农业生物技术学报2025，Vol.33Issue(3)：486-497,12.DOI:10.3969/j.issn.1674-7968.2025.03.002
多环境下谷子株高、穗重和穗粒重遗传特性分析
Genetic Characteristics Analysis of Plant Height,Panicle Weight and Grain Weight of Foxtail Millet(Setaria italica)in Multiple Environments
摘要
Abstract
The primary objectives of high-yield breeding for foxtail millet(Setaria italica)encompass the optimization of plant height,enhancement of panicle weight,and augmentation of panicle grain weight.In order to investigate the genetic variation of plant height,panicle weight and panicle grain weight of foxtail millet,this study utilized'Aininghuang'as the maternal parent and'Jingu 21'as the paternal parent to established a recombinant inbred line(RIL)population,and the RIL population was cultivated at 7 locations over a span of 3 years(2019～2021)in Shanxi province,R-based software package SEA v2.0 was employed to analyze the main gene+multi-gene hybrid genetic model for RIL population traits such as plant height,panicle weight and grain weight.The results demonstrated significant correlations among plant height,panicle weight and grain weight,and the correlation coefficient between panicle weight and grain weight was 0.98(P≤0.001).The optimal model for plant height was determined to be PG-AI with the polygenic heritability of 97.56％;Similarly,the optimal model for panicle weight was identified as PG-A with the polygenic heritability of 84.04％,primarily influenced by additive effects resulting in an additive effect value of-2.95 indicating negative genetic impact;The most suitable model for grain weight was MX2-ED-A,which was controlled by 2 dominant epistatic major genes along with additive polygenes contributing to mixed inheritance pattern,with major gene heritability accounted for 62.53％and polygene contributed approximately 50.52％,the additive effect of the second major gene was dominant,and the additive epistatic interaction effect value was-11.50,showed a negative genetic effect.The optimal genetic models of plant height and panicle weight in foxtail millet were similar,exhibited a polygenic nature with substantial heritability and little environmental influence;In contrast,the inheritance of grain weight was primarily controlled by a combination of major gene effects and polygenic factors.This study offers valuable insights for the genetic enhancement and precise mapping of genes associated with plant height,panicle weight,and grain weight.关键词
谷子/多环境/主基因+多基因模型/遗传分析Key words
Foxtail millet/Multiple environments/Major gene+polygene model/Genetic analysis分类
农业科学引用本文复制引用
李颜方,刘燕,杜晓芬,王智兰,韩康妮,连世超,李禹欣,张林义,王军..多环境下谷子株高、穗重和穗粒重遗传特性分析[J].农业生物技术学报,2025,33(3):486-497,12.基金项目
国家重点研发计划(2018YFD1000700) （2018YFD1000700）
国家重要特色物种谷子育种联合攻关(NYGG19-2) （NYGG19-2）
山西省现代农业产业技术体系(2024CYJSTX04-01) （2024CYJSTX04-01）
山西省基础研究计划(202203021212453) （202203021212453）
