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- Title
SNP haplotypes for soybean resistance to SCN race 1 and 3.
- Authors
da Silveira, Diorgenes Leonam Modernel; Montecelli, Tatiane Dalla-Nora; da Silva, Glacy Jaqueline; Schuster, Ivan
- Abstract
Marker-assisted selection (MAS) for soybean resistance to soybean cyst nematode (SCN) is a common practice in soybean breeding programs. However, only markers associated with resistance to SCN race 3 have been used efficiently in these programs. This study aimed to identify single-nucleotide polymorphism (SNP) haplotypes associated with soybean resistance to SCN races 1 and 3, using qualitative (breeding) and quantitative (female index) approaches. A set of 169 soybean varieties were genotyped with 6000 SNP markers and phenotyped by SCN race 1 and 3 reaction. An association study was carried out by using a mixed linear model. A haplotype containing one SNP on chromosome 8 and one SNP on chromosome 18 was associated with soybean resistance to SCN race 3, and a haplotype containing the same SNP on chromosome 8 and one SNP on chromosome 11 was associated with soybean resistance to SCN race 1. For race 3, the resistance haplotype component markers were identified using the two phenotypic approaches. For race 1, the resistance haplotype was only identified using the breeding approach. The haplotype associated with race 3 identified the phenotype of resistant and susceptible varieties with accuracy of 97.4%. The same accuracy value was obtained using the haplotype associated with resistance to race 1. MAS with the haplotypes containing the SNPs on chromosomes 8 and 18 identified plants that are resistant to race 3, and sequential inclusion of the SNP on chromosome 11 identified among them those that are also resistant to race 1.
- Subjects
SOYBEAN cyst nematode; SOYBEAN; HAPLOTYPES; RACE
- Publication
Euphytica, 2019, Vol 215, Issue 8, pN.PAG
- ISSN
0014-2336
- Publication type
Article
- DOI
10.1007/s10681-019-2465-7