Mitochondrial control region genetic diversity and maternal ancestry of a Brangus-Ibage cattle populations
| Autor: | Silva, Luiz E. Henkes, Wilson Araújo, José Carlos Ferrugem Moraes, Tania de Azevedo Weimer |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Bovino
Diversidade genética mtDNA control region Genetics bovine mtDNA Mitochondrial DNA Genetic diversity Phylogenetic tree sequence analysis lcsh:QH426-470 Haplotype maternal lineage genetic diversity Biology Crossbreed humanities Nucleotide diversity lcsh:Genetics beef cattle GenBank Molecular Biology |
| Zdroj: | Genetics and Molecular Biology, Vol 28, Iss 1, Pp 60-66 (2005) Genetics and Molecular Biology, Volume: 28, Issue: 1, Pages: 60-66, Published: MAR 2005 Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS Genetics and Molecular Biology v.28 n.1 2005 Genetics and Molecular Biology Sociedade Brasileira de Genética (SBG) instacron:SBG |
| ISSN: | 1678-4685 1415-4757 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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