Tendência genética de medidas lineares de pôneis da raça Brasileira

Costa, Mariana de Moraes Fernandes; Bergmann, Jose Aurélio García; Pereira, C. S; Pereira, Jonas Carlos Campos; Rezende, Adalgiza Souza Carneiro de

doi:10.1590/s0102-09352001000200020

Cited by 6 publications

(11 citation statements)

References 2 publications

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“…The fact that some traits were not significantly affected by sex may be due to greater care taken in presentation and registration of stallions. 7 Most traits were not affected by age. This may be due to the fact that the ABCCP has minimum requirements for height traits involved in many of the indices (135 cm for females and 140 cm for males), therefore requiring animals to be older at registration.…”

Section: Resultsmentioning

confidence: 93%

“…This is in agreement with the literature for other Brazilian breeds. 7,23 In general, sex was significant (P<0.01) for all indices, except Baron and Crevat and tare carrying indices. In other studies, sex tended not to be a significant source of variation for some linear measures 24 , but not al.…”

Section: Resultsmentioning

confidence: 94%

“…This is also in agreement with literature on other Brazilian breeds. 7,23 The subregions Barão de Melgaço, Araputanga, Jaciara, Rondonópolis and Jangada, had horses which tended to be brevilines (apt for traction), but in other regions they were mediolines. The Brazilian Pantanal is very heterogenic with ten distinct subregions being identified 31 , each with its own charcateristics, ecologically different: Cácares, Poconé, Barão de Melgaço, Paiaguás, Nhecolândia, Paraguai, Aquidauana, Miranda, Abobral and Nabileque 32 .…”

Section: Resultsmentioning

confidence: 99%

“…These included withers height (WH), back height (BH), croup height (CH), midback height (MBH), head length (HL), neck length (NL), back-loins length (BLL), croup length (CL), shoulder bone length (SBL), body length (BL), head width (HW), chest width (CW), hip width (HiW), thorax perimeter (TP) and shin bone perimeter (SBP). The measurements were taken in accordance with descriptions in Costa et al 7 and Ribeiro 9 . Analysis of these individual traits can be found in Miserani et al 6 .…”

Section: Methodsmentioning

confidence: 99%

“…6 Conformation of the horse has been studied by various authors, based principally on body measures. 6,7,8 Body indices are used to determine aptitude for certain services such as velocity, resistance and traction. This study aims to determine some body indices for Pantaneiro Horses registered by the ABCCP and the influence of genetic and phenotypic factors on them.…”

Section: Introductionmentioning

confidence: 99%

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Índices corporais para o cavalo pantaneiro

McManus

Santos²,

Silva³

et al. 2008

Braz. J. Vet. Res. Anim. Sci.

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Body index measurements on 2248 horses registered by the Brazilian Association of Pantaneiro Horse Breeders (ABCCP), in the period from 1972 to 2000 were analyzed. Data was analyzed using SAS and DFREML to calculate genetic parameters. The Dactyl Thoracic Index indicated that these animals are intermediary (not light horses but not suitable for traction), while the BARON and CREVAT index confirmed this result. The Chest Index presented animals that are good for speed as they have long legs but looking at the Body index the indication was that these horses are neither suitable for speed nor traction (intermediary). The analysis of other conformation indices indicated that, in general, these horses are medilines, show good speed and chest development, making them suitable for dealing with cattle and resistance for long treks. The environmental factor analysis verified that these horses have changed in recent years possibly due to selection by the breeder which may affect their adaptive capacity.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Índices corporais para o cavalo pantaneiro

McManus

Santos²,

Silva³

et al. 2008

Braz. J. Vet. Res. Anim. Sci.

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Avaliação morfométrica de eqüinos da raça Mangalarga Marchador: índices de conformação e proporções corporais

et al. 2004

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RESUMO -Objetivou-se, com este trabalho, avaliar as relações entre medidas lineares de eqüinos em crescimento, do nascimento aos doze meses, e de animais adultos da raça Mangalarga Marchador. As medidas utilizadas foram peso corporal e medidas de altura, de comprimento, de largura e de perímetro dos animais. Morphometric Evaluation of Mangalarga Marchador Horse: Conformation Index and Body ProportionsABSTRACT -This work aims to evaluate the relationships between body measures of foals from birth to twelve months of age and mature animals of Mangalarga Marchador breed. Measures were body weight and measures of height, length, width, girth of animals. Corporal Index (CI), Meloscopic Index (MI), Dactilo-thoracic Index (DTI) and Weigth in Cannon Index (WCI) were used to evaluate the relationship between measures. The Eclectic System of Linear Proportions was used to evaluation the proportions between linear measures and head length. Colts and fillies were classified as small shape at birth, because the CI were 81.36 and 82.33, respectively. Colts and fillies with four months of age, already presented CI higher than 85.0, and were classified as medium shape. Stallions and mares were classified as medium shape, with CI of 87.17 and 85.18, respectively. Considering the MI, colts and fillies were classified as large shape at birth, changing to medium shape with increase of age and stallions and mares were classified as medium shape. The DTI classified the colts and fillies as hipermetric animals because presented values above 10.8. The WCI ranged from 26.18 to 6.60 for fillies and from 25.93 to 7.04 for colts, while for stallions and mares were 4.16 and 4.96, respectively. Linear measures with greater rates of growth than the head length presented increase of the proportions from birth to adult age, while the measures of smaller rates of growth than the head length presented reverse behavior.

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Genetic parameters and genetic and phenotypic trends of performance traits of equines from the Brazilian Army

et al. 2012

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The objective of this research was to compare the magnitude of genetic parameters (coefficients of heritability and genetic correlation) as estimated by the Restricted Maximum Likelihood (REML) method and Bayesian Inference, and to estimate the genetic and phenotypic trends to the traits height at the withers (HW24) and weight at 24 months of age (W24). The average heritability estimated by Bayesian Inference to HW24 was 0.47, and it was lower than that obtained by REML bi-trait analysis (0.52); however, the value estimated to W24 (0.39) was higher than that obtained by REML bi-trait analysis (0.38). The genetic correlation estimate between W24 and HW24 traits obtained by the REML method (0.66) was lower than that obtained by the Bayesian Inference Method (0.72). From the regression of the average additive genetic merit in the year of birth of the animals, it was found that the averaged genetic values of the animals for HW24 showed a genetic trend near zero (-0.0008cm/year), and the averaged genetic values for W24 showed a negative trend of -0.38 kg/year. The values to the direct heritability estimated for HW24 and W24 suggest that the direct selection for these traits can provide genetic gain in this population. The genetic correlation between the traits, high and positive, suggests that the selection for HW24 should promote increase in W24 at this age. The genetic trends obtained for the traits studied, near zero, indicate that the selection performed produced a slight reduction of the weight of the animals at 24 months of age; however, it did not promote increase in height at the wither at this same age, in this population

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Tendência genética de medidas lineares de pôneis da raça Brasileira

Cited by 6 publications

References 2 publications

Índices corporais para o cavalo pantaneiro

Índices corporais para o cavalo pantaneiro

Avaliação morfométrica de eqüinos da raça Mangalarga Marchador: índices de conformação e proporções corporais

Genetic parameters and genetic and phenotypic trends of performance traits of equines from the Brazilian Army

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