or may have arisen by mutation, or by hybridization of introduced species.
Hybridization and vegetative multiplication of the hybrids no doubt occur in nature, but they are very rare, when compared with the ordinary method of propagation by seed.
Our present varieties are due to hybridization and selection, each of them being propagated only in the vegetative way.
His methods are hybridization and selection in the broadest sense and on the largest scale.
In practice selection and hybridization go hand in hand and it is often difficult to ascertain what part of [752] the result is due to the one, and what to the other factor.
A species may consist of larger or smaller groups of such units, and they may be absolutely constant, never sporting if hybridization is precluded, and nevertheless it may be called highly variable.
Starting from these considerations, we will now give some illustrative examples, and for the first, choose one in which hybridization is almost completely excluded.
The dahlias have been derived from three or more original species, and been subjected to cultivation and hybridization in an ever-increasing scale for a century.
Some of these are really surprising varieties of the combination hazels and filberts, but a complete history of the hybridization work and the results really deserve a separate account to be published some time in the future.
These closely related species apparently hybridize with each other, but accurate information as to the nature and extent of such hybridization is not available.
Perhaps hybridization with ~Castanea mollissima~ varieties may bring something very fine and valuable.
There have been brought improvements into our cultivated plants through the hybridization of clones that all of the horticulturists are familiar with.
It is obvious that hybridization differs more in degree than in kind from cross-fertilization.
The artificial process is practically the same in hybridization as in cross-fertilization, but usually requires more care.
Not only do these great practical difficulties lie in the way of applying the hybridization test, but even when this oracle can be questioned, its replies are sometimes as doubtful as those of Delphi.
But it is not as yet proved that a race ever exhibits, when crossed with another race of the same species, those phenomena of hybridizationwhich are exhibited by many species when crossed with other species.
But it is not as yet proved that a race ever exhibits, when crossed with another race of the same species, those phænomena of hybridization which are exhibited by many species when crossed with other species.
Pope and Boring (1940) suggested hybridization between the two species in eastern China, and the above mentioned facts suggest to us the possibility of hybridization in other regions.
We are now on the verge of a great development in hybridization or crossing of choice kinds of hickories and in determining upon which stocks the different kinds of selected hickories may be grown to best advantage.
Those who have given the matter consideration are thoroughly convinced of the great possibilities of systematic hybridization of nut trees.
The new forms brought about by hybridization may be fixed, or made permanent, by such selection as is mentioned in Section XVIII.
Sometimes we are able by hybridization to combine in one plant the good qualities of two other plants and thus make a great advance in agriculture.
Hybridization is of great aid in originating new plants.
Second, doubling of the chromosome number makes possible hybridization of individuals heretofore unsuccessful in such effort.
Discussion on Cultivation and Fertilizers for Nut Trees 31 Personal Experiences with Hybridizationof Nut Trees, Dr.
Our best types are largely the ones which have been secured by hybridization and the same will be true of nuts.
And when we realize that the pink was probably the first flower upon which, early in the eighteenth century, experiments in hybridization were tried, the intricacy will be fully understood.
This is more and more apparent each year, when the fittest are still further developed by hybridization for survival and the indifferent species drop out of sight.
Personally, and because I am not as thoroughly aware of the field of Doctor Morris' hybridization work as I ought to be, I should like to ask him what combinations of the hickories he has effected thus far.
Mr. Reed: We haven't devoted a great deal of attention to the hybridization of nuts in our Department work.
The winter buds of the open-bud group resemble the winter buds of the walnuts in a general way, and in artificial hybridization experiments I seem to note a close relationship between the open-bud hickories and the walnuts.
In studying the effect of hybridization upon the production of mutations in Drosophila, F.
A new variety originating from hybridization is but a recombination of the characters of the parents; the combination is new but the characters are not.
This variety offers excellent material for hybridization with native grapes.
Consequently, hybridization was a maze in which these breeders often lost themselves.
With the hickories I think rather free hybridization occurs back and forth among all, but particularly in relation to groups.
It is only on some such ground as the findings of Loeb that we can explain such a very unusual hybridization as that, which appeared to me a valid one, of a cross between an oak and a walnut.
Hybridization occurred in my chinkapins from this white oak pollen.
Professor Smith: I should like to ask why, if this free hybridization takes place in nature among the hickories, you do not have a perfect complex of trees showing all possible variations in the forest.
Mass hybridization between two genera of cyprinid fishes in the Mohave Desert, California.
He showed a knowledge of the possibilities of hybridization of American species with Vitis vinifera.
Its place of origin ("in the vicinity of an old vineyard of European kinds") would indicate that there was an opportunity for hybridization to take place.
Yet he suggests, and was probably the first to do so, the possibility of hybridization between American and the European species.
Nearly thirty years before, Nuttall, the then famous botanist of Harvard University, had recommended suchhybridization to American grape-growers.
There is in fact by both varieties lots of room for improvement, which only could be gained through scientific hybridization and which we hope will be realized to a certain extent at least in a comparative few years.
What we know about practical plant hybridization leads us to believe that we can combine the good qualities of these various species of hickories.
There has been spoken of two or three times during the day the great progress which is likely to be made in systematic hybridization of nuts.
This, perhaps, is a good example of many of the seedlings of Chinese Cling--the influence of another parent and the stimulus of hybridization are apparent.
The attempt to hold it and its seedlings in a distinct group fails, as we have tried to show in discussing groups of peaches, because through hybridization they are hopelessly confused with other stocks.
Hybridization between the cultivated stone-fruits adds to the perplexities of classification.
He sought proof for his theory in hybridization and on a tree raised from the seed of an almond fertilized by peach-pollen produced a fruit with soft and melting flesh and in all characteristics more like the peach than the almond.
SLATE New York (Geneva) Agricultural Experiment Station This paper reports the results of attempts to improve filberts by hybridization at the Experiment Station at Geneva, N.
One seedling obtained previously by this hybridization is not yet bearing.
Now, although this explanation may well apply to a case of graft-hybridization by means of buds, it obviously cannot do so to any case where hybridization is produced by the grafting of woody tissues.
Possibly Weismann may dispute the fact of hybridization in any of these cases; but, as he has not expressly done so, I will not go into the question of evidence[39].
In Colorado and adjacent regions meeting with the form bairdi, which ranges northward from Arizona, hybridization has occurred, and we have a fixed form breeding either toward bairdi or oregonia.
The species appears to be, like all the others of the genus, somewhat unstable and plastic, or else hybridization is very frequent in this genus.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "hybridization" in a variety of sentences. We hope that you will now be able to make sentences using this word.
