大白菜萝卜胞质雄性不育系RC_7单株产种量构成因素分析

Correlation Studies on Seed Yield Cytoplasmic Male-sterile (CMS) of Chinese Cabbage RC_7

应用线性回归和相关分析的方法,研究了新育成的大白菜萝卜胞质雄性不育系RC7的单株产量构成因素及其相关性,研究结果表明:不育系RC7的单株有效角果数(r=0.96583**)、二级分枝数(r=0.96419**)、每果粒数(r=0.75701**)、主花序有效角果数(r=0.49024*)及主花序有效长度(r=0.40623*)与单株产种量之间存在极显著或显著的正相关关系。在此基础上,建立了不育系RC7及其保持系单株种子产量的多元线性回归方程。在利用该不育系制种过程中,栽培管理上应以增加分枝数,尤其是二级分枝数,作为高产的主攻方向。

Yield form factors and correlation on Chinese cabbage RC7 and remainder B7 were studied through application of linear regression and correlated analysis ways. Results of correlated analysis showed： the pod number of single plant of sterile tine RC7（r=0.96583^＊＊）, second branch number（r=0.96419^＊＊）, seed number per pod （r=0.75701^＊＊）, pod number on main inflorescence （r=0.49024^＊）, main inflorescence （r= 0.40623^＊） and single yield exists quite remarkable or remarkable positive correlation. Then multivariate linear regression equations about form factors of single plant seed yield between remainder B7 and Chinese cabbage sterile line were set up. Increase branch number especially second branch number is the major method to get high yield in seed production.