| 摘要: |
| 用朱军的基因型×环境互作的加性、显性遗传模型(ADE)对11个甘蔗亲本,及以5×6不完全双列杂交配制的30个杂交组合实生苗的7个主要性状进行了分析。结果表明:(1)各性状普遍存在基因加性效应和显性效应及基因型×环境互作效应,但不同性状的加性效应和显性效应所起的作用不同;(2)不同性状的遗传率大小不同,受环境影响也不同,较大的互作狭义遗传率受环境影响较大,一般而言,除锤度外,其余性状的遗传率都以普通狭义遗传率为主,互作狭义遗传率较小;(3)所有性状之间都存在遗传相关,多数性状之间以加性和显性相关为主,环境条件对各性状遗传相关的影响主要表现为显性×环境互作相关。 |
| 关键词: 主要性状 遗传分析 基因型×环境互作 甘蔗 |
| DOI： |
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| 基金项目:广东省“十五”重大科技专项(A20602) |
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| Genentic analysis of genotype×environment interaction for major characters of sugarcane |
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| Abstract: |
| Seven major characters of 30 hybridized seedlings developed by eleven parents of sugarcane and 5×6 incomplete dialled cross genetic design were analyzed.The results showed that:(1) All characters were affected by not only additive gene action and dominant gene action but also genotype×environment interactions.But their importance differed to different characters.(2) The estimates of heritability components were obtained for all characters.The heritability components varied with traits.In addition,the heritability was to some extent affected by environment for all characters,and largely affected for the traits that were larger interaction heritability estimates.In general,the general narrow sense heritabilities were high for all characters except for effective brix,while the interactive narrow sense heritabilities were low.(3) Significant genetic correlations were observed among all characters.The magnitude and direction of correlation differed for different trait combinations.Additive and dominant genetic effects contributed mainly to the genetic correlations for most of trait combinations.The effects of environments on genetic correlation exhibited mainly as dominant×environment interaction-correlations. |
| Key words: major characters genetic analysis genotype×environment interaction sugarcane |
