花生学报2019，Vol.48Issue(2)：1-9,9.DOI:10.14001/j.issn.1002-4093.2019.02.001
基于高密度遗传图谱定位栽培种花生主茎高、第一侧枝长和分枝数的QTL研究
QTL Mapping for Main Stem Height, First Branch Length and Branch Number Based on a High-Density Linkage Map in Peanut (Arachis hypogaea L.)
摘要
Abstract
The genetic basis for plant architecture traits in peanut (Arachis hypogaea L.) is poorly understood.This study characterized quantitative trait loci (QTLs) underlying peanut main stem height (MSH),first branch length (FBL) and branch number (BN),using a high-density genetic linkage map in a recombinant inbred line (RIL) population derived from Huayu28 and P76.The map consists of 2266 SNPs and 68 SSRs covering a genetic distance of 2586.37 cM.The average distance between adjacent markers was 2.25 cM.A positive correlation was found between MSH and BN (r =0.354),FBL (r=0.854).QTL analysis showed 18 additive QTLs (four MSH,five FBL,and nine BN) mapped to 10 chromosomes.While most QTLs were identified in only one environment,qMSHA01.1 for MSH,qFBLA01.2 for FBL,qBNB07.1 and qBNB07.2 for BN were in two environments.Besides,24 pairs of epistatic QTLs were identified for MSH,FBL,and BN;all of which accounted for phenotypic variation explained (PVE) less than 10％.These results provide a foundation for fine mapping and cloning of genes affecting plant architecture and the design of molecular breeding in peanut.关键词
侧枝数/上位性效应/第一侧枝长/主茎高/花生/数量性状位点/单核苷酸多态标记/简单重复序列标记Key words
branch number/epistatic effects/first branch length/main stem height/peanut/QTL/SNP/SSR分类
农业科技引用本文复制引用
张胜忠,陈静,邱俊兰,苗华荣,杨伟强,赵立波,宋欣,潘丽娟,张智猛,胡晓辉..基于高密度遗传图谱定位栽培种花生主茎高、第一侧枝长和分枝数的QTL研究[J].花生学报,2019,48(2):1-9,9.基金项目
山东省农业良种工程(2017LZGC003) （2017LZGC003）
山东省农业科学院创新工程(CXGC2016B02,CXGC2018E21) （CXGC2016B02,CXGC2018E21）
山东省重点研发计划(2016ZDJS10A02) （2016ZDJS10A02）
山东省农业科学院重大成果培育 （）
山东省农业科学院英才计划 （）
山东省渤海粮仓科技示范工程(2017BHLC019) （2017BHLC019）
