Identification of compact germplasm resources suitable for high density cultivation in Brassica napus L.  

作　　者：Wenxiang Wang Qiong Hu Desheng Mei Jun Wang Hongtao Cheng Hui Wang Li Fu Jia Liu 

机构地区：[1]Key Laboratory of Biology and Genetic Improvement of Oil Crops,Ministry of Agriculture,Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences

出　　处：《Oil Crop Science》2018年第1期33-41,共9页中国油料作物学报(英文版）

基　　金：supported by National Natural Science Foundation of China(No.31471535, 31771842);the Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences(Group No.118);the Earmarked Fund for China Agriculture Research System (CARS-13);Hubei Agricultural Science and Technology Innovation Center

摘　　要：Branch angle is an important plant architecture trait and is considerably important for the ideal plant architecture of high density cultivation of rapeseed. In this study,12 representative rapeseed lines were first measured for whole-plant branch angles using image processing technology. Top branch angle (TBA) and basal branch angle (BBA) were significantly different in each line in which TBA was greater than BBA. Then, 156 rapeseed germplasm lines were evaluated for TBA and BBA in main cultivated regions of the Yangtze River Basin (Zunyi; Wuhan; Lu'an). In these three environments, the TBA and BBA of the rapeseed germplasm sources varied, in which ranges of 33.44°-73.17°and 18.73°-59.11°, 29.66°-61.91°and 22.32°-60.16°, and 28.47°-76.32°and 22.98°-72.68°, respectively. ANOVA showed that TBA and BBA were susceptible to environmental and had broadsense heritability (H2) values of 89.09%and 87.40%, respectively. Interactions of genotype by environment were also significant. There was diversity in branch angle among rapeseed genotypes. GGE biplot analysis showed that compact accession lines (Nilla, Purler and AV-SAPPHI) were the most desirable compact genotypes in all environments. Stability analysis showed that the genotype with the most minimum branch angle was stable for compact plant architecture.Branch angle is an important plant architecture trait and is considerably important for the ideal plant architecture of high density cultivation of rapeseed. In this study,12 representative rapeseed lines were first measured for whole-plant branch angles using image processing technology. Top branch angle (TBA) and basal branch angle (BBA) were significantly different in each line in which TBA was greater than BBA. Then, 156 rapeseed germplasm lines were evaluated for TBA and BBA in main cultivated regions of the Yangtze River Basin (Zunyi; Wuhan; Lu'an). In these three environments, the TBA and BBA of the rapeseed germplasm sources varied, in which ranges of 33.44°-73.17°and 18.73°-59.11°, 29.66°-61.91°and 22.32°-60.16°, and 28.47°-76.32°and 22.98°-72.68°, respectively. ANOVA showed that TBA and BBA were susceptible to environmental and had broadsense heritability (H2) values of 89.09%and 87.40%, respectively. Interactions of genotype by environment were also significant. There was diversity in branch angle among rapeseed genotypes. GGE biplot analysis showed that compact accession lines (Nilla, Purler and AV-SAPPHI) were the most desirable compact genotypes in all environments. Stability analysis showed that the genotype with the most minimum branch angle was stable for compact plant architecture.

关 键 词：RAPESEED branch angle GERMPLASM diversity COMPACT plant type GGE BIPLOT 

分 类 号：S[农业科学]