基于贵州地区玉米DUS测试数量性状变异与分级标准研究  

Study on Quantitative Trait Variation and Grading Standard of Maize by DUS Test in Guizhou Region

作　　者：李娟 孔德章 焦爱霞 周欢欢[1] 韦启迪 张丽娜 霍可以 LI Juan;KONG Dezhang;JIAO Aixia;ZHOU Huanhuan;WEI Qidi;ZHANG Lina;HUO Keyi(Guiyang Station for DUS Testing Center of New Plant Varieties,MARA,P.R.China,Guiyang 550006,China;Institute of Crop Germplasm Resources,Guizhou Academy of Agricultural Sciences,Guiyang 550006,China)

机构地区：[1]农业农村部植物新品种测试(贵阳)分中心,贵阳550006 [2]贵州省农业科学院农作物品种资源研究所,贵阳550006

出　　处：《种子》2021年第10期34-40,共7页Seed

基　　金：贵州省农业科学院青年基金“黔桂山区玉米品种DUS测试操作手册研制及标准品种鉴选”[黔农科院青年基金(2017)05号];农业农村部物种品种资源保护费项目“物种品种资源保护费”[111721301354052309][111821301354052267]。

摘　　要：科学进行数量性状分级对玉米DUS测试中品种描述与特异性判定意义重大。通过对2018—2019年272份玉米杂交种DUS测试数量性状进行个体测量,针对贵州地区玉米DUS测试数量性状变异情况进行统计,根据K-S检验分析各性状数据的分布规律,并对各数量性状进行分级与相关性分析。结果表明,雄穗一级侧枝数目与植株穗位高度在贵州地区变异系数较大,果穗直径变异系数最小;12个性状均呈现正态分布或近似正态分布,按极差大于等于2倍LSD 0.05分级规则进行等距划分;雄穗最高位侧枝以上主轴长度与雄穗侧枝长度、雄穗最低位侧枝以上主轴长度的相关性均较高,为减少工作量,可将雄穗最高位侧枝以上主轴长度性状去除,保留雄穗侧枝长度、雄穗最低位侧枝以上主轴长度性状。Scientific classification of quantitative traits is of great significance to variety description and specificity determination in maize DUS test.By individual measurement of DUS quantitative traits in 272 maize hybrids from 2018 to 2019,the variation of DUS quantitative traits in maize in Guizhou was statistically analyzed.The distribution law of each trait was analyzed based on K-S test,and the classification and correlation analysis of each quantitative trait were also conducted.The results showed that the variation coefficient of the number of the primary lateral branch of tassel and ear height of plant was larger in Guizhou area,while the variation coefficient of fruit cluster diameter was the smallest.The 12 traits showed normal distribution or nearly normal distribution,and isometric division was further performed according to the classification rule of range greater than or equal to 2 folds LSD 0.05.The correlation between the length of the main axis above the branch of the highest position of tassel and the lateral branch length of tassel or the length of the main axis above the branch of the lowest position of tassel was high.To reduce the workload,the traits of main shaft length above the highest branch and the lowest branch of tassel could be removed,and the traits of main shaft length above the lowest branch of tassel could be retained.

关 键 词：玉米 DUS测试 数量性状 数量性状分级 相关分析 

分 类 号：S513[农业科学—作物学]