The objective was to assess the genetic diversity and phylogenetic relationship of nine sheep populations. Overall, these sheep populations in the study exhibited a rich genetic diversity. The nine sheep populations can be divided into two groups. SUF and DST were clustered in one group, and GMM–BAS–BAM, HUS–STH and DOS–DOP were divided into three clusters. This clustering result is consistent with sheep breeding history. TreeMix analysis also hinted at the possible gene flow from GMM to SUF.
The expression patterns of the HPG axis-related genes in rams were analyzed using qPCR. It showed that DIO2 and KISS1 were mainly expressed in pituitary and hypothalamus in both breeds, respectively. EYA3 and GPR54 were widely expressed in both breeds, with significant differences in testis and vas deferens. We speculated that the four genes may regulate the estrous mode in different regions in rams. This is the first study to analyze the expression patterns of HPG axis-related genes in rams.
The objective of the current research was to evaluate genetic relationships among indigenous Turkish Karayaka sheep subpopulations as well as genetic diversity. Our results show a high genetic differentiation among subpopulations, which is quite interesting when considered for only one breed. This differentiation should be taken into consideration when preparing conservation programs and future breeding strategies.
Lanping black-boned sheep is a novel and rare sheep breed discovered in the 1950s in China and has the same hyperpigmentation trait as silk fowl. Lanping black-bones sheep has same morphology with Lanping native sheep such as coat color, and horns and tail shape, so it's interesting to investigate the genetic relationship of the two breeds and the genetic origin of Lanping black-boned sheep. Lanping black-boned sheep and Lanping native sheep have great genetic similarity.
This study characterises farmer’s preferences for breeding rams and tackles their willingness to contribute to the wool sheep Koundoum conservation programme through their quantified appreciation of the main phenotypic features of the sheep breed in the region. In Tillabéri region, i.e. the Koundoum sheep’s area of origin, the proportional piling tool is first used in 11 focus group discussions of breeders to determine the main selection criteria of breeding rams. The multi-attribute analysis me
The characterization of local sheep breeds, two Slovenian (Bela Krajina and Istrian Pramenka) and four Montenegrin (Bardoka, Sjenička, Pivska Pramenka, and Zeta Žuja), was done on the basis of morphometric measures and indices. The PCA of morphometric parameters extracted three components explaining 96.6 % of cumulative variance. A cluster analysis grouped Pivska Pramenka with Sjenička and Istrian with Bela Krajina Pramenka in two clusters, while Bardoka and Zeta Žuja were clustered separately.
The objective of the current research was to investigate 12 STR loci based on genetic diversity in sheep herds as well as the differentiation and relationship among the number of alleles and genetic links between Kazakh sheep breeds. Based on our results, all five populations examined show high genetic diversity because of a high effective number of alleles, a large number of alleles, high PIC values, and 12 completely polymorphic tested microsatellites.
This study was conducted to identify the Ovar-DRB1 gene in the major histocompatibility (MHC) complex gene region by DNA sequencing in some native sheep breeds in Turkey. In total, 25 new alleles were revealed in Ovar-DRB1 in Turkish native sheep breeds, with 24 variable sites. The average pairwise genetic distance was 0.029 % for Ovar-DRB1. Two main groups were detected in Turkish sheep breeds. All Dağliç and Kivircik alleles and one allele from Karayaka, Malya and Sakiz are grouped together.
The coat colour of animals is an extremely important trait that affects their behaviour and is decisive for survival in the natural environment. The trait serves to distinguish between breeds and varieties. Coat colour is also an important economic trait. Understanding the genetic background of variation in one of the most important phenotypic traits in livestock would help to identify new genes that have a great effect on the coat colour type.
Compared with worldwide normal sheep with reddish muscle, the Nanping black-boned sheep is the only mammal similar to silky fowl with black muscles. The effects of mutations of the gene for tyrosinase-related protein 1 (TYRP1) on the black muscles and coat color in Nanping black-boned sheep were investigated.
This paper contributes considerably to our knowledge about phylogenetic relations in four Polish sheep breeds as well as the genetic origin of them. We analysed polymorphisms of the mitochondrial control region (D-loop) in the following sheep breeds: Wrzosówka, Świniarka, Pomorska, and Wielkopolska. All but Swiniarka represent the two main mitochondrial haplogroups, i.e. haplogroup B (more frequent) and haplogroup A. The Świniarka breed is exclusively made up of haplogroup B sequences.
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