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利用来自中豆29×中豆32的165个重组自交系F10进行2年田间试验,以复合区间作图法检测与大豆倒伏及形态性状有关的QTL。结果表明,2年分别检测到25个和19个与大豆倒伏及茎杆性状和根系性状有关的QTL,分布于A2、C1、C2、D1a、F、G、I和L连锁群,可解释4.4%~50.1%的表型变异。在F连锁群上,2年均检测到倒伏主效QTL(qLD-15-1)和株高主效QTL(qPH-15-2);G连锁群有1个主茎节数QTL、A2和L连锁群上分别有1个根重QTL在2个年度重复出现。在倒伏QTL的附近检测出株高、根重、茎叶重、茎粗、主茎节数和分枝数QTL,表明植株地上部和地下部性状与抗倒性普遍关联;QTL定位结果与表型相关分析一致,反映了这些形态性状表型相关的遗传特性。部分性状QTL存在共位性,但是未在2个年度稳定表达。
Two-year field experiments were conducted with 165 recombinant inbred lines F10 from Zhongxu 29 × Zhongdou 32 and QTLs related to soybean lodging and morphological traits were determined by composite interval mapping. The results showed that there were 25 and 19 QTLs related to lodging and stem traits and root traits of soybean in 2 years, respectively, distributed in the linkage groups A2, C1, C2, D1a, F, G, I and L and explained 4.4 % ~ 50.1% of the phenotypic variation. QTL (qLD-15-1) and QPH-15-2 (main QTL for plant height) were detected in F linkage group in two years. There were one major QTL, There were 1 root QTLs on L linkage group recurring in 2 years. QTLs for plant height, root weight, stem weight, stem diameter, main stem number and branch number were detected in the vicinity of lodging QTLs, indicating that the above-ground and underground characters were generally associated with lodging resistance. QTL mapping results and table Type-related analysis was consistent, reflecting the phenotypic-related genetic traits of these morphological traits. QTLs for some traits were found to be co-located but not stably expressed in 2 years.