Genetic Analysis and Combining Ability on Spikelet Fertility Related to Cold Tolerance in Japonica Rice
2006
Kim, K.Y. (Honam Agricultural Research Institute, NICS, RDA, Iksan, Republic of Korea), E-mail: [email protected] | Kim, B.K. (Honam Agricultural Research Institute, NICS, RDA, Iksan, Republic of Korea) | Ko, J.C. (Honam Agricultural Research Institute, NICS, RDA, Iksan, Republic of Korea) | Ko, J.K. (Honam Agricultural Research Institute, NICS, RDA, Iksan, Republic of Korea) | Kim, C.K. (Honam Agricultural Research Institute, NICS, RDA, Iksan, Republic of Korea) | Yun, S.J. (Chonbuk National University, Chonju, Honam Agricultural Research Institute, NICS, RDA, Iksan, Republic of Korea)
Each parent, P1 and P2, ten F1 hybrids among 5 parents, eight F1, B1 (F1 ×P1 ), and B2 (F1 ×P2 ) derived from 8 crosses were evaluated for spikelet fertility related to cold tolerance in cold-water irrigated plot. Heterosis for spikelet fertility varied from -8.6% to 60.5% with a mean of 20.6% and showed positive effects in all crosses except for Sambagbyeo/Stejaree 45, indicating that the gene effect is partial dominant. Heterobeltiosis ranged from -22.9% to 25.5% with a mean of -1.6%.
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