%A CUI Jia-Cheng,LIU Jia,MEI De-Sheng,LI Yun-Chang,FU Li,PENG Peng-Fei,WANG Jun,HU Qiong %T Genetic and Correlation Analysis on Pod Shattering Traits in Brassica napus L. %0 Journal Article %D 2013 %J Acta Agronomica Sinica %R 10.3724/SP.J.1006.2013.01791 %P 1791-1798 %V 39 %N 10 %U {https://zwxb.chinacrops.org/CN/abstract/article_5488.shtml} %8 2013-10-12 %X
Pod shattering resistance is a very important trait of oilseed rape, and the genetic research has been extremely weak. In this study, pod shattering resistance index (SRI) and other seven pod traits were analyzed based on data collected from a 6×5 incomplete diallel design at two environments. The results demonstrated that obvious genetic variation existed among elite breeding lines and their crosses for pod SRI. Pod shattering resistance was likely controlled by few genes with mainly additive effects, and dominant effects were much less important, whereas the environments played only minor role for pod SRI. There was no significant heterosis in most of the crosses. Pod SRI was detected to be significantly positively correlated with pod length, pod wall weight, 1000-seed weight and seed diameter, but negatively correlated with pod density and number of seeds per pod. The genetic variations of pod length, 1000-seed weight, pod density and seed diameter were mainly explained by additive effects, whereas those of pod wall weight and number of seeds per pod were mainly affected by dominant effects. Among the 11 elite breeding lines, ZS11B and R11 were recommended for using as direct parental lines for making pod shattering resistant cross varieties as maintainer and restorer of lines for Polima cytoplasmic male sterility system, respectively, due to their higher general combining ability on pod SRI and other yield component traits.