Molecular marker heterozygosities and genetic distances as correlates of production traits in F1 bovine crosses.
AUTOR(ES)
TAMBASCO-TALHARI, D.
FONTE
Genetics and Molecular Biology
DATA DE PUBLICAÇÃO
2011
RESUMO
The objective of the present study was to evaluate the influence of the degree of heterozygosity and genetic distance on growth, carcass and reproductive related features in F1 bovine crosses. We tested 10 polymorphic markers in 330 purebred cattle (Nelore, Canchim, Aberdeen Angus and Simental) and 256 crossbred cattle belonging to four crossbred groups. Individual heterozygosities ( Hi) and multilocus genetic similarity ( Dm) were estimated and used in correlation analysis against individual phenotypic measurements. Significant (p < 0.05) Hi effects occurred for birth weight, 15 to 18 month weight, hot carcass weight and longissimus rib eye area. The extent to which increased heterozygosity (. H) in F1 crosses can be predicted from the genetic distance of parental breeds was also investigated using Nei?s standard genetic distance ( Ds) and standard heterozygosity ( Hs). High correlations were found between . Hi, . Hs and the Ds of the parental breeds. Our results suggest that heterozygosity of the ten molecular markers used in this study may affect live weight during at least one growth phase. Parental genetic distance was a suitable predictor of the degree of progeny heterozygosity.
ASSUNTO(S)
bovine crosses molecular markers heterozygosity genetic distance production traits
ACESSO AO ARTIGO
http://www.alice.cnptia.embrapa.br/handle/doc/47184Documentos Relacionados
- Molecular marker heterozygosities and genetic distances as correlates of production traits in F1 bovine crosses
- Microsatellites and RFLP heterozygosities as correlates of growth feature in F1 bovine crosses.
- D-serine deaminase is a stringent selective marker in genetic crosses.
- Some Inter- and Back-Crosses of F1 Oenothera
- The Analysis of Quantitative Traits for Simple Genetic Models from Parental, F1 and Backcross Data