. The cotton plant in Egypt, studies in physiology and genetics. Cotton; Cotton. VI COMMERCIAL VARIETIES III as takes place through seed mixture is relatively unimportant in comparison with contamination of the ovaries by foreign pollen. We have already laid emphasis on the external similarity of the different varieties, and its bearing now becomes apparent. A field grown under the name of Afifi might consist in reality of a mixture of five or six varieties with the original stock, together with all possible combinations and permutations of their multi- farious gametes, but the difference woul
. The cotton plant in Egypt, studies in physiology and genetics. Cotton; Cotton. VI COMMERCIAL VARIETIES III as takes place through seed mixture is relatively unimportant in comparison with contamination of the ovaries by foreign pollen. We have already laid emphasis on the external similarity of the different varieties, and its bearing now becomes apparent. A field grown under the name of Afifi might consist in reality of a mixture of five or six varieties with the original stock, together with all possible combinations and permutations of their multi- farious gametes, but the difference would be almost ^100-101 a O 110-111 Length of Lint in mm. 25 â 30 as 'I III! Ill 11)11II11 n 11II ml II. 25 30 35 25 30 35 I III [Ill null |l I III III II jl|UIIIII I l|l MM III l|ll I I mil Variety of igio Variety of 1909" Two Pure Strains. Two Commercial Varieties. Fig. 50.âThe Impurity op Commercial Varieties. Target-diagram plotted from random single-plant samples in 1911. Identical treatment, site, cultivation (wide-sown) and methods. Compared in respect of only two important commercial characteristics. o = Variety-type, under given conditions. invisible till the bolls opened. The mere fact that such a cotton as Yannovitch was a simple single-plant isolation from Afifi demonstrates this statement sufficiently without resort to our detailed tables of plant to plant differences {, Fig. 50). Further, although the author has quoted Egyptian illustrations, the same arguments apply to American Uplands, to Sea Islands, and to the few Indian cottons which he has studied. Mr. H. Martin Leake has demonstrated exactly similar heterogeneity in both. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Balls, William Lawrence, 1882-. London, Macmillan and Co. , Ltd.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
