Triticum pyramidale × Secale africanum F_1植物の細胞遺伝学的研究

概要

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1. In 1953, 1036 flowers on 60 spikes, of Triticum pyra.midale were pollinated with the pollen of Secale africanum, and two F_1 plants were obtained the percentage of the raised F_1 Individuals to the number of all the pollinated flowers being 0.19 percent. 2. Almost all the external characters, of the F_1 plant, excepting the length of spike, were intermediate between those of the parents, (Table 1), the length of spikes, showing closer value to the pollen parent. 3. The number of sornatic chromosomes of F_1 plant was counted to be 21, and corresponds to the sum of the gametic number of the parents. 4. In the heterotypic division of PMC's of the F1 plants, 0-3 bivalents or 21-15 univalents, were observed (Table 2). The frequency of bivalents in PMC's, was shown in Table 2, the case ,of zero in the number of bivalents, appeared to be the nlode. These 0-3 bivalents might probably be derived from autosyndesis between the chromosomes of AB genomes of Tritic+ulee pyramidale used as the mother plant.
日本育種学会の論文
1957-03-25