当前位置:首页>南京>南京农业大学国家大豆改良中心李艳教授团队发现改良大豆株型且提高产量和根瘤固氮能力的“一因多效”基因

南京农业大学国家大豆改良中心李艳教授团队发现改良大豆株型且提高产量和根瘤固氮能力的“一因多效”基因

  • 2026-02-17 11:20:47
南京农业大学国家大豆改良中心李艳教授团队发现改良大豆株型且提高产量和根瘤固氮能力的“一因多效”基因

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Soybean is a vital source of vegetable oil, protein, feed, and industrial raw materials, yet its yield remains considerably lower than that of major cereal crops. Unlike rice and wheat, which rely heavily on nitrogen fertilizers to promote tillering and enhance productivity, soybean acquires over 70% of its nitrogen through symbiotic nitrogen fixation. Tang et al. (pages 75–95) report that knockout of the gibberellin receptor gene GmGID1-2 boosts both soybean yield and nitrogen fixation—a dual benefit not observed in the semi-dwarf mutants of cereals. The cover image illustrates a GmGID1-2 knockout soybean plant (right) that, despite its shorter stature, exhibits increased branching, more pods and seeds, and ultimately higher yield compared to the wild type (left), alongside a root system with more nodules and greater capacity to fix nitrogen. The pleiotropic benefits of GmGID1-2 knockout alleles suggest a promising strategy for advancing sustainable soybean agriculture.

大豆是我国乃至全球重要的油料作物, 但其单产远低于水稻、小麦等作物。在谷类作物中第一轮绿色革命通过推广高密度种植抗倒伏的半矮秆品种提高了单位面积产量但这一方式依赖大量施用氮肥以实现高产; 新一轮绿色革命则将提高氮利用效率的基因整合到半矮秆品种中在不过度施用氮肥的同时保持其高产特性。与谷类作物不同大豆作为豆科植物可通过共生菌同化大气中的氮来满足自身70%以上的氮需求。因此挖掘既能改良株型、提高产量又能促进根瘤固氮的关键基因将有助于推动大豆实现可持续绿色革命。

近日JIPB在线发表了南京农业大学李艳教授团队题为"Editing a gibberellin receptor gene improves yield and nitrogen fixation in soybean" (https://doi.org/10.1111/jipb.70026的研究论文。该研究通过基因编辑技术敲除大豆赤霉素受体基因GmGID1-2实现对株型、产量、种子含油量以及根瘤固氮能力等多个性状的综合改良。创制的GmGID1-2新等位变异优于大豆种质资源中的自然等位基因为培育高产、高油、高固氮大豆品种提供了宝贵的遗传资源。

大豆基因组中共有5GmGID1基因其中GmGID1-2表达量最高。过表达GmGID1-2显著增加大豆的株高而敲除则使株高降低同时增加茎秆直径和强度、分枝数、主茎节数、单株荚数 (三粒荚和四粒荚显著增多) 和种子数从而提高单株种子重量与大豆产量并提升种子含油量 (图1)

敲除GmGID1-2改良大豆株型并提高产量和种子

进一步研究表明GmGID1-2DELLA蛋白互作调控大豆株高并通过影响与分枝、固作用和脂肪酸代谢等相关的通路及基因表达 (图2)进而调控大豆分枝数和种子含油量。

GmGID1-2调控大豆株高、分枝数和油脂含量的分子机制解析

基于敲除GmGID1-2豆果荚和种子数显著增加并引起DELLA蛋白积累以及DELLA在其他豆科植物中可促进根瘤菌侵染与根瘤共生的作用研究推测在GmGID1-2敲除突变体中为大豆提供主要氮源的根瘤固氮作用也相应增强。实验证实突变体中的根瘤数目和干重、固氮酶活性以及植株氮含量均显著提高 (图3A-G)。进一步分析表明敲除GmGID1-2促进了根瘤菌侵染、根瘤共生和固氮相关基因的表达 (图3H-K)

敲除GmGID1-2增强大豆根瘤固氮

进一步分析GmGID1-2的自然变异发现 (4)在课题组264份大豆资源及大豆公共数据库中其编码区均未鉴定到导致基因功能丧失或氨基酸变化的序列变异; 而启动子区局部关联分析发现Gm_36396036位点与大豆株高显著关联。该位点将GmGID1-2启动子分为Pro-CPro-T两种类型其中Pro-C型启动子的大豆株高更矮、产量和种子含油量更高GmGID1-2基因表达量更低,与GmGID1-2敲除株系表型一致。在Pro-C优异单倍型的遗传背景下敲除GmGID1-2可进一步提高大豆的产量、种子含油量和根瘤固氮

大豆GmGID1-2优异等位变异和一因多效功能

本研究系统解析了GmGID1-2的一因多效挖掘到可同时改良大豆株型、产量和根瘤固氮的优异等位变异并创制了更优异的新等位基因。GmGID1-2的优异等位基因不仅能改良大豆株型和产量还可显著增强茎杆强度、根瘤固氮能力和种子含油量为可持续性农业发展提供宝贵的基因资源和理论依据。

南京农业大学博士研究唐嘉君论文第一作者, 李艳教授为通讯作者。南京农业大学盖钧镒院士华大基因赵山岑博士为本研究提供了大豆种质资源重测序信息, 南京农业大学已毕业研究生李姝璇靳婷杨舒涵杨倩倩在读研究生岳秀丽刘腾飞杨鑫宇张凯参与了该研究。该研究获得了国家自然科学基金、江苏省种业振兴揭榜挂帅项目、作物遗传与种质创新利用全国重点实验室、国家大豆生物育种产教融合创新平台、农业农村部大豆生物学与遗传育种重点实验室、江苏省大豆生物技术与智能育种重点实验室生物育种钟山实验室、南京农业大学三亚研究院等资助和支持。

文章引用:
Tang, J., Yang, S., Li, S., Yue, X., Jin, T., Yang, X., Zhang, K.,Yang, Q., Liu, T., Zhao, S., et al. (2025). Editing a gibberellin receptor gene improves yield and nitrogen fixation in soybean.J. Integr. Plant Biol. https://doi.org/10.1111/jipb.70026

植物科学最前沿,专注于植物科学前沿进展、资讯、招聘信息的发布及方法软件共享等投稿及招聘请后台回复“投稿”,均为无偿;商务合作请联系微信ID:zwkxqy ;

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  1. CONNECT:[ UseTime:0.000764s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001001s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000327s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000252s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000431s ]
  6. SELECT * FROM `set` [ RunTime:0.000260s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000501s ]
  8. SELECT * FROM `article` WHERE `id` = 460768 LIMIT 1 [ RunTime:0.001295s ]
  9. UPDATE `article` SET `lasttime` = 1772943118 WHERE `id` = 460768 [ RunTime:0.003444s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000261s ]
  11. SELECT * FROM `article` WHERE `id` < 460768 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000403s ]
  12. SELECT * FROM `article` WHERE `id` > 460768 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000465s ]
  13. SELECT * FROM `article` WHERE `id` < 460768 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003254s ]
  14. SELECT * FROM `article` WHERE `id` < 460768 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009318s ]
  15. SELECT * FROM `article` WHERE `id` < 460768 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004429s ]
0.105507s