Estrutura genética da raça Sindi no Brasil

Faria, F. J. C.; Filho, Aníbal Eugênio Vercesi; Madalena, F. E.; Josahkian, L. A.

doi:10.1590/s1516-35982004000400005

Cited by 7 publications

(4 citation statements)

References 10 publications

(6 reference statements)

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“…If this trend continues, Ne could shrink in the near future, as this parameter considers an ideal population where the same number of males and females are randomly mating. A previous study on Sindhi cattle reported Ne values decreasing from 161 (1979-1983) to 9 (1994-1998Faria et al, 2004). The authors attributed this fall to the difference in the number of males and females in reproduction.…”

Section: Discussionmentioning

confidence: 89%

“…Research of the genetic structure of the Brazilian Red Sindhi breed using pedigree records from 1979 to 1998 reported increase in Fst from 0.07 to 5.65% and Fis from 0.30 to 4.74% (Faria et al, 2004). Faria et al (2002), studying the genetic structure of Polled Nelore in Brazil found values of Fst = 0.0056 and Fis = 0.0045.…”

Section: Discussionmentioning

confidence: 99%

“…The genetic structure of populations through pedigree information can clarify important circumstances affecting the genetic history of populations. Numerous studies to evaluate generation intervals, inbreeding, effective population size and other population parameters have been carried out to provide subsidies for breeding or conservation programs (Faria et al, 2001;Vercesi Filho et al, 2002a;2002b;Faria et al, 2004;Cleveland et al, 2005;Carolino and Gama, 2008;Martinez et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Population structure of the Brazilian Crioula Lageana cattle (Bos taurus) breed

Pezzini

Mariante

Martins³

et al. 2018

Rev Colomb Cienc Pecu

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Background: The lack of information on population structure is one of the main obstacles to develop breeding and conservation programs for animal genetic resources. Objective: To characterize the population structure of Crioula Lageana cattle breed (Bos taurus) in order to assess its genetic diversity. Methods: Database with information of 1,638 Crioula Lageana animals, collected during 38 years, was analysed using the ENDOG v.4.4 program. Results: Effective population size ranged from 72.53 in complete generations to 143.90 in maximum generations. Inbreeding and Average Relatedness coefficients were 0.34 and 0.91%, respectively. The effective number of founders and ancestors were 29 and 28 animals, respectively, and only ten ancestors were responsible for 50% of the genetic variability of the whole population. The average generation interval was 5.84 years in the paternal line and 7.70 in the maternal one. Wright´s F statistics indicated low Palavras-chave: análise de pedigree, conservação de recursos genéticos animais, diversidade genética, endogamia, raças localmente adaptadas.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Population structure of the Brazilian Crioula Lageana cattle (Bos taurus) breed

Pezzini

Mariante

Martins³

et al. 2018

Rev Colomb Cienc Pecu

View full text Add to dashboard Cite

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“…Purebred herds of this breed can also be found in India and many other countries that imported animals from Pakistan. In this way, Brazil also imported Red Sindhi animals, whereas those animals have been demonstrating good adaptation to a variety of environmental conditions (Faria et al 2004;Khatri et al 2004;Pundir et al 2007;Mello et al 2016;Panetto et al 2017a;Carvalho et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Principal component and cluster analyses of production and fertility traits in Red Sindhi dairy cattle breed in Brazil

Mello

Sinedino

Ferreira

et al. 2019

Trop Anim Health Prod

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The objective of this study was to investigate the relationship among functional traits (age at first calving (AFC), calving interval (CI), reproductive efficiency (RE), total milk yield (TMY), and lactation period (LP)) in Red Sindhi breed through multivariate techniques. For this goal, performance data provided by the Brazilian Association of Zebu Breeders related to 560 Red Sindhi dairy cattle from 28 different herds in Brazil, born in the period from 1987 to 2011, were used. Principal component analysis with correlation matrix was used to find the relationship among AFC, CI, RE, TMY, and LP. It was found that for all functional traits, first 3 principal components explained more than 90% of the total variation. Clustering analysis was performed based on Tocher method, and results showed physiological relationships among functional traits. By cluster analysis, twelve different groups were generated from the pool of Sindhi herds analyzed, with a great homogeneity among females for the traits evaluated and only few females generating separate groups. Four hundred and twenty-nine females were clustered in one group, representing 76.60% of the genotypes. Total milk yield (TMY) showed 71.92% of the total variation, and age at first calving (AFC) contributed with 23.06% of the variation, being the two most important traits for the variability of the data set. In conclusion, the multivariate procedures were effective in generating the correlations among the functional traits, showing that CI is correlated with RE and all these functional traits are related with total milk yield.

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Population structure and genetic variability in the Murrah dairy breed of water buffalo in Brazil accessed via pedigree analysis

Malhado

Carneiro

et al. 2012

Trop Anim Health Prod

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The objective of this study was to use pedigree analysis to evaluate the population structure and genetic variability in the Murrah dairy breed of water buffalo (Bubalus bubalis) in Brazil. Pedigree analysis was performed on 5,061 animals born between 1972 and 2002. The effective number of founders (fe) was 60, representing 6.32 % of the potential number of founders. The effective number of ancestors (fa) was 36 and the genetic contribution of the 17 most influent ancestors explained 50 % of the genetic variability in the population. The ratio fe/fa (effective number of founders/effective number of ancestors), which expresses the effect of population bottlenecks, was 1.66. Completeness level for the whole pedigree was 76.8, 49.2, 27.7, and 12.8 % for, respectively, the first, second, third, and fourth known parental generations. The average inbreeding values for the whole analyzed pedigree and for inbreed animals were, respectively, 1.28 and 7.64 %. The average relatedness coefficient between individuals of the population was estimated to be 2.05 %-the highest individual coefficient was 10.31 %. The actual inbreeding and average relatedness coefficient are probably higher than estimated due to low levels of pedigree completeness. Moreover, the inbreeding coefficient increased with the addition of each generation to the pedigree, indicating that incomplete pedigrees tend to underestimate the level of inbreeding. Introduction of new sires with the lowest possible average relatedness coefficient and the use of appropriate mating strategies are recommended to keep inbreeding at acceptable levels and increase the genetic variability in this economically important species, which has relatively low numbers compared to other commercial cattle breeds. The inclusion of additional parameters, such as effective number of founders, effective number of ancestors, and fe/fa ratio, provides better resolution as compared to the inclusion of inbreeding coefficient and may help breeders and farmers adopt better precautionary measures against inbreeding depression and other deleterious genetic effects.

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Estrutura genética da raça Sindi no Brasil

Cited by 7 publications

References 10 publications

Population structure of the Brazilian Crioula Lageana cattle (Bos taurus) breed

Population structure of the Brazilian Crioula Lageana cattle (Bos taurus) breed

Principal component and cluster analyses of production and fertility traits in Red Sindhi dairy cattle breed in Brazil

Population structure and genetic variability in the Murrah dairy breed of water buffalo in Brazil accessed via pedigree analysis

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