Estudo da divergência genética entre raças suínas utilizando técnicas de análise multivariada

Fonseca, Ricardo da; Pires, Aldrin Vieira; Lopes, Paulo Sávio; Torres, R.A.; Euclydes, Ricardo Frederico

doi:10.1590/s0102-09352000000400020

Cited by 6 publications

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“…According to Cruz et al (2004), at least 80% of total variance should be explained by the first and second canonical variables. The results similar to those of the present study, in which the first two canonical variables explained more than 80% of the total variance, were obtained by Sakaguti et al (1996) with data from diallelic crossings in rabbits, Fonseca et al (2000) regarding litter traits of pure pig breeds, and Viana et al (2000) in broiler lines.…”

Section: Discussionsupporting

confidence: 93%

Use of multivariate analysis to evaluate genetic groups of pigs for dry-cured ham production

et al. 2012

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a b s t r a c tRecords of a pig population used for dry-cured ham production were used to evaluate genetic groups by multivariate analysis. The investigated genetic groups were as follows: DULL¼Duroc Â (Landrace Â Large White), DULA¼ Duroc Â Landrace, DUWI¼ Duroc Â Large White, WIWI¼ Large White and DUDU¼ Duroc. Two groups were obtained for the carcass traits hot carcass weight (HCW), backfat thickness (BT) and loin depth (LD), with the groups including 597 and 341 animals harvested at 130 kg and at 160 kg weights, respectively. Two groups were also found for ham traits gross ham weight (GHW), trimmed ham weight (THW), ham inner layer fat thickness (HIFT), ham outer layer fat thickness (HOFT), pH (PH), and Göfo value, with 393 and 91 animals harvested at 130 kg and 160 kg weights, respectively. The analysis was performed within each group of traits and harvest weights, and the animals without records were excluded. The first and the second canonical variables explained 97.5% and 93.6% of the total variation for the carcass traits at 130 kg and 160 kg, respectively, and 88.8% of ham traits at 130 kg. In the dispersion graph concerning the canonical means, a significant distance was observed between the genetic groups DUDU and WIWI for the carcass traits at 130 kg and 160 kg and the ham traits at 130 kg. The 50% Duroc animals exhibited little dispersion regarding the carcass traits at 130 kg and 160 kg and were not divergent from the DUDU genetic group for the ham traits at 130 kg. In a cluster analysis using the single linkage method, DULL, DULA and DUWI were grouped with a high similarity level for the carcass traits at 130 kg and 160 kg and ham traits at 130 kg. Using the Tocher optimization method, 50% Duroc crossbred and 100% Duroc purebred animals were grouped for the ham traits at 130 kg, suggesting that for ham traits, 50% Duroc animals were similar to 100% Duroc purebred animals. In this context, the genetic groups Duroc Â Large White, Duroc Â Landrace and Duroc Â (Landrace Â Large White) are recommended for use in producing dry-cured ham.

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Section: Discussionsupporting

confidence: 93%

Use of multivariate analysis to evaluate genetic groups of pigs for dry-cured ham production

et al. 2012

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“…Variáveis canônicas, autovalores, percentagem de variância e da variância acumulada obtidas com a análise de 6 características morfométricas das asas de Apis mellifera. Pois, este estudo pode ser feito através da técnica de variáveis canônicas (Fonseca et al, 2000). Nunes et al (2012), estudando a variação morfométrica das abelhas africanizadas (Apis mellifera) no Brasil, usando em suas análises as asas encontrou nas seis primeiras variáveis canônicas uma variação total de 76% da população em estudo.…”

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2019

Pubvet

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This study aimed to determine possible differences between populations of Africanized bees in the coastal area and of the sertão of Piauí, as a technique using geometric morphometry. The material analyzed consisted of adult workers of Africanized bees from the coastal region and of the sertão of Piauí. It was used as a comparative reference breeds digital images of the wings of 50 individual's subspecies of European, African, and 45 individuals of Africanized bees coming from Ribeirao Preto in morphometric analyzes. In total we analyzed 645 images of wings. In the morphometric

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“…O efeito do tamanho da leitegada na duração do parto e na ocorrência de natimortos e mumificados foi descrito por outros autores (Plonait, 1988;Britt et al, 1999) Borges et al (2005), de que fêmeas de ordem de parto 2 a 5 são mais prolíferas que aquelas de primeiro parto. A média de leitões nascidos deve ser considerada satisfatória, especialmente por se tratarem de fêmeas de primeiro e segundo partos (Coma et al, 1996;Fonseca et al, 2000;Yang et al, 2000).…”

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Indicadores de desempenho relacionado ao parto de fêmeas suínas de primeiro e segundo partos

et al. 2010

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RESUMO -Foi realizado um estudo para identificar parâmetros de desempenho associados a indicadores de eficiência durante o parto de fêmeas suínas. Foram coletados os seguintes dados de 636 partos e 7.100 leitões nascidos: ordem de parto, número de leitões nascidos vivos, natimortos, mumificados, total de nascidos, aplicação de ocitocina, uso de palpação vaginal, momento do nascimento de cada leitão e do início e final do parto. O intervalo médio de nascimento dos leitões foi de 16,7 minutos e a duração média do parto, de 247 minutos. A duração média do parto aumentou conforme o total de leitões nascidos, o uso de ocitocina e a ocorrência de palpação vaginal. O total de nascimentos nos partos longos (> 211 min), de 13,1 leitões, foi maior que nos partos curtos (< 210 min), de 11,7 leitões, portanto, quanto maior o total de nascidos, maior a duração do parto. As leitegadas foram maiores nas fêmeas de segundo parto (12,8) em comparação àquelas de primeiro parto (11,9). A duração do parto é influenciada pelo total de leitões nascidos, que é maior em fêmeas de segundo parto e está associada à maior ocorrência de leitões natimortos e mumificados.Palavras-chave: leitegada, ordem de parto, suínos Performance parameters linked to the parturition of first and second parturition sowsABSTRACT -This study aimed to identify some performance parameters associated with the farrowing efficiency in sows. From a total of 636 births and 7,100 piglets born, data was collected for: parity (OP), number of piglets born alive (NV), stillborns (NAT), mummified (MUM), total litter size (TN), use of vaginal palpation and oxytocin injection, time of birth for each piglet, and beginning and end of the parturition. The average interval among piglets birth was 16.7 min and the average duration of parturition was 247 min. The average duration of parturition increased regarded to the number of born piglets, the use of oxytocin and with the ocurence of vaginal palpation. The total number of births in the long parturitions (> 211 min), with 13.1 piglets was higher than in the short parturitions (< 210 min), with 11.7 piglets, therefore, the higher the number of total piglets born, the longer is the duration of parturition. Litter size was higher for sows of the second parity (12.8) than for sows of first parity (11.9). The duration of parturition is affected by the number of piglets born, which is higher in second parity than first parity females and it is associated to the higher occurence of stillbirths and mummified piglets.

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Estudo da divergência genética entre raças suínas utilizando técnicas de análise multivariada

Cited by 6 publications

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Use of multivariate analysis to evaluate genetic groups of pigs for dry-cured ham production

Use of multivariate analysis to evaluate genetic groups of pigs for dry-cured ham production

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Indicadores de desempenho relacionado ao parto de fêmeas suínas de primeiro e segundo partos

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