Bulletin No.269-281 1912-1913
Bulletin No.269-281 1912-1913
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Though a cross-fertilized type of wheat might be valuable by reason of greater vigor, productiveness, or disease resistance, such a type would doubtless be more difficult to keep in uniform condition than a self-fertilized variety. Cross-fertilized varieties of wheat would probably require the same persistent attention that must be given to varieties of cotton and other cross-fertilized plants in order to establish and maintain a uniform expression of the characters.
But even with the self-fert...ilised varieties continual reselection is needed to eliminate the degenerate individuals and lines of descent.
This is shown by the favorable results that are nearly always reported from such experiments. The strorger the tendency to degeneration the more beneficial the effects of reselection will appear, for there arc more of the inferior lines to eliminate.
Fig. 9.— Side view of the heads of a large- seeded variation of wild wheat as shown in figure s. to compare with figure 7.
(Natural .sizi\) 274 Digitized by Google A LARGE-SEEDED VARIATION OF WILD WHEAT.
What to read after Bulletin No.269-281 1912-1913?
You can find similar books in the "Read Also" column, or choose other free books by United States. Bureau of Plant Industry to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Though a cross-fertilized type of wheat might be valuable by reason of greater vigor, productiveness, or disease resistance, such a type would doubtless be more difficult to keep in uniform condition than a self-fertilized variety. Cross-fertilized varieties of wheat would probably require the same persistent attention that must be given to varieties of cotton and other cross-fertilized plants in order to establish and maintain a uniform expression of the characters.
But even with the self-fert...ilised varieties continual reselection is needed to eliminate the degenerate individuals and lines of descent.
This is shown by the favorable results that are nearly always reported from such experiments. The strorger the tendency to degeneration the more beneficial the effects of reselection will appear, for there arc more of the inferior lines to eliminate.
Fig. 9.— Side view of the heads of a large- seeded variation of wild wheat as shown in figure s. to compare with figure 7.
(Natural .sizi\) 274 Digitized by Google A LARGE-SEEDED VARIATION OF WILD WHEAT.
What to read after Bulletin No.269-281 1912-1913?
You can find similar books in the "Read Also" column, or choose other free books by United States. Bureau of Plant Industry to read onlineMoreLess
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