カンキツ交雑実生群における果皮の粗滑の分離

概要

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Segregation patterns of citrus rind texture were studied in 1944 seedlings derived from 99 cross combinations employing 51 parent cultivars. Rind texture was classfied into five classes: smooth, slightly smooth, medium, slightly coarse and coarse.Of 51 parent cultivars, 33 belonged to smooth group, 7 to slightly smooth group, 7 to medium group and 4 to slightly coarse group.Frequency of smooth texture in hybrid seedlings generally increased as the rind texture of the parent materials was smoother. However, no significant difference was observed in segregation patterns of hybrid seedlings between smooth and slightly smooth, and between medium and slightly coarse. Smooth and slightly smooth parents were divided into two groups, A and B, based on segregation patterns of hybrid seedlings. Smooth and slightly smooth parents of A group yielded more hybrids with smooth and slightly smooth rind texture than did those of B group.These results suggest that the rind texture in citrus is not controlled by a single major gene. The results also suggest that smooth and slightly smooth varieties in A group may be more homozygous than those in B group. Therefore, smooth and slightly smooth varieties in A group appeared to be useful parents for obtaining hybrid seedlings with smooth rind texture.
園藝學會の論文