Genetic variability in common wheat germplasm based on coefficients of parentage
Genet. mol. biol
;
25(2): 211-215, Jun. 2002. tab
Artigo
em Inglês
| LILACS
| ID: lil-335791
RESUMO
The characterization of genetic variability and an estimate of the genetic relationship among varieties are essential to any breeding program, because artificial crosses among less similar parents allow a larger segregation and the combination of different favorable alleles. Genetic variability can be evaluated in different ways, including the Coefficient of Parentage (COP), which estimates the probability of two alleles in two different individuals being identical by descent. In this study, we evaluated the degree of genetic relationship among 53 wheat genotypes, and identified the ancestor genotypes which contributed the most to the current wheat germplasm, as a prediction of the width of the genetic base of this cereal. The results revealed a mean COP of 0.07 and the formation of 22 similarity groups. The ancestor genotypes Ciano 67 and Mentana were those which contributed the most to the current wheat germplasm. According to the COP analyses, the genetic base of wheat rests on a small number of ancestral genotypes
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Variação Genética
/
Pool Gênico
/
Genética Populacional
Idioma:
Inglês
Revista:
Genet. mol. biol
Assunto da revista:
Genética
Ano de publicação:
2002
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Faculdade de Agronomia "Eliseu Maciel"/BR
/
UFRGS/BR
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