Analysis of the genusZea (Poaceae) using polymorphic chloroplast simple sequence repeats
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Abstract
We have used polymorphic chloroplast simple sequence repeats (cpSSRs) to analyse levels of diversity and relationships within the genusZea. Between two and nine alleles were found at 15 polymorphic loci and combining the data from these loci gave 32 haplotypes in the 37 accessions studied. Genetic differentiation between the two sections within the genus was calculated using theρST statistic which showed that ∼70% of the total variation was found to exist between the sections. A phylogenetic analysis based on theδμ2 distance metric showed a large split between the two sections and suggested multiple origins of modern cultivated maizeZea mays subsp.mays. The agreement of the phylogenetic tree with other molecular, morphological and karyological studies suggests that cpSSRs may have value in phylogenetic studies in plants.
Key words
Poaceae Zea chloroplast simple sequence repeats diversityPreview
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