云南香型软米水稻资源农艺性状遗传效应研究

选取5份云南地方香型软米水稻种质资源和6份自育香型软米保持系按5×6不完全双列杂交设计(NCⅡ)配制成30个组合,采用加性-显性-上位性遗传模型,分析云南香型软米11个农艺性状的遗传效应。结果表明,云南香型软米多数农艺性状的遗传主要受加×加上位性效应、加性×环境效应、显性×环境效应的影响,还存在不同程度的加性效应和显性效应,单株产量受基因加性效应、显性效应、加×加上位性效应、加性×环境效应、显性×环境效应的影响;株高、有效穗的遗传率以普通狭义遗传率为主,其他性状的普通狭义遗传率和互作狭义遗传率均达极显著水平;产量构成性状之间存在不同类型和不同程度的遗传相关,多数性状之间以加×加上位性、加性×环境和显性×环境互作效应显著。

The genetic effects of agronomic traits in Yunnan aromatic soft rice resources

The genetic effects of 11 agronomic traits were analyzed using an additive-dominance-epistasis model in incomplete diallel cross (NCII) design experiment. A total of 30 crosses were derived from 5 aromatic soft rice landraces in Yunnan as female parents and 6 own-breeding aromatic soft maintenance lines as male parents. The results showed that most agronomic traits of aromatic soft rice were affected by additive × additive epistasis, additive × environment interaction and dominance × environment interaction, and the additive effect and dominance effect were detected at different levels. Yield per plant was affected by gene additive effect, dominance effect, additive × additive epistasis, additive × environment interaction, dominance × environment interaction. The general narrow sense heritability of plant height and panicle number was predominant and the other traits of the general narrow sense heritability and interactive narrow sense heritability have significance at 0.01 level; The genetic correlation among yield components were detected at different types and levels, and the genetic correlation among most traits were mainly affected by additive × additive epistasis, additive × environment interaction, and dominance × environment interaction.