Characterization of gene and genotype pools of natural populations and cultivars of red (Trifolium pratense L.) and white clovers (Trifolium repens L.)
Zofia Bulińska-Radomska
z.bulinska@ihar.edu.plInstytut Hodowli i Aklimatyzacji Roślin, Radzików (Poland)
Jerzy Macewicz
Instytut Hodowli i Aklimatyzacji Roślin, Radzików (Poland)
Abstract
Ten cultivars and 30 natural populations of T. pratense and T. repens were surveyed in order to characterize the genetic changes which had appeared in these two species as a result of the breeding manipulations. Fifteen enzyme systems were applied. A total number of identified common alleles and genotypes in cultivars and natural populations, and the total number of alleles and genotypes different for T. pratense and T. repens cultivars and natural populations were calculated. The number of alleles and genotypes was each smaller in cultivars than in natural populations of both species. Relatively small reduction in the number of alleles led to greater differences in genotypic changes in cultivars. The breeding manipulations resulted in reorganization of variability at a genotypic level. Some alleles and genotypes had been eliminated, but new ones not occurring in natural populations, were found in cultivars. New foreign alleles, which were incorporated into cultivar gene pools led to changes in genotypic composition of cultivars. New genotypes identified among cultivars could be created by segregation of alleles which were already present in natural populations but were eliminated in the process of natural selections.
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Authors
Zofia Bulińska-Radomskaz.bulinska@ihar.edu.pl
Instytut Hodowli i Aklimatyzacji Roślin, Radzików Poland
Authors
Jerzy MacewiczInstytut Hodowli i Aklimatyzacji Roślin, Radzików Poland
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