棉花杂交后代表型性状遗传分析  

Analysis of Representative Genetic Traits in Cotton after Crossing

作　　者：任丹 黄雅婕 崔进鑫 庞博 高文伟[1] REN Dan;HUANG Yajie;CUI Jinxin;PANG Bo;GAO Wenwei(Cotton Engineering Research Center,Ministry of Education/College of Agronomy,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]新疆农业大学农学院/棉花教育部工程研究中心,乌鲁木齐830052

出　　处：《新疆农业科学》2022年第10期2358-2364,共7页Xinjiang Agricultural Sciences

基　　金：国家自然科学基金(31660406)。

摘　　要：【目的】亲本相同的陆地棉与海岛棉正、反杂交,分析杂交后代群体农艺性状的遗传变异并筛选优异单株,为田间早期选育遗传稳定的农艺性状提供参考。【方法】以陆地棉TM-1和海岛棉新海16号的杂交种F_(2)分离群体为材料,对株高、始节高、始节数、果枝数、有效果枝数、铃数、有效铃数、单铃重、衣分进行变异系数、相关性分析、主成分分析比较。【结果】海陆群体中铃数(0.51%)和有效铃数(0.47%)变异系数最高。在陆海群体中铃数(0.50%)和有效铃数(0.50%)变异系数最高。正交群体和反交群体中各个农艺性状之间都有显著或极显著的相关性。在主成分分析中特征值较高的第一主成分中,海陆群体里值最高的是果枝数(0.878)和有效果枝数(0.895),在陆海群体中值最高的是果枝数(0.82)和有效果枝数(0.819)。【结论】在海陆杂交后代的群体中正交和反交群体之间农艺性状没有明显的差异。后代群体中铃数和有效铃数变异范围广,各个性状之间相关性显著。果枝数与有效果枝数贡献率较高,将果枝数、铃数、有效铃数、有效果枝数作为早期育种单株筛选的主要性状,筛选出40个性状优良的单株。【Objective】The aim of this study is to study the direct and inverse crosses between upland cotton and Sea Island Cotton with the same parents,and with a view to provide providing reference for early breeding of stable agronomic traits in the field by studying the genetic variation of agronomic traits in the progenies and selecting excellent individuals.【Method】The F_(2) segregation population of Upland Cotton TM-1 and Sea Island Cotton Xinhai 16 were used as materials.Then the variation coefficient,correlation analysis and principal component analysis of plant height,first node height,first node number,fruit branch number,effective branch number,boll number,effective boll number,single boll weight and lint percentage were compared.【Result】the coefficient of variation(CV)of reciprocal cross and reciprocal cross was analyzed.It was found that the coefficient of variation(CV)of boll number(0.51%)and effective boll number(0.47%)was the highest in the sea land population.The coefficients of variation of boll number(0.50%)and effective boll number(0.50%)were the highest in land and sea populations.In the analysis of population correlation,there were significant or extremely significant correlations between agronomic traits in the orthogonal population and the backcross population.In the first principal component analysis with higher eigenvalue,the highest number of fruit branches(0.878)and effective branches(0.895)were found in the sea land population,and the highest number of fruit branches(0.82)and effective branches(0.819)were observed in the land sea population.【Conclusion】There was no significant difference in agronomic traits between the direct and inverse crosses.The variation range of boll number and effective boll number in progeny population is wide,and the correlation between each character is significant.In principal component analysis,the contribution rate of fruit branch number and effective branch number is higher,so the fruit branch number,boll number,effective boll number and effective

关 键 词：棉花杂交 农艺性状 相关性 主成分 

分 类 号：S-3[农业科学] S562