当前位置:首页>农业>JIA|甘肃农业大学宿俊吉教授课题组:陆地棉果枝夹角关键基因GhPDF1的功能鉴定及育种演化分析

JIA|甘肃农业大学宿俊吉教授课题组:陆地棉果枝夹角关键基因GhPDF1的功能鉴定及育种演化分析

  • 2026-06-22 13:48:53
JIA|甘肃农业大学宿俊吉教授课题组:陆地棉果枝夹角关键基因GhPDF1的功能鉴定及育种演化分析

棉花(Gossypium spp.)因可提供天然纤维、植物油和植物蛋白而成为世界重要的经济作物。2021年12月29日农业农村部印发《“十四五”全国种植业发展规划》,指出要重点推广适宜机收、早熟、抗性强的棉花品种。合理株型结构有利于培育适宜机采的棉花新品种。在棉花株型构成性状中,果枝夹角(fruit branch angle,FBA)大小与株型紧凑程度最为密切。相对较小的果枝角度会使植株株型结构更加紧凑,符合机械化采收对植株合理密植的要求。因此,挖掘控制棉花果枝夹角的关键基因是开展株型性状分子改良的基础和关键。

近期,甘肃农业大学生命科学技术学院宿俊吉教授课题组完成题为陆地棉果枝夹角关键基因GhPDF1的功能鉴定及育种演化分析”的研究《中国农业科学》2026年第59卷9期正式发表。

该研究通过同源比对,获取PDF1在陆地棉等25个物种中的序列信息,并进行系统进化分析;采用双酶切法构建GhPDF1的病毒诱导的基因沉默(VIGS)载体,并转化陆地棉,明确GhPDF1在调控果枝夹角中的作用;利用418份陆地棉种质资源的重测序数据,挖掘GhPDF1内部的单核苷酸多态性(SNP)位点,并用Sanger测序验证关键SNP位点;分析GhPDF1内部优异等位变异在我国不同育种时期品种中的演变情况。

结果显示,构建陆地棉PDF1与不同物种同源基因的系统发育树,发现它与锦葵科亲缘关系最近,距离禾本科较远;
通过分析该基因在果枝夹角极端材料的表达量,发现其在大夹角材料中低表达,在小夹角材料中高表达;组织表达分析表明,GhPDF1在雌蕊、花瓣和茎等组织中呈现高丰度表达。
VIGS沉默GhPDF1结果显示,相较空载体对照植株,沉默植株果枝夹角连接处的细胞数量显著减少约170个、果枝夹角显著增大8.2°,表明该基因是调控陆地棉果枝夹角的关键基因;
通过对等位变异GhPDF1GGGhPDF1CC的果枝夹角表型分析,发现GhPDF1GG的果枝夹角极显著小于GhPDF1CC,且随着育种时期的不断推进,该优异等位变异的频率从92%上升到98%。
综上,有在陆地棉中沉默GhPDF1,可以促进果枝连接处细胞数量减少,导致果枝夹角显著增大,其基因内部优异等位变异GhPDF1GG的频率随着育种年份的变化呈现逐步上升演变趋势。
甘肃农业大学生命科学技术学院宿俊吉教授王彩香教授为该文共同通讯作者,张文姣第一作者。

该研究获得新疆维吾尔自治区自然科学基金(2022D01E103)、国家自然科学基金(32260522)的资助。

全文链接:
陆地棉果枝夹角关键基因GhPDF1的功能鉴定及育种演化分析

张文姣, 魏佳智, 周亚荣, 杨浩然, 郭荣欣, 马俊峰, 杨嘉辉, 王彩香, 宿俊吉. 陆地棉果枝夹角关键基因GhPDF1的功能鉴定及育种演化分析[J]. 中国农业科学, 2026, 59(9): 1836-1847.

ZHANG WenJiao, WEI JiaZhi, ZHOU YaRong, YANG HaoRan, GUO RongXin, MA JunFeng, YANG JiaHui, WANG CaiXiang, SU JunJi. Functional Identification and Breeding Evolution Analysis of the Key Gene GhPDF1 for Fruit Branch Angle in Upland Cotton[J]. Scientia Agricultura Sinica, 2026, 59(9): 1836-1847.

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  1. CONNECT:[ UseTime:0.000493s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000798s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000307s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000320s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000504s ]
  6. SELECT * FROM `set` [ RunTime:0.000238s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000623s ]
  8. SELECT * FROM `article` WHERE `id` = 551245 LIMIT 1 [ RunTime:0.000423s ]
  9. UPDATE `article` SET `lasttime` = 1782185649 WHERE `id` = 551245 [ RunTime:0.019181s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000336s ]
  11. SELECT * FROM `article` WHERE `id` < 551245 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000553s ]
  12. SELECT * FROM `article` WHERE `id` > 551245 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000389s ]
  13. SELECT * FROM `article` WHERE `id` < 551245 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001654s ]
  14. SELECT * FROM `article` WHERE `id` < 551245 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004584s ]
  15. SELECT * FROM `article` WHERE `id` < 551245 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.015370s ]
0.114837s