ISSN:
1573-4927
Keywords:
WILD BOAR
;
EVOLUTION
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract The mitochondrial DNAs (mtDNAs) from 30 pigbreeds (29 Chinese native breeds and 1 European breed)and wild boars were investigated for restrictionfragment length polymorphisms (RFLPs) to determine thephylogenetic relationships and geneticdiversity among pig breeds and wild boars. Of the 24enzymes used, 8 (AvaI, BclI, BglII, EcoRI, EcoRV, ScaI,StuI, and XbaI) detected polymorphisms. By combining thecleavage patterns for each enzyme, 108individuals were sorted into eight mtDNA mitotypes.There are two haplotype lineages in domestic pigs, i.e.,Chinese and European lineages. The pairwise nucleotidesequence divergence was calculated to be 0.56%between Chinese pigs and European pigs, suggesting thatthey might have diverged from a common ancestorapproximately 280,000 years ago. The wild boars showedmore extensive genetic variation, fourmitotypes were detected in six wild boars. In addition,one of the Zhejiang wild boars was found to share thesame mitotype with Chinese native pigs. A UPGMA treebased on genetic distance among mitotypesindicated that mtDNAs of Chinese pigs and European pigsare clearly divided into two clusters, and Chinese wildboars are more closely related to the Chinese pigs.Our results provide molecular evidence tosupport the previous hypothesis that pigs may be derivedfrom two maternal origins, Asian and European wildboars. Chinese native pig breeds may have a singleorigin.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018763311574
