Genetic and physiological studies on seed coat cracking in soybean

大豆种皮在田间条件下出现裂开现象。共检测到2个QTL，分别为CR1(MLG)D1b和CR2 MLG M。在近等基因系中，CR1与种子大小或成熟度无关。因此，QTL周围的标记对于在不改变种子大小或成熟度的情况下减少开裂症状的育种可能是有用的。相反，在MLG-C1中检测到两个网状裂解QTL(ncr1和ncr2)，距离约62 cM。这些结果表明，田间条件下种皮开裂的遗传控制不同于网状开裂。近等基因系基因芯片显示，耐性近等基因系(Gma.26856，妈妈。16827，妈妈。173)和在敏感近等基因系(Gma.48109和Gma。49562)。

The seed coat of soybean cracks under field conditions. Two QTLs, cr1(molecular linkage group(MLG) D1b and cr2 MLG M) were identified. The cr1 was not associated with seed size or maturity in near-isogenic lines(NILs). Therefore, markers around the QTL may be useful for breeding to reduce cracking symptoms without altering seed size or maturity. In contrast, two QTLs for net-like cracking(ncr1 and ncr2) were identified in MLG C1 with a distance of about 62 cM. These results suggest that genetic control of seed coat cracking occurring under field conditions was different from net-like cracking. Microarray of the NILs revealed genes highly expressed in the tolerant NIL(Gma. 26856, Gma. 16827, Gma. 173) and genes highly expressed in the sensitive NIL(Gma. 48109 and Gma. 49562).