Fixation of the heterosis of F,generation is the strategic goal and development direction of hybrid rice breeding,and apomixis is the most possible way to fix heterosis.In this study,the autonomous embryonic gene BBM1 was driven by constitutive promoter Ubiq.Through flow cytometry ploidy detection and gene chip analysis,haploid plants were found in T1 strains.Subsequently,the BBM1 gene expression box was driven by the egg-specific promoter AtDD45 and constructed into the gene editing vectors of PAIR1,REC8 and OSD1(MiMe).Cloned seeds were obtained,and the induction rate was as high as 95.24%.This study provides a reference for the application of apomixis technology system in rice.
关键词
水稻/杂种优势固定/BBM1基因/无融合生殖/克隆种子/诱导率
Key words
rice/fixation of heterosis/BBM1 gene/apomixis/clone seed/induction rate