稲の新しい突然変異体「密粒不稔稲」に就いて : 長尾・高橋:稲の交雑に関する研究XI

概要

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A sterile mutant was found in 1946 from the population of a rice variety Ebisu-Mochi and was named ,Compact-paniculous sterile" by the authors. As compared viith the original variety, this mutant is taller in stem heig:ht, Iess in tillering, Ionger and broader in leaf sizes preseriting sonewhat staut appearance as well as deeper green color. If must be stated, furthermore; that this mutant shows high sterility, the seed setting amounting about 20 per cent of a panicle, and that there are observed variotis types of spikelets where deformations, excessive developments take place ip floral organs such as glumes, pistil, anthers, Iodicules as. well as ovu-les. " ' It may be considered that the sterility of this mutant is exolusively owing to the abnormal development and degerneration in embryoac, the occurrence of which amounting about 50 per cent of the observed embryosacs under microscope, whereas the polen grains are recrarded to be complete and healthy in the view of the, results of germinat-ion experiment and morphologicai observations. This mutant ever breeds true for generations. The mode of its inheritance remains to be proved in detail fot further investigation, however, this possively seems to be a case of point mutation that occurs in a certain chr.omoome locus. Plant Breeding Institute, Faculry of Agricultufe, Hokkaido Universlty, Sapporo.
日本育種学会の論文
1951-11-30