华南农业大学学报2018，Vol.39Issue(1)：20-26,7.
苦荞重组自交系群体农艺性状分析
Analysis of agronomic traits in recombinant inbred line population of tartary buckwheat (Fagopyrm tataricum)
摘要
Abstract
[Objective]To study the genetic variation in major agronomic traits of tartary buckwheat (Fagopyrm tataricum), reveal the major factors influencing grain weight per plant, select excellent lines, and provide a theoretical basis and materials for high-yield tartary buckwheat breeding.[Method]Using 399 recombinant inbred lines (RILs) derived from the cross of 'Xiaomiqiao' and 'Jinqiao2', we studied the genetic variations of eight agronomic traits including plant height (PH), branch number of main stem (BN), branch number with double-bifurcation on main inflorescence (BND), grain number of the top-three-branch (GNT), grain number per plant (GN), grain weight per plant (GW), 1000-grain weight (TGW) and grain yield (GY) and did correlation analysis. Multiple regression and path analysis were conducted to detect the traits mostly affected GW. Cluster analysis for the RIL population was carried out based on the phenotypic data of invested traits, and the excellent lines were selected by variance analysis among groups.[Result]The coefficient variation of the traits ranged from 13.1％ to 42.4％. Excepting BN, tremendous transgressive segregation for all traits was observed. PH, BND and GN were significantly positively correlated with GW and GY, respectively (P<0.01). GN, BND and TGW were the traits mostly affected GW. GN had the most direct and overall effects on GW. The RIL population could be divided into ten groups at the Euclidean distance of 22.0. Group C5 had the highest GY and group C1 had fine performance in GW, GN, BND and GY.[Conclusion]GN can be used as a reference index for high-yield tartary buckwheat breeding, and lines from group C1 and C5 are recommended as materials for breeding.关键词
苦荞/重组自交系/农艺性状/相关分析/通径分析/遗传变异Key words
Fagopyrm tataricum/recombinant inbred line/agronomic trait/correlation analysis/path analysis/genetic variation分类
农业科技引用本文复制引用
石桃雄,黎瑞源,梁龙兵,朱丽伟,孟子烨,陈庆富..苦荞重组自交系群体农艺性状分析[J].华南农业大学学报,2018,39(1):20-26,7.基金项目
国家现代农业产业体系荞麦育种岗位科学家专项资金(CARS-08-A4) （CARS-08-A4）
国家自然科学基金(31460280) （31460280）
贵州省荞麦工程技术研究中心建设专项资金(黔科合农G字[2015]4003) （黔科合农G字[2015]4003）
贵州省科技厅科学技术基金(黔科合JZ字[2014]2011号) （黔科合JZ字[2014]2011号）
