Association between leptin gene single nucleotide polymorphisms and carcass traits in pigs

Abstract

It was investigated the association between leptin gene single nucleotide polymorphisms (SNPs) T2411C and T3266G with carcass traits in F2 pigs obtained by crossing native Brazilian Piau with commercial sows composed of Landrace, Large White and Pietrain breeds. Association analyses were performed using a statistical model that included genotype, sex, and batch as fixed effects, sire and error as random effects. The T2411C SNP was associated with skinless and fatless boston shoulder weight (BSW), backfat thickness at last rib, 6.5 cm from the midline (P2), skinless and fatless picnic shoulder weight, and sirloin weight (SLW). The T3266G mutation was associated with slaughter age, bacon weight, BSW, midline backfat thickness between last and last but one lumbar vertebra, midline backfat thickness at last rib, P2 and rib weight. Phenotypic associations were also performed by combining genotypes for both SNPs. Associations with P2, carcass yield, total boston shoulder weight, and SLW were observed. The results obtained demonstrate that the SNPs analyzed have potential to be explored as markers for carcass composition in pigs.

Effects of nutritional plans and genetic groups on performance, carcass and meat quality traits of finishing pigs

“…Moreover, the discrepancy from each paternal breed that was used in the present study to compose the genetic groups affected the performance traits. Duroc pigs have a high BW gain as one of the main characteristics of the breed (Wood et al, 2004), while Pietrain pigs have a low feed intake (Bertol et al, 2013) compared to other genetically improved breeds, and the Piau breed is mainly characterized by its slow growth rate (Faria et al, 2009;Peixoto et al, 2009). The low feed intake of Pietrain compared to Duroc crossbred gilts is due to the selection process for a low feed conversion rate and high lean growth that Pietrain has undergone, which has negatively impacted their voluntary intake (Bertol et al, 2013).…”

Recent approaches of fish breeding / Abordagens recentes do melhoramento genético de peixes

“…An important tool for genomic studies is the use of candidate genes, which consist of genes from known biological function and are involved in the development or physiology a particular characteristic (PEIXOTO et al, 2009). Permits the link between genotype and biological function, extending the observation of genetic variation (HEMMER-HANSEN et al, 2011).…”

Progresso científico em melhoramento animal no Brasil na primeira década do século XXI

“…Com enfoque na diversidade gênica, Souza et al (2009) identificaram importante contribuição de raças Ibéricas como origem de raças suínas naturalizadas no Brasil por meio da análise mitocondrial do Citocromo b. Enquanto Sollero et al (2009) construíram um painel de marcadores microssatélites com alta precisão (99,99%) para identificação/exclusão de paternidade em raças naturalizadas do Brasil (Piau, Moura e Monteiro). Band et al (2005a) Peso das metades direita e esquerda da carcaça, área e profundidade do músculo Polimorfismo no gene PSS Band et al (2005b) longíssimus dorsi, gordura subcutânea, peso de cortes comerciais e peso aos 105 dias de idade Peso do fígado, peso do filezinho, perdas ao cozimento e sobre a coloração da carne Polimorfismo no gene IGF1 Faria et al (2009) Peso da copa sem pele e sem gordura, espessura de gordura subcutânea, peso da paleta Polimorfismo no gene da Leptina Peixoto et al (2009) sem pele e sem gordura, peso do filezinho, idade de abate, peso do bacon e peso da costela Peso total do carré, peso da papada, peso do filezinho e peso dos rins…”