Association between genetic distances in wheat (Triticum aestivum L.) as estimated by AFLP and morphological markers
Genet. mol. biol
;
30(2): 392-399, Mar. 2007. tab
Artigo
em Inglês
| LILACS
| ID: lil-452817
ABSTRACT
Molecular and morphological data analyses matrices are very informative tools for the estimation of genetic distances. We used AFLP markers, morphological traits and combined analysis to estimate the genetic distances between wheat genotypes and ascertain any associations between the two techneques. Nineteen wheat (Triticum aestivum L.) genotypes were analyzed using amplified fragment length polymorphism (AFLP) markers and field evaluated for two years. The matrices obtained by morphological and molecular marker data analyses revealed a significant but moderate correlation (r = 0.47), indicating that such techniques sample distinct genome regions. The combined analysis was found to be highly correlated with AFLP (r = 0.97) and moderately correlated with morphological (r = 0.59) markers. A possible explanation for such results is a bias caused by the much higher number of AFLP (229) than morphological (17) markers. Thus, it is evident that the combined analysis is not efficient when a very dissimilar number of markers are used in each isolated technique. Therefore, to obtain a better knowledge of the degree of divergence among genotypes it is necessary to consider each analysis separately.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Tipo de estudo:
Fatores de risco
Idioma:
Inglês
Revista:
Genet. mol. biol
Assunto da revista:
Genética
Ano de publicação:
2007
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Embrapa Cerrados/BR
/
Universidade Federal de Pelotas/BR
/
Universidade Tecnológica Federal do Paraná/BR
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