Genetic variation within and among different cultivars and landraces of Brassica campestris L. and B. oleracea L. based on isozymes |
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| Authors: | V Simonsen W K Heneen |
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| Institution: | (1) National Institute of Animal Science, Animal Physiology and Biochemistry, Foulum, P.O. Box 39, DK-8830 Tjele, Denmark;(2) Department of Plant Breeding Research, The Swedish University of Agricultural Sciences, S-26831 Svalöv, Sweden;(3) Present address: Department of Terrestrial Ecology, National Environmental Research Institute, Vejlsøvej 25, P.O. Box 314, DK-8600 Silkeborg, Denmark |
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| Abstract: | Genetic variation based on isozymes was studied in 43 landraces and cultivars of Brassica campestris from China, 4 cultivars of B. campestris from Sweden and 1 from India, and 5 cultivars of B. oleracea from Sweden and 1 from China (B. alboglabra). A total of 17 isozyme loci was studied, 10 of these were polymorphic in B. campestris and 6 were polymorphic in B. oleracea. The level of heterozygosity seemed to be reduced in the Swedish cultivars compared to the Chinese landraces and cultivars of B. campestris. The level of heterozygosity in B. oleracea was even lower than that in the Swedish cultivars of B. campestris. A phylogeny of the cultivars and landraces of B. campestris showed that the B. campestris var  yellow sarson cultivar, originating from India, deviated significantly from the other cultivars of B. campestris. A phylogeny of the cultivars of B. oleracea confirmed the expectations that the cultivar B. alboglabra was not closely related to the cultivated forms of B. oleracea. |
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| Keywords: | Brassica campestris Brassica oleracea Isozymes Genetic variation Heterozygosity Phylogeny |
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