イネの一代雑種利用に関する基礎的研究 : 第5報交配種子とF_1植物における正逆交配間差およびヘテロシス

概要

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Studies were carried out to examine the differences between the weight of seeds obtained from the panicles artificially restricted the kernel number and those obtained without restriction. The studies were also done to examine the differences of the F_1 seed weight and the plant height of F1 seedlings between reciprocal crossings. Results obtained are as follows : 1. There was no statistically significant differences between the weight of seeds obtained from the panicles restricted the kernel number and those obtained without restriction (Table 1). 2. Hybrid seeds obtained from the cross combinations whose maternal seed weight was heavier than that of the paternal variety were heavier than that from the reverse cross combinations (Table 1). 3. A reciprocal difference was found in plant height of many F_1 seedlings. That is, the plant height of F_1 obtained from the cross combinations whose maternal variety was Zenith showed a tendency that it was taller than that from the reverse cross combinations. On the other hand, reciprocal difference was not found in the culm length (Table 2). 4. A remarkable heterosis was observed in some crossings. The most excellent F_1 gave an increase 70% higher yield than that of the parents (Table 3).
日本作物学会の論文
1985-12-05