Efeito da composição genética nas carcaterísticas de conformação em equinos

Costa, Maria Dulcinéia da; Mendes, L. J.; Maruch, Suzana; Meneses, A. C. A.; Neto, T. Martins; Ruas, José Reinaldo Mendes; Chamone, Julieta Maria Alencar

doi:10.1590/1678-4162-8884

Cited by 7 publications

(3 citation statements)

References 10 publications

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“…Thus, the smaller the cannon circumference of a horse, the greater the physical risks for this individual and its descendants since this trait has high heritability (0.68) (Meira et al, 2013). The thoracic circumference is related to cardiorespiratory and digestive capacities of the animal (Costa et al, 2016), besides also being associated with gestational conditions in females (Lucena et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Participation Frequency and Biometric Characterization of Mangalarga Horses that Attended National Shows of the Breed

2022

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Objetivou-se determinar a frequência de participação de equinos Mangalarga em julgamentos morfofuncionais, relacionando às variáveis sexo e faixa etária, e comparar características biométricas desses animais entre si e com o rebanho da raça. Foram utilizadas informações de 4.133 equinos Mangalarga, participantes de exposições nacionais da raça entre 1984 e 2018. Para comparar a proporção de garanhões, fêmeas e machos castrados que participaram de exposições nacionais, os resultados foram submetidos a testes de distribuição de frequência. Para comparar morfologicamente os equinos Mangalarga participantes de exposições nacionais entre si e com o rebanho da raça (206.428 animais), os resultados de medidas lineares foram submetidos ao teste de Mann-Whitney e as médias comparadas pelo teste T não pareado. Observou-se que a maioria dos equinos Mangalarga participantes de exposições nacionais competiram somente uma vez. Em relação a faixa etária dos competidores, a proporção de fêmeas que competiram somente quando potras foi semelhante à das fêmeas que participaram apenas na fase adulta. Já os garanhões competiram mais quando potros. Os equinos participantes de exposições apresentaram maiores valores para as três medidas morfométricas que o rebanho da raça. Além disso, nas últimas três décadas observou-se redução na altura à cernelha e perímetro da canela dos garanhões e fêmeas participantes de exposições. Concluiu-se que a maioria dos equinos Mangalarga participam de apenas uma exposição nacional ao longo de sua vida e que esses animais possuem maior altura à cernelha, perímetro da canela e perímetro torácico que o rebanho da raça.

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Section: Discussionmentioning

confidence: 99%

Participation Frequency and Biometric Characterization of Mangalarga Horses that Attended National Shows of the Breed

2022

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“…Fifteen morphometric traits are measured in Campolina horses at registration. A large amount of data enables to estimate genetic parameters that can better guide the selection of animals by breeders, promoting effective genetic progress of the breed (Lucena et al 2015;Costa et al 2016; Souza et al…”

Section: Introductionmentioning

confidence: 99%

Genomic association using principal components of morphometric traits in horses: identification of genes related to bone growth

Bastos

Diaz

Alves

et al. 2023

Animal Biotechnology

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The measurement of morphometric traits in horses is important for determining breed quali cation and is one of the main selection criteria in the species. The development of an index (HPC) that consists of principal components weighted by additive genetic values allows to explore the most relevant relationships using a reduced number of variables that explain the greatest amount of variation in the data. Genome-wide association studies (GWAS) using HPC are a relatively new approach that permits to identify regions related to a set of traits. The aim of this study was to perform GWAS using HPC for 15 linear measurements as the explanatory variable in order to identify associated genomic regions and to elucidate the biological mechanisms linked to this index in Campolina horses. For GWAS, weighted single-step GBLUP was applied to HPC. The eight genomic windows that explained the highest proportion of additive genetic variance were identi ed. The sum of the additive variance explained by the eight windows was 95.89%. Genes involved in bone and cartilage development were identi ed (SPRY2, COL9A2, MIR30C, HEYL, BMP8B, LTBP1, FAM98A, and CRIM1). They represent potential positional candidates for the HPC of the linear measurements evaluated. The HPC is an e cient alternative to reduce the 15 usually measured traits in Campolina horses. Moreover, candidate genes inserted in region that explained high additive variance of the HPC were identi ed and might be ne-mapped for searching putative mutation/markers.

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“…The main reactive horse breeds were the quarter horse and mangalarga marchador. These breeds are predominant in the state of Maranhão and are known for their great versatility in competitions and field working (COSTA et al, 2016;LAGE et al, 2009). According to the data, glanders has been endemic in the state of Maranhão for the last ten years.…”

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confidence: 99%

Historical highlights regarding glanders, from 2007 to 2017, in the state of Maranhão, Brazil

Vieira

Baquero

Mesquita³

et al. 2023

Cienc. Rural

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Glanders is an infectious disease of equids caused by Burkholderia mallei, a facultative intracellular non-mobile Gram-negative bacterium that can be transmitted to other animals and humans. This study described glanders cases reported in the state of Maranhão, located within an Amazon-Cerrado transition region in northeastern Brazil, from 2007 to 2017. A database in an electronic spreadsheet (Microsoft Excel 2010) was developed containing information on the number of positive animals according to age, sex, purpose, year and month, municipality and mesoregion of origin of the animal. The descriptive analyzis was performed on data provided by the State Agency for Agricultural and Livestock Protection of the state of Maranhão (AGED), and by the official private laboratory. As the database did not have information data about negative animals, possible risk factors could not be evaluated. Among the total of 62,555 equids were evaluated by means of the complement fixation test (CFT), 59,036 were horses, 2,981 mules and 538 donkeys. Thirty-five samples (0.06%) reacted in the CFT. Five additional samples were by the western blot technique and three of them were positive. All the reactive horses (Equuscaballus) were from rural areas. Results presented here indicate that glanders may be endemic in the state of Maranhão and is a public health concern.

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Efeito da composição genética nas carcaterísticas de conformação em equinos

Cited by 7 publications

References 10 publications

Participation Frequency and Biometric Characterization of Mangalarga Horses that Attended National Shows of the Breed

Participation Frequency and Biometric Characterization of Mangalarga Horses that Attended National Shows of the Breed

Genomic association using principal components of morphometric traits in horses: identification of genes related to bone growth

Historical highlights regarding glanders, from 2007 to 2017, in the state of Maranhão, Brazil

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