[Inheritance of resistance to Heterodera glycines race 14 in Huibuzhi black bean].
Heterodera glycines is the most serious disease in the world soybean (Glycine max) production. Huibuzhi black bean from Xing County in Shanxi Province, China is one of the most important resistant resources. Using a set of host differentials for soybean cyst nematode and criterion of race classification as well as method of manual inoculation, race 14 was identified as a prevalent one in the soil population of the Experiment Station, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing. A sensitive variety #7 Jidou as a female donor crossed with Huibuzhi black bean. Their offsprings were investigated for resistance to race 14. Two of F1 seedlings demonstrated their resistant. Two populations in F2 including 116 seedlings and 78 seedlings in each one appeared their own separate ratio that was in common: 43R:21S. A genetic hypothesis was proposed that resistance to SCN race 14 in Huibuzhi black bean was controlled by three gene pairs arose. Gene reciprocity existed among them: one recessive epistasis gene pair and two dominant complementary gene pairs. Random 30 families in F3 including 10-15 tested seedlings in each family were screened for resistance to SCN race 14. The segregate ratio, 19R:38Seg.:7S, among F3 families confirmed that the presented genetic hypothesis was correct.
Wang
Y T
YT
Institute of Genetics, Chinese Academy of Sciences, Beijing, China.
Peng
D L
DL
Chen
S Y
SY
D000818:Animals; D005260:Female; D009348:Nematoda / Q000302:isolation & purification*; D010935:Plant Diseases / Q000235:genetics* / Q000469:parasitology; D013025:Glycine max / Q000235:genetics* / Q000469:parasitology*