タバコ属植物の交雑におけるX線処理花粉の影響 : I.タバコとアラータ節植物との交雑について

概要

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Pollen grains Which had been treated with various dcsages of X-rays, ranging from 0 to 9600 r, were dusted on the stigma of various species in order to reveal the infiuence of X-rays upon interspecific crosses in Nicotialea. Reciprocal crosses of N. tabacum (n=24) with N. alata (n=9). N. Lalegsdorffii (n=9) and N. Iogiflora (n=10) were used as materials. In the case of crosses N. tabacum ( ) x alata group ( ), the majority of flowers set capsules containing many empty seeds, if fresh pollens were used. With increasing X-ray dosage, filled seeds were produced attaining the maximum (2-8 %) at 4800-9600 r. Beyond that amount, their frequency was again decreasing. Percentage of capsules, number of seeds per capsule, weight of single seed etc, displayed a similar trend. Most suitable dosages for germination, however, are lower than those for producing filled seeds.
日本育種学会の論文
1957-07-25