Genetic Analysis for F1 Yield Traits with Conditional Approach in Island Cotton (Gossypium barbadense L.)
A genetic model with additive, dominance and genotype × environment interaction effect was employed to analyze the 3-year data of F1 hybrids from 5 × 4 diallel cross, whose parents were Island cotton and had different fruit branch types. Unconditional and conditional genetic variances were conducted for analyze genetic impacts of yield components on yield. Results of unconditional genetic variances showed that there were no additive variance of total lint yield. But conditional additive effects of total lint yield, when excluding the phenotype of boll weight, boll number at prefrost, boll number at postfrost, and lint yield at prefrost,indicated that improving the additive effects of the total lint yield was still possible. Crossing and selecting component traits with high contributive additive effects could obtain good offsprings. Yield components contributed large dominance effects to the heterosis of lint yield at prefrost and total lint yield in crosses. Yield component traits were controlled with each other. The traits having positive contributive effects could be applied to further improve target traits.
Diallel analysisunconditional and conditional variancesyield traitsGossypium barbadense L
梅拥军、叶子弘、张利莉
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塔里木大学植物科技学院,新疆,843300
中国计量学院生命科学学院,杭州,310018
双列杂交 非条件和条件方差 产量性状 海岛棉
Foundation of China Jiliang UniversityKey Program of Presidential Funds of Tarim University
NETL
NSTL
万方数据
维普
