Molecular Identification and Comparison of Horticultural Characters of Homonuclear-allocytoplasm Cytoplasmic Male Sterile Line in Orange Chinese Cabbage
WANG Ruofan,MA Shuai,CHEN Lin,LU Qianqian,MENG Yan,ZHANG Lugang*
State Key Laboratory of Crop Stress Biology for Arid Areas,College of Horticulture,Northwest A & F University,Yangling 712100,Shaanxi,China
Abstract:Taking a pair of homonuclear-allocytoplasm cytoplasmic male sterile(ha-CMS)lines of orange Chinese cabbage and their maintainer lines as material,this experiment carried out studies on cytoplasmic sterility genes,genetic diversity identification,observation and comparison of horticultural characters.Results of molecular identification indicated that‘18C5’carried orf138 sterility gene,‘18C6’carried orf138 and orf222 sterility genes at the same time;the genetic similarity coefficients of‘18C5’,‘18C6’and their maintainer lines were 91.11% and 93.76%,respectively.Results of horticultural characters observation showed that the similarities of 2 male sterile lines and maintainer lines were different.The similarity between‘18C5’and‘15S1094’was higher at rosette stage,and similarity between‘18C6’and‘15S1094’was higher at maturation period.The single plant weight and single head weight of these 2 ha-CMS lines were all larger than that of the maintainer line,showing certain superiority.The observation at flowering period showed that the buds of these 2 ha-CMS lines‘18C5’and‘18C6’were all abortive under low temperature in early flowering stage.But,the flowering was normal in middle and late stages.The flower colors of the male sterile line and maintainer line were the same.The stamen,filament length of‘18C5’and‘18BC6’were extremely significant smaller than that of the maintainer line.The anthers of the 2 ha-CMS lines were shriveled and degenerated.They were all sterile without pollen.The nectary of the 2 ha-CMS lines were normal.They could attract bees to pollinate and produce seeds normally.
王若凡,马帅,陈霖,卢倩倩,孟艳,张鲁刚. 橙色大白菜同核异质细胞质雄性不育系的分子鉴定与园艺性状比较[J]. 中国蔬菜, 2021, 1(2): 58-63.
WANG Ruofan,MA Shuai,CHEN Lin,LU Qianqian,MENG Yan,ZHANG Lugang. Molecular Identification and Comparison of Horticultural Characters of Homonuclear-allocytoplasm Cytoplasmic Male Sterile Line in Orange Chinese Cabbage. China Vegetables, 2021, 1(2): 58-63.