作物学报2025，Vol.51Issue(5)：1261-1276,16.DOI:10.3724/SP.J.1006.2025.41064
小麦新品种西农877高产稳产的遗传特性解析
Genetic analysis of high yield and yield stability characteristics of new wheat variety Xinong 877
摘要
Abstract
Xinong 877 is a newly developed wheat variety bred by Northwest A&F University,characterized by wide adaptability,high yield,and yield stability.This study aims to elucidate the genetic basis of Xinong 877's high yield,adaptability,and compre-hensive resistance,thereby providing theoretical foundations and methodological guidance for the breeding of new wheat varieties.Field experiments were conducted to analyze the grain filling characteristics and photosynthetic traits of Xinong 877,along with several high-yielding wheat varieties from the Huanghuai wheat region.A combined approach utilizing a 16K SNP background chip and a 0.1K SNP functional chip was employed to thoroughly dissect the genetic foundation of Xinong 877 and identify the genetic effects of key chromosomal regions.The results showed that,Xinong 877 exhibited superior grain filling characteristics,including an extended grain filling duration,optimal allocation across various grain filling stages,and a high grain filling rate.Addi-tionally,its flag leaves possessed elevated chlorophyll content and enhanced photosynthetic capacity.In regional trials,the average thousand-grain weight was 48.60 g,and in field trials,it reached 50.05 g,both surpassing the control variety Zhoumai 36 and demon-strating good stability.These traits establish a foundation for realizing high yield potential.In multi-location regional trials,Xinong 877 achieved an average stability coefficient of 89.15,significantly higher than that of Zhoumai 36.Regarding genetic composition,Xinong 805a,as the female parent,contributed 80.23 percent of the genetic makeup to Xinong 877,the highest among the three par-ent lines.Additionally,Xinong 877 incorporated multiple superior genes/QTLs from its parents,including stripe rust resistance loci QYrqin.nwafu-6BS,QYrsn.nwafu-1BL,QYrxn.nwafu-1BL,Yr29,and Yr78;fusarium head blight resistance loci QFhb.caas-5AL and QFhb.hbaas-5AL;leaf rust resistance loci Lr13 and Lr68;as well as yield-related loci such as grain weight genes TaT6P and TaGS5-A1,and grain size gene QGl-4A.Xinong 877 exhibits significant yield potential and wide adaptability in field production.There are notable differences in the genetic contributions from the parent lines,with Xinong 805a providing the highest genetic con-tribution.The aggregation of multiple key genes/QTLs related to important traits in Xinong 877 offers valuable genetic resources and theoretical support for the development of high-yield,broadly adaptable wheat varieties in the Huanghuai wheat region.关键词
西农877/高产潜力/广泛适应性/抗病性/小麦SNP芯片/遗传构成Key words
Xinong 877/high yield potential/wide adaptability/disease resistance/wheat SNP Array/genetic structure引用本文复制引用
孟祥宇,李春莲,曾庆东,韩德俊,郑炜君,刁邓超,刘雅睿,李云丽,孙玉晨,吴玮,赵雯,汪妤,吴建辉..小麦新品种西农877高产稳产的遗传特性解析[J].作物学报,2025,51(5):1261-1276,16.基金项目
本研究由陕西省科技厅重点产业创新链项目(2024NC-ZDCYL-01-02)和科技创新重大专项基金项目(2023ZD04026)资助. This study was supported by the Shaanxi Provincial Department of Science and Technology Key Industry Innovation Chain Project(2024NC-ZDCYL-01-02)and the Major Science and Technology Innovation 2030 Project Fund(2023ZD04026). （2024NC-ZDCYL-01-02）
