谷子杂交种与亲本性状的遗传相关性  

Genetic Correlation Coefficients of Foxtail Millet Traits Between Parents and Hybrids

作　　者：李会霞[1] 田岗[1] 王玉文[1] 刘鑫[1] 刘红[1] LI HuiXia;TIAN Gang;WANG YuWen;LIU Xin;LIU Hong(Millet Research Institute,Shanxi Academy of Agricultural Sciences,Changzhi 046011,Shanxi)

机构地区：[1]山西省农业科学院谷子研究所

出　　处：《中国农业科学》2020年第2期239-246,共8页Scientia Agricultura Sinica

基　　金：山西省重点研发计划重点项目（201703D211002-6,201703D211008,201803D221019-3）;山西省农业科学院育种工程项目（17yzgc026-1）、山西省农业科学院创新项目（YCX2018414,YCX2019T05）、山西省农业科学院农业科技创新工程（YGC2019KQ01）；；国家谷子高粱产业技术体系（CARS-06-13.5-A23）

摘　　要：【目的】探讨谷子杂交种与亲本性状间的遗传相关性,为筛选亲本材料、组配优异杂交种提供理论依据。【方法】用6个谷子高度雄性不育系和10个抗拿捕净除草剂恢复系组配60个组合,2017年种植60个杂交组合及其亲本,通过农艺性状和产量的初步鉴定和统计分析,从中筛选出用4个母本(谷3A、晋29A、51A和910A)、7个父本(K34、M22、K650、K154、K410、K391和K47)组配的7个优势组合。2018年种植7个优势组合及其亲本,测定其10个农艺和产量性状(分蘖数、株高、穗茎长、穗长、穗粗、穗重、粒重、千粒重、出苗至抽穗的天数和小区产量),对杂交种与亲本在相同性状上进行遗传相关分析,并对父母本各性状与杂交种产量性状(穗重、穗粒重)进行遗传相关分析。【结果】杂交种在穗茎长、抽穗期上有超亲优势,在穗长上超亲优势明显;杂交种与亲本的相关分析表明,杂交种与母本在株高、抽穗期、穗长等性状上存在显著的正相关关系,据2018年分析遗传相关系数分别为0.8841、0.9117和0.8263,前两项达极显著水平;杂交种与父本在分蘖数、株高、穗茎长、穗粗、千粒重等性状上存在显著的正相关关系,据2018年分析遗传相关系数分别为0.8267、0.9618、0.8234、0.7770和0.8404,其中在株高上达极显著水平;母本的分蘖数、株高、抽穗期与杂交种的单株穗重、穗粒重存在显著的正相关关系,其中与单株穗重的相关系数分别为0.3327、0.5439和0.4436,与单株穗粒重的相关系数分别为0.4238、0.4642和0.3487,母本的穗长与杂交种的单株穗粒重存在显著的相关关系,相关系数为0.3698;父本的分蘖数、株高、抽穗期和穗粗与杂交种的单株穗重、穗粒重存在显著的正相关关系,其中与单株穗重的相关系数分别为0.4986、0.4598、0.3367和0.5348,与单株穗粒重的相关系数分别为0.5568、0.4253、0.3659和0.4236,父本分蘖数与杂交种单株【Objective】 Genetic correlation of millet traits between hybrids and parents was studied in order to select parental materials on purpose and provide theoretical basis for optimizing the grouping of hybrid. 【Method】 Six highly-male-sterile lines were hybridized with ten sethoxydim resistant restorer lines, and sixty hybrids were obtained. These hybrids were planted with their parents in 2017. By evaluating their agronomic traits through statistical analysis, 7 advantageous combinations with their 4 female parents(Gu 3 A, Jin 29 A, 51 A and 910 A) and 7 male parents(K34, M22, K650, K154, K410, K391 and K47) were screened to plant in 2018. 10 agronomic and yield traits of them were surveyed. They were tiller number, plant height, panicle stem length, panicle length, panicle diameter, panicle weight, panicle grain weight, thousand seed weight, days to heading and plot yield. Genetic correlation had been analyzed between millet parents and hybrids in the same traits. And genetic correlation between parents traits and hybrids yield traits(panicle weight and panicle grain weight) had also been analyzed.【Result】The hybrids had some heterobeltiosis in two traits of panicle stem length and heading period, and had distinctly heterobeltiosis in trait of panicle length. Correlation analysis of hybrids and parents in two years indicated the following results. There were significant positive correlations in terms of plant height, heading period and panicle length between hybrids and their females. According to the analysis in 2018, the genetic correlation coefficients were 0.8841, 0.9117 and 0.8263, respectively. The first two items reached extremely significant level. There were significantly positive correlations between hybrids and their males in tiller number, plant height, panicle stem length, panicle diameter and thousand seed weight. According to the analysis in 2018, the genetic correlation coefficients were 0.8267, 0.9618, 0.8234, 0.7770 and 0.8404. Among them, the correlation of plant height was extremely

关 键 词：谷子 亲本 杂交种 遗传相关性 

分 类 号：S515[农业科学—作物学]