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当前位置: 首页 > 文章 > Co-silencing E1 and its homologs in an extremely late-maturing soybean cultivar confers super-early maturity and adaptation to high-latitude short-season regions 农业科学学报 (英文) 2022,21 (2)
Position: Home > Articles > Co-silencing E1 and its homologs in an extremely late-maturing soybean cultivar confers super-early maturity and adaptation to high-latitude short-season regions Journal of Integrative Agriculture 2022,21 (2)

Co-silencing E1 and its homologs in an extremely late-maturing soybean cultivar confers super-early maturity and adaptation to high-latitude short-season regions

作  者：
Liu Li-feng;Gao Le;Zhang Li-xin;Cai Yu-peng;Song Wen-wen;Chen Li;Yuan Shan;Wu Ting-ting;Jiang Bing-jun;Sun Shi;Wu Cun-xiang;Hou Wen-sheng;Han Tian-fu
单  位：
China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China;Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Key Lab Soybean Biol Beijing, Inst Crop Sci, Beijing 100081, Peoples R China
关键词：
soybean;RNA interference;E1;E1La;b;flowering time
摘  要：
Soybean (Glycine max (L.) Merr.), a typical short-day plant, is sensitive to photoperiod, which limits the geographical range for its cultivation. In the flowering pathway regulated by photoperiod, E1, a flowering inhibitor in soybean, plays the dominant role in flowering time regulation. Two E1 homologs, E1-like-a (E1La) and E1-like-b (E1Lb), play overlapping or redundant roles in conjunction with E1. In the present study, E1 and E1La/b were simultaneously silenced via RNA interference (RNAi) in Zigongdongdou (ZGDD), an extremely late-flowering soybean landrace from southern China. As a result, RNAi lines showed a much earlier-flowering phenotype and obvious photoperiod insensitivity compared with wild-type (WT) plants. In RNAi transgenic plants, the expression levels of flowering inhibitor GmFT4 and flowering promoters GmFT2a/GmFT5a were significantly down- and up-regulated, respectively. Further, the maturity group (MG) of the RNAi lines was reduced from WT ZGDD's MG VIII (extremely late-maturity) to MG 000 (super-early maturity), which can even grow in the northernmost village of China located at a latitude of 53.5 degrees N. Our study confirms that E1 and E1La/b can negatively regulate flowering time in soybean. The RNAi lines generated in this study, with early flowering and maturity traits, can serve as valuable materials and a technical foundation for breeding soybeans that are adapted to high-latitude short-season regions.

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