摘要: 采用两种不同的遗传方法,分析弱光下黄瓜自交系M22、M14及其6个世代幼苗叶片总叶绿素含量的遗传效应,以期能从基因作用方面阐明黄瓜耐弱光遗传机制。6个世代联合遗传分析方法研究结果表明,弱光下总叶绿素含量遗传符合加性-显性-上位性多基因遗传模型,B1、B2、F2多基因遗传率分别为41.60%,43.68%和68.13%。应用世代平均数分析方法进行遗传效应估计,结果表明,叶绿素含量遗传符合加性-显性-上位性遗传模型,其中平均显性度为2.001,为超显性遗传。研究结果表明,控制黄瓜总叶绿素含量性状基因间为加性-显性-上位性作用,以微效多基因为主,受环境影响较大,不宜进行早代选择。
关键词:
黄瓜,
弱光,
叶绿素,
遗传分析,
微效多基因
Abstract: The genetic effects of chlorophyll contents of cucumber inbred lines (Mz2,M}4) and their six generationsseedling under low light was analyzed by using tow different genetic methods. The principle of genetics was studied withjoint analysis of six generations and the results indicated that the chlorophyll contents of B1,B2,F2 under low light fit to amajor gene plus additive-dominance-epistasis polygene model,and the polygene heritability are 41.60%,43. 68%and68.13%respectively. The genetic effect was studied by the generation average method, the result indicated that thechlorophyll contents also fit to additiv cbminanc epitasis model,the degree of mean dominance is 2. 001,which indicat-ed the exceed inheritance. This study indicated that the genes which control the whole chlorophyll contents are additive-cbminanc epitasis and most are min effect polygene,so this is fected by environment easily,cbes not fit to the earlierchoice.
Key words:
Cucumber,
Low light,
Chlorophyll contents,
Genetic analysis,
Min-polygene
中图分类号:
李丹丹, 司龙亭, 李季, 金正爱, 牛海臣. 弱光下黄瓜幼苗叶片叶绿素含量的遗传分析[J]. 华北农学报, 2009, 24(1): 133-137. doi: 10.7668/hbnxb.2009.01.030.
LI Dan-dan, SI Long-ting, LI Ji, JIN Zheng-ai, NIU Hai-chen. Genetic Analysis on Chlorophyll Contents of Cucumber Seedling under Low Light[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2009, 24(1): 133-137. doi: 10.7668/hbnxb.2009.01.030.