花卉育種における倍数体の領域とその利用性に関する研究 : 第8報ゼラニウム、ペラルゴニウム類にみられる自然倍数性と稔実性について

概要

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In regard to the somatic chromosome numbers of the commercial varieties in geraniums, 24 vars. were confirmed to be diploid (2n=18) and 4 were tetraploid (2n=36). Fifteen vars. of pelargoniums were all 2n=45 and assumed to be allopolyploid. Three vars. of ivy leaf geranium were 2n=36, and a lemon-scented geranium was 2n=16. Contrary to the higher percentages of pollen fertility, most vars. of this genus hardly produced good seeds under open-pollination possibly due to protandrous-nature, self- and cross-incompatibility, degeneration of gemates etc. As the results of artificial cross-pollination in geraniums, percentages of fertilized ovules were 0 to 0.53% between tetraploids and diploids, and 0 to 12.60% between diploids and diploids. In pelargoniums, however, all crosses failed to set seed.
日本育種学会の論文
1970-06-30