Plant Genetics
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In our eReader you can find the full English version of the book. Read Plant Genetics Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Plant Genetics
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East of course did not continue to investigate all of these 85 types, but concentrated upon two representatives chiefly. Corn was selected as rep- resenting species normally cross-fertilized in nature, while tobacco was used as representing those species generally self-fertilized in nature. East's results with corn need not be discussed, for they confirmed in every point Shull's results. One very valuable addition, however, was made; namely, that some crosses resulted in relatively less hybrid ...vigor than others. For this re- sult East developed a very significant explanation, which has revolutionized ideas on hybrid vigor, and that is that hybrid vigor is proportional to the number of factors in which parents differ. This situation may be visuahzed from the diagram, in coimection with which certain situations may be developed.
Parents F* AABBCCDDXAABBCCdd =AABBCCDd =little hybrid vigor AABBCCDDXAABBccdd =AABBCcDd = more hybrid vigor AABBCCDDXAAbbccdd =AA BbCcDd = still more hybrid vigor AABBCCDDXaabbccdd =AaBbCcDd =most hybrid vigor It is the Fi generation of course that shows the vigor, but what index can be obtained from the germinal formula of the Fi generation as to the amount of hybrid vigor that it will show ?
What to read after Plant Genetics?
You can find similar books in the "Read Also" column, or choose other free books by John Merle Coulter to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
East of course did not continue to investigate all of these 85 types, but concentrated upon two representatives chiefly. Corn was selected as rep- resenting species normally cross-fertilized in nature, while tobacco was used as representing those species generally self-fertilized in nature. East's results with corn need not be discussed, for they confirmed in every point Shull's results. One very valuable addition, however, was made; namely, that some crosses resulted in relatively less hybrid ...vigor than others. For this re- sult East developed a very significant explanation, which has revolutionized ideas on hybrid vigor, and that is that hybrid vigor is proportional to the number of factors in which parents differ. This situation may be visuahzed from the diagram, in coimection with which certain situations may be developed.
Parents F* AABBCCDDXAABBCCdd =AABBCCDd =little hybrid vigor AABBCCDDXAABBccdd =AABBCcDd = more hybrid vigor AABBCCDDXAAbbccdd =AA BbCcDd = still more hybrid vigor AABBCCDDXaabbccdd =AaBbCcDd =most hybrid vigor It is the Fi generation of course that shows the vigor, but what index can be obtained from the germinal formula of the Fi generation as to the amount of hybrid vigor that it will show ?
What to read after Plant Genetics?
You can find similar books in the "Read Also" column, or choose other free books by John Merle Coulter to read onlineMoreLess
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