Identification of QTLsAssociated with Total SoyasaponinContent in Soybean (Glycine max (L.) Merr.)
2012
HUANG Shan-shan, HAN Ying-peng, LI Chang-suo, TIAN Jun, LI Wen-bin, WANG Ji-an (1.Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education/Fujian Agricultural and Forestry University,Fuzhou 350002, P.R.China 2.Fujian Provincial Key Laboratory of Marker-Assisted Breeding of Rice/Fujian Agriculture and Forestry University, Fuzhou 350002, P.R.China)
Soyasaponins are valuable compounds in certain drugs, industry, food additives and surfactants. Selecting cultivars with higher-soyasaponin content along with agronomic traits is a main goal for many soybean breeders. The aim of the present study was to identify the quantitative trait loci (QTLs) associated with total soyasaponin content through a F2 population, which was derived from a cross between Ha 91016 (higher soyasaponin content cultivar, 16.8 mg g-1) and N98-9445A (lower soyasaponin content, only 5.7 mg g-1). A genetic linkage map including a total of 162 simple sequence repeat markers was constructed, which covered the total length 2 735.5 cM, and the average distance between markers was 16.96 cM. Two QTLs associated with total soyasaponin content were identified. One, qSAP_1 (located in sat_044-satt102 of linkage group (LG) K), could explain 12.6% of phenotypic variance. The other, qSAP_2, was located between satt368 and sat_413 of LG D1a, which could explain 15.8% of phenotypic variance. It was concluded that the two QTLs would have some potential value for marker-assisted selection for high-soyasaponin content breeding in soybeans.
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