摘要
【目的】通过低温处理黄瓜幼苗,对耐寒性进行遗传分析。【方法】选取在低温弱光条件下生长速度不同的2份材料9507、9517及其配制的BC1、BC2、F1、F2等6个世代,进行低温处理,每天光照处理7.5h,强度为30μmol·m-2·s-1,约合2klx,昼/夜温度为12/8℃,共处理14d。运用主基因-多基因混合遗传模型方法研究生长速度的遗传规律,并估算遗传参数。【结果】生长速度的遗传受2对加性-显性主基因+加性-显性多基因控制,2对主基因的加性效应相同,显性效应略有不同,总加性效应很大。主基因+多基因遗传率占非常大的优势,环境方差对表型方差的影响很小。【结论】生长速度性状受环境影响较小,适于早代选择。
【Objective】 Heredity of chilling tolerance was analyzed in Cucumis sativus L.by carrying on low-temperature treatments.【Method】 In low-temperature treatments,i.e.12/8℃ in day/night,with 7.5 hours every day,and light intensity at 30 μmol·m-2·s-1 （or 2 klx） for 14 days,9507,9517 and their combinations BC1,BC2,F1,F2 and so on 6 generations,with different growth rates were used in experiment.The host gene-multi gene blending inheritance model method was used to study the genetic rule of growth rate,and estimate the genetic parameters.【Result】 The growth rate heredity was controlled by 2 pairs of additive – dominantmajor gene ＋ additive-dominant multi-genes,and the 2 pairs of host genes additive effect were the same,the dominant effect was slightly different,the total additive effect was very big.The main gene ＋ multigene heredity rate occupied an extremely large superiority,and the environment variance had very influence on phenotypic variance.【Conclusion】 Under the low temperature condition environment plays a very little role in the heredity of growth rate and it is suitable for the selection in early generation.
出处
《中国农业科学》
CAS
CSCD
北大核心
2010年第24期5073-5078,共6页
Scientia Agricultura Sinica
基金
"十五"辽宁省科技攻关项目(2002215004)
山西省农业科学院博士基金项目(ybsjj0909)
关键词
黄瓜
低温弱光
生长速度
主基因-多基因
遗传
cucumber （Cucumis sativus L.）
low temperature and weak light
growth speed
host gene-multi-genes
heredity
