杂交稻外观品质性状的遗传控制  

Genetic analysis for appearance quality characters in indica hybrid rice

作　　者：方平平[1] 林荔辉[1] 李维明[1] 吴为人[1] 潘国亮[1] 

机构地区：[1]福建农林大学作物科学学院,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2004年第2期137-140,共4页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：福建省青年人才创新基金(2001J045);福建省教育厅(K2001061)资助项目.

摘　　要：采用双列杂交设计,研究不育系和恢复系(各5个)均为优质背景下,杂交稻外观品质性状的遗传,结果表明:杂种稻米外观品质主要受遗传控制,遗传效应可解释表型方差的64%以上,且遗传效应均以加性效应为主.其中,透明度母体加性效应(VAm)占绝对优势;米粒长、长宽比、垩白率和垩白度则以种子直接(胚乳)加性效应(VA)为主.与遗传效应相比,基因型×环境互作效应则小得多.其中,垩白率、垩白度、透明度3性状的互作方差(VGE)占表型方差比重较大,分别达到35.1%、31.3%和27.1%.因此,这些性状对环境较敏感,但不同基因型的敏感程度不同.Five CMS and five restorer lines were used to make incomplete diallel crosses to investigate the inheritance of 5 appearance characters, including kernel length (KL), length/breadth ratio (LBR), chalky rice percentage (CR),chalky score (CS) and kernel translucency (KT), in high quality indica hybrid rice. The results presented as follows: (1) The genetic variation (V_G) for each of 6 characters accounted for more than 64% of phenotype variation,indicating that all of appearance quality were mainly controlled by genetic effect.(2) The genetic effects of all characters were mainly attributable to maternal additive(V_(Am))and direct additive (V_A), with maternal additive effect predominating for KT,while direct additive effect dominating for KL, LBR, CR and CS. (3) Among 5 characters,the genotype×environment effect (V_(GE)) for CR, CS and KT was higher, which accounted for 35.1%, 31.3% and 27.1% of phenotype variation respectively.

关 键 词：杂交 水稻 外观品质 性状 遗传 基因型 

分 类 号：S511.03[农业科学—作物学]