ARS | Publication request: Variance of Molecular Genetic Distances among Alfalfa Synthetic Populations by Marker Type

Submitted to: Agronomy Abstracts
Publication Type: Abstract
Publication Acceptance Date: October 30, 2004
Publication Date: November 1, 2004
Citation: Kisha, T.J., Johnson, R.C., Skinner, D.Z., Bauchan, G.R., Greene, S.L. 2004. Variance of molecular genetic distances among alfalfa synthetic populations by marker type. Agronomy Abstracts. #5781.

Technical Abstract: Three alfalfa populations were analyzed using four types of molecular markers. The variance of allele frequencies obtained with bootstrap analysis followed the empirical formula p(1-p)/n. All marker types showed similar relationships among the three populations when calculated using allele frequency data. The cultivarYonca (Spain) was more distant from the other two cultivars (Hunter River, Australia; Aragon, Turkey). Principal coordinate analysis showed no distinct groupings in the first two dimensions, which accounted for only 10% of the variation. Phenograms also showed no distinct clusters separating the three populations, but smaller clusters formed with members of the same cultivar, and clusters with mixtures of Aragon and Hunter River occurred more often than with Yonca and either of the other two. There were few alleles unique to any population, and no distinct correlation of alleles with any particular cultivar, but genetic relationships based on allele frequency data consistently placed Yonca distant from the other two cultivars.