シュードガミーは固定に役立つか
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概要
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Since the report by EAST (1930) to this day, we thremmatologists have had an opinion about the chromosome doubling through pseudogamy together with the induced diploidy of haploid plants, ie., these phenomena contribute to obtain trustworthy homozygote. Concerning this type of homozygote, all progenies should show definite uniform characters in each strain. In this connection, ABE (1912) had crossed 4x Hero of Lockinge musk melon to the F_1 (British Queen×Earl's Favourite), and had selected at the next generation (F_2'), in order to shorten a period for fixing. But on the contrary of the above customary idea, the author had observed considerable segregation in the fruit size and in the length of internodes of setting lateral vines in that progeny (F_3'). He has trusted for several years to induce pseudogamy in many crops such as cucumber, egg plants, Brassica sp., lilies, and etc. During these operation, he paied deep attention for pollen scattering in the wind and possible pollen carrier of very small size such as thrips and red spider. And, he had obtained none of complete seeds in any material. So, the question in regard to the above segregation has been pending for several years. He imagines the possibility of mutation-occurrence in the process of chromosome doubling through pseudogamy, following the example of BLAKESLEE, MORRISON, and AVERY's data (1927) working on the haploid plant of Datura. He also, proposes to pay attention to the POPENOE's description (1924) on the variation between the trees grown from a seed, in size and shape of fruit, and in the amount of fiber around the seeds of Mulgoba mango.
- 1956-12-30