Analysis on Breeding Characteristics and Character Evolution of Semi-winter Wheat Varieties in He'nan Province in Recent Ten Years
In order to systematically understand the breeding characteristics and character evolution of semi-winter wheat varieties in He'nan Province,181 semi-winter varieties(Dongshui group,Qiangjin group and Scab-resistant group)approved in He'nan Province from 2011 to 2020 were analyzed for their parental origin,main yield traits,quality traits and disease resistance,and summarized its evo-lution trend.The results showed that in recent ten years,96.7%of the semi-winter wheat varieties were developed in He'nan Province,of which 70.7%were single-cross varieties and 26.0%were multi-ple-cross varieties.The parents were Zhoumai 16,AIKANG58,Zhoumai22,Zhoumai18 and Zhoumai13.There were 126 cultivars(69.6%)and 31 cultivars(17.1%)from other provinces as par-ents.The variation coefficients of yield,plant height,effective panicle,grain number per ear and 1000-grain weight were 6.08%,4.41%,5.38%,6.41%and 7.41%,respectively,all less than 10%.The results of linear fitting showed that the yield increase rate of approved semi-winter wheat varieties in He'nan Province was 0.2%higher than that of Zhoumai18 in recent ten years.Quality traits:the variation coefficient of dough stability time was as high as 76.33%,and the variation coefficient of protein,wet gluten content and water absorption were less than 10.0%.Resistance to powdery mil-dew(17.68%),stripe rust(34.81%),highly resistant(8.29%),highly susceptible(1.66%),and moderately susceptible(73.48%).The resistant varieties to leaf rust and sheath blight were 4.4%and 8.3%,respectively,and the susceptible varieties to scab were 94.48%.
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