Abstract:
:Local domestic chicken populations are of paramount importance as a source of protein in developing countries. Bangladesh possesses a large number of native chicken populations which display a broad range of phenotypes well adapted to the extreme wet and hot environments of this region. This and the fact that wild jungle fowls (JFs) are still available in some regions of the country, it urges to study the present genetic diversity and relationships between Bangladeshi autochthonous chicken populations. Here, we report the results of the mitochondrial DNA (mtDNA) sequence polymorphisms analyses to assess the genetic diversity and possible maternal origin of Bangladeshi indigenous chickens. A 648-bp fragment of mtDNA control region (D-loop) was analyzed in 96 samples from four different chicken populations and one red JF population. Sequence analysis revealed 39 variable sites that defined 25 haplotypes. Estimates of haplotype and nucleotide diversities ranged from 0.745 to 0.901 and from 0.011 to 0.016, respectively. The pairwise differences between populations ranged from 0.091 to 1.459 while most of the PhiST (ΦST) values were significant. Furthermore, AMOVA analysis revealed 89.16 % of the total genetic diversity was accounted for within population variation, indicating little genetic differentiation among the studied populations. The median network analysis from haplotypes of Bangladeshi chickens illustrated five distinct mitochondrial haplogroups (A, D, E, F and I). Individuals from all Bangladeshi chicken populations were represented in the major clades D and E; those maternal origins are presumed to be from Indian Subcontinent and Southeast Asian countries, more particularly from South China, Vietnam, Myanmar and Thailand. Further, phylogenetic analysis between indigenous chicken populations and sub-species of red JFs showed G. g. gallus and G. g. spadiceus shared with almost all haplogroups and had major influence than G. g. murghi in the origin of indigenous chicken of Bangladesh. These results suggest that Bangladeshi indigenous chickens still have abundant genetic diversity and have originated from multiple maternal lineages, and further conservation efforts are warranted to maintain the diversity.
journal_name
Mol Biol Repjournal_title
Molecular biology reportsauthors
Bhuiyan MS,Chen S,Faruque S,Bhuiyan AK,Beja-Pereira Adoi
10.1007/s11033-013-2522-6subject
Has Abstractpub_date
2013-06-01 00:00:00pages
4123-8issue
6eissn
0301-4851issn
1573-4978journal_volume
40pub_type
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