籼粳杂交稻穗部性状的遗传效应及其与环境互作

应用生态学报 ›› 2000, Vol. ›› Issue (1): 79-83.

籼粳杂交稻穗部性状的遗传效应及其与环境互作

梁康迳

福建农业大学作物科学学院, 福州350002

收稿日期:1999-05-13 修回日期:1999-11-01 出版日期:2000-01-25
基金资助:
农业部中华农业科教基金资助项目;福建省教委科技资助项目(K99161)

Genetic effect of panicle traits of intersubspecific crosses of rice ( Oryza sativa ) and its interaction with environment

LIANG Kangjing

College of Crop Science, Fujian Agricultural University, Fuzhou 350002

Received:1999-05-13 Revised:1999-11-01 Online:2000-01-25

摘要/Abstract

摘要： 采用包括基因型与环境互作效应的加性-显性-加性×加性上位性遗传模型,分析了不同环境下籼粳杂交稻穗部性状的遗传特点.结果表明,除了主穗粒数的加性与环境互作和二次枝梗数的显性与环境互作不显著外,其他性状均存在显著和极显著的加性、显性、加性×加性上位性遗传效应及其与环境的互作效应,其中均以显性效应为主,显性与环境互作效应对枝梗性状的影响较为明显.遗传率分析表明,各性状的普通广义遗传率最大,互作遗传率也有一定作用.杂种优势预测表明,除了一次、二次枝梗数外,其他性状均表现正向的杂种优势,基因型与环境互作只影响杂种优势表达的程度,而不改变其方向.遗传效应预测值结果表明,IR66158-37、IR65600-85、明恢63和R6694个亲本可以明显改良杂交后代多数穗部性状,且环境影响程度较小,可作为优良亲本列于育种计划中.

Abstract: The models of genetic effects and genotype譭nvironment interaction for Additive-Dominant-Additive譇dditive epistasis were used to analyze the panicle traits of intersubspecific crosses of rice (Oryza sativa.) in different environments. It was found that significant additive, dominant and additive譨dditive epistatic effects and genotype譭nvironment (GE) interaction were observed in main panicle length, spikelet density, primary branches, total lengths of primary and secondary branches, but the numbers of main panicle and secondary branches showed no significant additive譭nvironment (AE) interaction and dominant譭nvironment (DE) interaction.The seven traits studied were mainly controlled by dominant effects, but branches traits were more obviously affected by DE interaction. Heritabilities analysis showed that the general heritability in broad sense (H_G²) was much larger than other heritabilities. To certain extent,the interaction heritabilities showed their effects in seven panicle traits tested. Heterotic prediction indicated a positive heterosis in all panicle traits except the numbers of primary and secondary branches. GE only influenced the expression extents of heterosis, but was not able to change their directions. According to the predicated genetic effects,IR66158-37,IR65600-85,Minhui63 and R669 were better than other parents in the tactics of breeding for improving panicle traits, because the progenies from these crosses always showed that panicle traits were slightly affected by environment.

梁康迳. 籼粳杂交稻穗部性状的遗传效应及其与环境互作[J]. 应用生态学报, 2000, (1): 79-83.

LIANG Kangjing. Genetic effect of panicle traits of intersubspecific crosses of rice ( Oryza sativa ) and its interaction with environment[J]. Chinese Journal of Applied Ecology, 2000, (1): 79-83.

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