摘要
１９９１年以抗大豆孢囊线虫（ＳＣＮ）４号生理小种的兴县灰布支黑豆、中感或中抗（应县小黑豆）、感和高感４个品种为亲本，采用完全双列杂交配制１２个组合，在抗、中感（中抗）×感和高感５个正交和４个反交组合中，Ｆ１全部感病，Ｆ２抗、中感（中抗）和感与高感分离为１：１５的比率，测交分离为１：３比率。在抗×中感（中抗）的正反交组合中，Ｆ１表现抗病，Ｆ２抗和中感（中抗）分离３：１比率，测交为１：１比率，这些组合的结果经ｘ２测定均符合予期比率。因此，确定上述两个抗源品种的抗性受１对显性基因和２对重叠的隐性基因控制。
soybean crosses was made by using diallel cross with varieties which was different on resistance, medium resistance or medium susceptibility,susceptibility and high susceptibility to soybean cyst nematode(SCN).F1 of the 5 resistant and medium resistant×suseeptible,and highly susceptible crosses and their 4 reciprocal crosses were all susceptible.In F2 the segregation ratio was 1: 15 between medium susceptible (medium resistant)and susceptible (highle susceptible).The segregation ratio of test cross was 1: 3 .In the reciprocal crosses with resistance and medium sensitivity (medium resistance). F1 progeny was resistance.The segregation of resistance to medium sensitivity in F2 was 3: 1 and the segregation ratio in testcross progeny was 1:1 ,These results were not significantly different from expected ratio through x2 test.We suggested that a pair of dominant genes and two pairs of overlapping genes controlled SCN resistance in resistant varieties, such as Xingxian Huibuzhiheidou and Yingxina Xiaoheidou.
出处
《大豆科学》
CAS
CSCD
北大核心
1996年第3期191-196,共6页
Soybean Science
