Reference Report for SoyBase9302733
| Title: | Genetic Linkage in Soybean: Classical Genetic Linkage Groups 6 and 8 |
| Authors: | Mahama, A.A., Lewers, K.S., Palmer, R.G. |
| Source: | Crop Sci. 2002, 42(5):1459-1464 |
| Abstract: | Mapping mutants of classical linkage groups 6 and 8 (CLGs 6 and 8) in soybean [Glycine max (L.) Merr.] can enhance the identification of important agronomic traits. Genetic data suggest that CLGs 6 and 8 may belong to the same linkage group. Our objectives were to determine if CLGs 6 and 8 are the same or different linkage groups and to determine the gene order. Genotypes containing mutants of CLGs 6 and 8 and mutants of other CLGs were crossed in various combinations. Data for the different characters were collected from F2 populations and F2:3 families. Recombination values confirmed that CLG 6 characters, Df2 and Y11 were linked (R = 27.0 ± 5.9), Df2 was linked to Ms1 (CLG 8) (R = 24.8 ± 1.2) and to W1 (CLG 8) (R = 36.4 ± 1.3), and Y11 was linked to Ms1 (R = 31.7 ± 1.4). F2 data suggested that Y11 segregated independently of W1, while F2:3 data indicated the two were linked (R = 38.4 ± 3.2). Our data indicated that CLGs 6 and 8 belong to the same linkage group, which is molecular linkage group F (MLG F), and chromosome 13. Y11 and Adh1 are at the ends of the chromosome segment studied, and Y23 is located between Ms6 and St5. Recombination values among the other loci of CLG 8, and between them and loci of other CLGs were consistent with published values. This information will be useful in the reassignment of CLGs, ordering of loci, and will enhance molecular genetic linkage mapping in soybean. |
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