Genetic variability in local Brazilian horse lines using microsatellite markers

Silva, A.C.M.; Paiva, Samuel Rezende; Albuquerque, M. S. M.; Egito, A. A. do; Santos, S. A. dos; Lima, Fagner Carlos de; Castro, Sílvia; Mariante, A. da S.; Correa, Pamela; McManus, Concepta

doi:10.4238/2012.april.10.4

Cited by 23 publications

(14 citation statements)

References 23 publications

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“…The average allelic diversity within the remnant Nordestino populations was similar to that observed in other horse breeds from Brazil and around the world (Sereno et al, 2008;Cothran et al, 2011;Conant et al, 2012;Silva et al 2012), in which similar microsatellite markers were used. High genetic diversity was observed in the remnant population of the Nordestino horse studied here, according to estimates of genetic composition (Table 1).…”

Section: Discussionmentioning

confidence: 53%

“…Nevertheless, the Nordestino horse population was in HWE. Silva et al (2012) found that populations of Campeiro, Lavradeiro, Pantaneiro, Baixadeiro, Mangalarga Marchador, Arab, and thoroughbred horse breeds were not in HWE. Those authors used 11 microsatellites, six of which were used in the present study (HMS3, HMS6, HMS7, HTG6, HTG7, and VHL20).…”

Section: Discussionmentioning

confidence: 99%

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Genetic relationship between the Nordestino horse and national and international horse breeds

Pires

Coelho

Melo³

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Knowledge of genetic diversity and relationships between breeds is very important for conservation programs. Hair samples were collected from 393 individual Nordestino horses and genotyped using 14 microsatellite markers in order to investigate the genetic relationship between this breed and 66 international horse breeds. There was high allelic diversity and inbreeding coefficient within population values were not significant, which was probably due to crossbreeding. Despite the Nordestino horse population being in Hardy-Weinberg equilibrium, a global deficit of heterozygotes was observed. This may represent evidence of repeated use of the same stallions for breeding, which is consistent with the high number of castrated males found. Campolina, Mangalarga Marchador, and Mangalarga were the Brazilian horse breeds most closely related to the Nordestino horse, which is a reflection of recent introgressions. Among Iberian horse breeds, the Sorraia breed appears to have had an important influence on the genetics of the Nordestino horse. Those results provide important information that can guide future conservation programs.

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Section: Discussionmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Genetic relationship between the Nordestino horse and national and international horse breeds

Pires

Coelho

Melo³

et al. 2016

Genet. Mol. Res.

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“…Perhaps, for this reason, this estimation method is efficient for this breed and because, according to Silva et al (2012), there is a significant genetic proximity between the breed originally used to elaborate this method and the MM breed.…”

Section: Discussionmentioning

confidence: 99%

Estimation methods and correction factors for body weight in Mangalarga Marchador horses

et al. 2017

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-The objective was to evaluate the accuracy of six body weight (BW) estimating methods in Mangalarga Marchador horses (MM) (n = 318): method A -tape placements at three different positions around the thoracic girth; B -Crevat and Quetelec's formula; C -Hall's formula; D -Hintz and Griffiths' table; E -Santos' table; and F -Cintra's formula. For additional analyses, gender, age, and gestational stage were considered. Estimated average BW was compared to the actual scale weight by the paired T test, mean predicted error, and determination coefficient. In the general population, methods A (position 3), B, and C estimated BW that were different from that of the scale. Method A, at positions 1 and 2, was more accurate in predicting the scale weight results compared with all other methods. For pregnant mares, the tape in positions 1 and 2 in method A did not differ from those of the scale. Method A in positions 1 and 2 and the table (method E) may be used to estimate the BW of males and females of different ages and/or gestational stages. To use Methods B and C, correction factors are necessary to precisely estimate the body weights in this breed.

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“…Nowadays, analyses are more often conducted on non-coding sequences of nuclear DNA, e.g. microsatellites (Cañon et al, 2000;Silva et al, 2012;Xu et al, 2012) as well as on mitochondrial DNA (Vilà et al, 2001;Mirol et al, 2002;Kavar and Dovč, 2008).…”

Section: Introductionmentioning

confidence: 99%

Genetic distances between horse breeds in Poland estimated according to blood protein polymorphism

Stachurska¹,

Nogaj²,

Brodacki³

et al. 2014

CZECH J ANIM SCI

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ABSTRACT. The objective of the study was to estimate the heterozygosity and phylogenetic relationship between horse breeds in Poland, according to erythrocyte antigens and protein polymorphisms. The study included 15 434 horses: Polish Coldblood, Małopolski, Wielkopolski, Hucul, Polish Konik, Biłgorajski, Felin Pony, and ponies of Shetland origin. A total of 14 loci were studied: seven blood groups and seven protein polymorphism systems. Phylogenetic trees obtained for the erythrocyte antigens and protein variants were mostly alike which suggests that both kinds of markers may be equally used in estimating the similarity of animal populations. The lower polymorphism of the structural and enzymatic proteins, as compared with the erythrocyte antigen, resulted in a lower number of alleles per locus, lower heterozygosity, and closer genetic distances. The level of heterozygosity and phylogenetic trees of the breeds turned out to be mostly concordant with the known history of the populations. Małopolski and Wielkopolski horses are the most homozygous, the Huculs, Polish Koniks, and Biłgorajskis have a middle position, while the Polish Coldbloods and the ponies are the most heterozygous. The Polish Koniks are the most related to other breeds which shows that all the breeds studied, Polish Coldbloods included, have many indigenous ancestors. The Huculs, Polish Koniks, and Biłgorajskis are closely related. In spite of different histories, the Małopolski and Wielkopolski horses have the closest relationship. The Felin Ponies cluster together with the Shetlands. According to the blood groups and protein variation, the genetic diversity of the studied horse breeds is low and mainly due to individual differences. The low genetic variability of the breeds suggests reconsidering the long-term strategies of horse breeding in Poland, particularly of the conserved breeds.

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Genetic variability in local Brazilian horse lines using microsatellite markers

Cited by 23 publications

References 23 publications

Genetic relationship between the Nordestino horse and national and international horse breeds

Genetic relationship between the Nordestino horse and national and international horse breeds

Estimation methods and correction factors for body weight in Mangalarga Marchador horses

Genetic distances between horse breeds in Poland estimated according to blood protein polymorphism

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