. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. 284 GENETICS IN RELATION TO AGRICULTURE character of (E. rubicalyx is conditioned by one or two specific factors. This new form (see Fig. 118) was discovered by Gates in 1907, among a population of over 100 rubrinervis plants grown from self-fertilized seed of rubrinervis. The original rubricalyx plant when self-fertilized produced 12 plants, 11 rubricalyx and 1 rubrinervis, which would indicate that the original rubricalyx plant was heterozygous for one or more factors for excessive production of
. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. 284 GENETICS IN RELATION TO AGRICULTURE character of (E. rubicalyx is conditioned by one or two specific factors. This new form (see Fig. 118) was discovered by Gates in 1907, among a population of over 100 rubrinervis plants grown from self-fertilized seed of rubrinervis. The original rubricalyx plant when self-fertilized produced 12 plants, 11 rubricalyx and 1 rubrinervis, which would indicate that the original rubricalyx plant was heterozygous for one or more factors for excessive production of anthocyanin and that rubricalyx is dominant to rubrinervis. Gates has raised ten generations of rubrinervis (more than. Fig. 118.—Flower bud and leaf of A, QSnoihcra rubrinervis; B, (E. rubricalyx. The deeper pigmentation of rubricalyx is not confined to the bud and lower side of the leaves, but is also present in the stems. The rosette leaves also show more or less color on the midrib in rubricalyx. one pedigreed strain) and found it to breed true and he has one strain of rubricalyx that has bred true for five years, but as yet there are no data on the results of a cross between them where the F-i progeny were grown on a large scale and with controlled seed germination. However, in Fi rubricalyx is dominant. Another Qinothera cliaracter which is inherited in simple Mendelian fashion is tlie typical feature of brcvistylis (Fig. 115). Brevistylis is known to breed true when self-fertilized and the results of various crosses indicate that the short style is conditioned by a single factor, although it is not always completely recessive in Fi. Thus we find that, while most of the experimental breeding data on Oenotheras cannot be interpreted in terms of ordinary Mendelian concepts, neverthe- Digitized by Microsoft®. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illus
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