雄性不稔을 利用한 水稻 雜種品種 開發 ⅩⅠ. japonica형 水稻에서 育成된 細胞質的-遺傳子的 雄性不稔系統들과 稔性回復系統들의 組合能力

• 영문명: Development of hybrid rice facilitated by cytoplasmic-genetic male sterility ⅩⅠ. Combining ability of CGMS and restorer lines for yield and its associated characters in japonica rice
• 발행기관: 한국육종학회
• 저자명: Hee Jong Koh(高熙宗) Mun Hue Heu(許文會)
• 간행물 정보: 『한국육종학회지』Vol.22 No.4, 19~28쪽, 전체 10쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1990.12.30

영문 초록

We have bred a hybrid rice system of Japonica rice. Combining ability of the developed CGMS and restorer lines, and the extent of heterosis for yield and its associated characters were examined in this study. Rough rice yield of 42 F₁ hybrids ranged from 442.4kg/10a (Gwanak ms/TP1278) to 831. 0kg/10a (Samnam ms/TP1450) with the average of 629.0kg/10a. The heterobeltiosis for grain yield ranged from -31.9% to 15.4% with the average of -1.6%. Estimates of variance for GCA were greater than those for SCA except grain yield, and variances for GCA in all characters except 1000 grains weight were greater in the female (CGMS line) than in the male(restorer line). Combining ability test resulted that Samnam ms as CGMS line, and TP1450, TP664 and TP 1278 as restorer line were promising for hybrid rice. There were significant correlations between the heterosis for grain yield and that for total-shoot dry weight at harvesting stage, and that for harvest index. Grains per panicle out of yield components was mainly responsible for the grain yield of F₁ hybrids. The values of grain yield and its associated characters of F₁ hybrids of CGMS/restorer were generally lower than those of corresponding maintainer/restorer, however there was a highly significant correlation (r=0.8635**) between the grain yield of F₁ of CGMS/restorer and maintainer/restorer. Relative grain yield of F₂ and F₃, in per cent of grain yield of corresponding F₁, ranged from 81.7% to 90.7% and from 87.8% to 97.8%, respectively. None of 14 bulk F₂ and F₃ hybrids, excepts F₃ of Samnam ms/TP929, showed higher yield than its better parent.

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