欢迎访问作物学报，今天是
作物学报 ›› 2025, Vol. 51 ›› Issue (7): 1747-1756.doi: 10.3724/SP.J.1006.2025.44221
胡蒙,沙丹,张晟瑞,谷勇哲,张世碧,李静,孙君明*,邱丽娟*,李斌*
HU Meng,SHA Dan,ZHANG Sheng-Rui,GU Yong-Zhe,ZHANG Shi-Bi,LI Jing,SUN Jun-Ming*,QIU Li-Juan*,LI Bin*
摘要：
大豆是重要的粮饲兼用作物。分枝数是影响大豆产量的重要农艺性状之一。本研究以少分枝大豆品种中黄35与多分枝品种中黄13杂交衍生的RIL F2:7-8群体为材料，结合重测序基因型数据构建的高密度遗传连锁图谱，采用QTL IciMapping完备复合区间定位方法，在5个种植环境下定位与分枝数相关的QTL。结果显示，在2号、6号、18号和19号染色体上共定位到6个与分枝数相关的QTL。其中位于2号染色体的qVBN02-1在2个环境中均被检测到，平均解释16.07%的表型变异，为新发掘的分枝数稳定主效QTL。该位点区间遗传距离为0.3 cM，物理距离为261.37 kb，包含29个注释基因。经QTL区间内双亲错义SNP筛选，发掘出22个分枝数潜在候选基因。GO注释分析显示，这些基因编码的蛋白涉及多个影响植物生长发育的重要过程。本研究不仅为大豆株型改良提供了分子标记靶位点，也为精细定位大豆分枝数关键基因奠定了基础。
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