Genetic variability in common wheat germplasm based on coefficients of parentage

Genetics and Molecular Biology

Fernanda Bered²  José F. Barbosa-neto¹  Fernando I.f. De Carvalho¹ 

[1] ,UFRGS Instituto de Biociências Departamento de GenéticaPorto Alegre RS ,Brazil

关键词: COP;    genetic base;    gene pool;    Triticum aestivum L;   

DOI  :  10.1590/S1415-47572002000200015

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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