Data/hora: 15/06/2024 17:57:36

Provedor de dados: | 74
País: | Brazil
Título: | Mitochondrial control region genetic diversity and maternal ancestry of a Brangus-Ibage cattle populations
Autores: | Henkes,Luiz Ernani; Silva Jr,Wilson Araújo; Moraes,José Carlos Ferrugem; Weimer,Tania Azevedo.
Data: | 2005-03-01
Ano: | 2005
Palavras-chave: | Bovine mtDNA; Maternal lineage; Sequence analysis; Beef cattle; Genetic diversity.
Resumo: | The genetic diversity of 277 nucleotides in the mitochondrial DNA control region (nt 15,964 to 16,240 in reference sequence) was analyzed in crossbreed beef cattle (Brangus-Ibage, 5/8 Bos primigenius taurus x 3/8 Bos primigenius indicus) as well as in some Nellore samples (B. p. indicus). Fifty-seven mutations were found in Brangus-Ibage comprising 18 haplotypes (haplotype diversity, h = 0.851 ± 0.041 and nucleotide diversity, ntd = 0.009 ± 0.006) and 66 in Nellore (h = 1.00 ± 0.27, ntd = 0.014 ± 0.012). These data indicated sequence identities of 99.6 and 92.1% between the B. p. taurus' reference sequence and Brangus-Ibage and Nellore, respectively. The comparison of our data with sequence data for 612 individuals recovered from GenBank showed a total of 205 haplotypes defined by 99 polymorphic sites. Most of the variability (53%) was due to differentiation within breeds. The phylogenetic tree constructed using the neighbor-joining method showed clearly the well-known dichotomy between B. p. taurus and B. p. indicus. The Brangus-Ibage clustered with B. p. taurus lineages; however, the displacement of Nellore from B. p. indicus branch probably indicates a substantial B. p. taurus maternal ancestry in some Nellore samples (obtained from GenBank) and reflects the primarily male-driven introduction of this breed in Brazil.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100011
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572005000100011
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.28 n.1 2005
Fonte: | info:eu-repo/semantics/openAccess