水稻穗部性状的QTL与环境互作分析  

Analysis of QTL×Environment Interaction for Rice Panicle Characteristics

作　　者：邢永忠[1] 徐才国[1] 华金平[1] 谈移芳[1] 

机构地区：[1]华中农业大学作物遗传改良国家重点实验室,武汉430070

出　　处：《Acta Genetica Sinica》2001年第5期439-446,共8页

基　　金：国家自然科学基金重大项目!(No.39893350);洛克菲勒基金资助项目

摘　　要：分别在两年收集珍汕９７／明恢６３的重组自交系群体的表现型数据，运用混合线性模型的ＱＴＬ定位方法，联合分析穗部５个性状的ＱＴＬｓ ７及ＱＴＬ与环境互作关系。每穗颖花数、每穗实粒数、结实率、穗长和穗着粒密度分别检测到１０、３、６、８和７个ＱＴＬｓ分别解释各性状变异的 ２９．１３％、 １９．２％、２９．４６％、２６．３９％和 ３５．７６％。对于同一性状，高值亲本和低值亲本中均存在增效和减效ＱＴＬ。相关性状ＱＴＬ的位置表现相同或相似，成簇分布。１个穗长ＱＴＬ，２个每穗颖花数ＱＴＬｓ，３个结实率ＱＴＬｓ表现与环境显著互作，ＱＴＬ与环境互作效应的贡献率比相应的ＱＴＬ贡献率略大。遗传力稍高的每穗实粒数和穗着粒密度的 ＱＴＬ与环境不互作。The development of molecular genetic linkage map has accelerated the identification and mapping of genomics regions controlling quantitative trait loci. A recombinant inbred line population derived from Zhenshan 97 /Minghui 63 was grown in two years. Mixed linear model approach was used to jointly identify QTLs and QTL× environment interactions for five panicle characteristics. Ten, three, six, eight and seven QTLs were detected for spiketets per panicle, grains per panicle, seed setting, panilce length and panicle setting density, respectively. They collectively explained 29.13%, 19.2%, 29.46%, 26.39% and 35.76% of phenotypic variations for these traits, respectively. For the five traits, QTLs with increasing effects and decreasing effects could be simultaneously identified in high value parent and low value parent. QTLs for correlative traits clustering located in the similar regions. One QTL for panicle length, two QTLs for spikelets per panicle and three QTLs for seed setting performed significant interactions with environment. The contributions from interactions were slightly larger than that from the QTLs involved in the interactions. No QTL× environment interaction was detected for traits with high heritabilities such, as grains per panicle and panicle setting density.

关 键 词：水稻 数量性状基因 混合线性模型 穗部性状 QTL 环境 互作 

分 类 号：Q943[生物学—植物学]