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Coleoptile Purple Line Regulated by A-P Gene System Is a Valuable marker trait for Seed Purity Identification in Hybrid Rice

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Rice science 2022年第5期29卷 451-461,I0019-I0031页

作者： DU Shuanglin WANG Zhongwei CHEN Yun TAN Yao LI Xiang ZHU Wenping HE Guanghua LEI Kairong GUO Longbiao ZHANG Yi State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan/Research Center for Perennial Rice Engineering and Technology in Yunnan/School of Agriculture Yunnan UniversityKunming 650091China Biotechnology Research Institute Chongqing Academy of Agricultural SciencesChongqing 401329China Key Laboratory of Application and Safety Control of Genetically Modified Crops/Rice Research Institute Academy of Agricultural SciencesSouthwest UniversityChongqing 400715China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China

In plants,a large number of anthocyanin biosynthetic genes encoding enzymes and regulatory genes encoding transcription factors are required for anthocyanin *** purple lines are two purple lines on both sides of coleoptiles after seed ***,the molecular mechanism of coleoptile purple line is not clear in rice so *** this study,two major dominant genes,coleoptile purple line 1(OsCPL1,also known as OsC1)and coleoptile purple line 2(OsCPL2),were isolated via map-based cloning,and both of them were required for anthocyanin biosynthesis of coleoptile purple line in *** knockout and complementation experiments confirmed that OsC1 was required for purple color in most organs,such as coleoptile line,sheath,auricle,stigma and apiculus,whereas OsCPL2 was just required for coleoptile purple ***1 was predominantly expressed in coleoptiles,flag leaves,and green panicles,and highly expressed in young leaves,whereas OsCPL2 was predominantly expressed in coleoptiles,and extremely lowly expressed in the other tested ***-of-function of either OsC1 or OsCPL2 resulted in significant reduction of transcript levels of multiple anthocyanin biosynthesis genes in *** purple line was further used as a marker trait in hybrid *** identification in hybrid rice seeds via coleoptile purple line just needed a little water,soil and a small plate and could be completed within 5 *** marker and field identification analyses indicated that coleoptile purple line was reliable for the hybrid seed purity *** findings disclosed that coleoptile purple line in rice was regulated by two major dominant genes,OsC1 and OsCPL2,and can be used as a simple,rapid,accurate and economic marker trait for seed purity identification in hybrid rice.

关键词： OsC1 OsCPL2 coleoptile purple line anthocyanin seed purity identification marker trait

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