Aegilops ovata細胞質に対するパン小麦品種Chinese Springの稔性回復作用のモノソミックス分析〔英文〕

概要

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In order to provide a genetic basis for fertility restoration by a common wheat, Triticum aestivum cv. Chinese Spring against the cytoplasm of Aegilops ovata, two sets of monosomic analysis have been carried out. From the results, the following conclusions were drawn: (1) Rfo2 gene, a key factor on chromosome 1B of Chinese Spring restores in its double dose selfed seed fertility to above 25%, (2) in its single dose the presence of a factor on chromosome 7A and another factor either on chromosome 5A or 5B, both in double dose, is necessary to assure the same level of fertility restoration, (3) absence of the key gene (Rfo2) causes complete sterility, and (4) modifiers which improve the level of fertility restoration to some extent are located on chromosome 1A, 4A and 7D of Chinese Spring. Since the single dose of Rfo2 gene can not restore fertility to above 25% when other restoring genes are in heterozygous condition, utilization of this gene in breeding both hybrid wheat and bred-true, fertile line with the ovata cytoplasm is greatly limited. The results provided another example of the linkage between fertility- restoring gene and a nucleolus-organizing region.
日本遺伝学会の論文