Abstract
Unequal inheritance of parental alleles (segregation distortion) is an unpredictable factor in breeding improved arable crop cultivars. Data from 13 genetic mapping populations of Brassica napus, B. rapa and B. oleracea were compared to investigate the variation of segregation distortion in the Brassica A and C genomes, and to search for overlapping regions of segregation distortion between aligned genetic maps. Regions of greater segregation variability were identified close to the self-incompatibility locus on linkage group C06, and on linkage groups A02, A03, C05 and C09. In three populations, segregation favoured male and female parents, respectively, on homoeologous regions of A02 and C02. In regions of linkage groups C05 and C06, segregation favoured male and female parents, respectively, in populations produced by anther and microspore culture. In one reciprocal cross, segregation always favoured the female parent on linkage groups A03, C01, C04 and C09. Segregation varied widely between populations and linkage groups, but least segregation distortion was observed on linkage groups A01 and A08.
| Original language | English |
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| Journal | Theoretical and Applied Genetics (TAG) |
| Publication status | In preparation - 2012 |
Keywords
- linkage map
- Brassica napus
- doubled haploid
- microspore culture
- anther culture
- incompatibility locus
- oilseed rape