Cluster analysis of Czechoslovak and Czech winter wheat cultivars based on coefficients of parentage
1998
Martynov, S. | Dobrotvorskaya, T. (Russian Academy of Agricultural Sciences, Tver (Russian Federation). Information and Computation Centre) | Stehno, Z. | Dotlacil, L.
Coefficients of parentage values of 200 Czech and Slovak winter wheat cultivars released from 1919 to 1997 were used to estimate the latent diversity within winter wheat gene pool. Cluster analysis, based on the coefficient of parentage matrix, resulted in 18 major clusters of related cultivars. Changes in genetic diversity through the time were estimated by averaging coefficient of parentage for all possible combinations of cultivars released within a 10 year period. Since 1950s the genetic similarity of Czech and Slovak winter wheat cultivars varied around the level of quarter sibs similarity. The most commonly used parents of cultivars released in different time periods were determined on the basis of direct contribution to the parentage of current winter wheat cultivars.
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