[Genetic diversity and recombination of soybean cultivar Suinong 14 and its pedigree].
In this study, 14 agronomic traits and 139 SSR loci, distributed on 20 linkage groups of soybean (Glycine max L.) cultivar Suinong 14 and its pedigree were analyzed to explain the genetic diversity and recombination of Suinong 14 and to provide useful information for breeding. The cluster analysis based on SSR makers agreed with the pedigree information. The Shannon-Weaver index of each SSR locus ranged from 0 to 1.677. The average genetic similarity coefficient among cultivars was 0.6380, ranged from 0.538 to 0.799. At least three SSR loci were needed to discriminate Suinong 14 from its pedigree, for example a combination of Satt543, Sat_130 and Satt218. These loci have more alleles. No significant difference was observed between the end portion and the mid-portion within a linkage group, which indicates that the distribution of recombination occurred randomly in each linkage group. No polymorphism was detected within 39 of 139 SSR loci between Suinong 14 and its 8 parents. It implys their importance during cultivar improvement. Satt168, a marker on LGB2, was the only locus transmitted from Zihua 4 to Suinong 14, which indicates that the genetic constitute of Suinong 14 is greatly changed compared with Zihua 4 through five generations of recombination.
Qin
Jun
J
National Key Facility for Crop Gene Resources and Genetic Improvement, Key Loboratory of Crop Germplasm & Biotechnology, MOA, Institute of Crop Science, CAAS, Beijing 100081, China. hbnkydd@163.com
Jiang
Cheng-Xi
CX
Liu
Zhang-Xiong
ZX
Fu
Ya-Shu
YS
Guan
Rong-Xia
RX
Chen
Wei-Yuan
WY
Li
Ying-Hui
YH
Zhang
Meng-Chen
MC
Jing
Yu-Liang
YL
Chang
Ru-Zhen
RZ
Qiu
Li-Juan
LJ
D000483:Alleles; D008040:Genetic Linkage; D014644:Genetic Variation; D040941:Heredity; D011110:Polymorphism, Genetic; D011995:Recombination, Genetic; D013025:Glycine max / Q000145:classification / Q000235:genetics* / Q000254:growth & development