Plant Breeding Comments On the Experiments of Nilsson And Burbank
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To quickly assess the difficulty of the text, read a short excerpt:
Th. , p. 82), but on the other hand it gives a stronger support to the theory of the saltatory origin of species.
Among the results of the breeders' activity, two main 94 PLANT-BREEDING types of races must be distinguished. In the first place, those races which never become independent of continued selection, and for which the seed must be produced anew in each generation from a stock of so-called elite plants. The other type embraces those varieties which after a short- er or longer period of ...selection become self-dependent and may henceforth be multiplied without special care.
The prototype of the first kind is given by the sugar- beets. Here the selection works with the ordinary char- acters of the plant, the amount of sugar, the shape of the roots, the properties of the foliage, and other features. No chance, no sport has produced them, they are simply taken as the plants are offering them everywhere. In consequence, they remain dependent on selection, and though a mul- tiplication during one generation without renewed polariza- tion is often unavoidable, an intervention of two genera- tions is but seldom allowed, and the lack of selection in more than two generations would annihilate nearly all the effect of the whole method.
What to read after Plant Breeding Comments On the Experiments of Nilsson And Burbank?
You can find similar books in the "Read Also" column, or choose other free books by Vries Hugo De to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Th. , p. 82), but on the other hand it gives a stronger support to the theory of the saltatory origin of species.
Among the results of the breeders' activity, two main 94 PLANT-BREEDING types of races must be distinguished. In the first place, those races which never become independent of continued selection, and for which the seed must be produced anew in each generation from a stock of so-called elite plants. The other type embraces those varieties which after a short- er or longer period of ...selection become self-dependent and may henceforth be multiplied without special care.
The prototype of the first kind is given by the sugar- beets. Here the selection works with the ordinary char- acters of the plant, the amount of sugar, the shape of the roots, the properties of the foliage, and other features. No chance, no sport has produced them, they are simply taken as the plants are offering them everywhere. In consequence, they remain dependent on selection, and though a mul- tiplication during one generation without renewed polariza- tion is often unavoidable, an intervention of two genera- tions is but seldom allowed, and the lack of selection in more than two generations would annihilate nearly all the effect of the whole method.
What to read after Plant Breeding Comments On the Experiments of Nilsson And Burbank?
You can find similar books in the "Read Also" column, or choose other free books by Vries Hugo De to read onlineMoreLess
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