Analysis of Potential Genes and Economic Parameters Associated with Growth and Heat Tolerance in Sheep (Ovis aries)

Abstract

This study explored the potential genes and economic factors that might be associated with growth and heat tolerance in two sheep breeds. Data on growth performance from the third month to six months of age were obtained based on records. In comparison to Aboudeleik lambs, Barki lambs developed considerably greater starting body weight, final body weight, final body weight gain, daily weight gain, and percentage increase in BW/month. Single nucleotide polymorphisms (SNPs) were found between lambs of the two breeds using PCR-DNA sequencing of CAST, LEP, MYLK4, MEF2B, STAT5A, TRPV1, HSP90AB1, HSPB6, HSF1, ST1P1, and ATP1A1 genes. Lambs from each breed were divided into groups based on detected SNPs in genes related to growth. The least squares means of the differentiated groups revealed a significant correlation of detected SNPs with growth and heat tolerance attributes (p ≤ 0.05). Barki lambs elicited greater total variable costs, total costs, total return, and net return values. The Barki sheep provided the best economic efficiency value when comparing the percentage difference between net profit and economic efficiency. Together with economic considerations, SNPs found may be used as proxies for marker-assisted selection of the best breed of sheep for traits related to growth and heat tolerance.

Effects of lipoperoxidation and mitochondrial state on milk yield of dairy cows under technological stress

“…The sympathoadrenal and hypothalamus-pituitary-adrenal (HPA) axes are crucial in the implementation of the action of stress factors (Bagath et al 2019). Recent studies have suggested that catecholamines alter the number and function of lymphocytes exerting an inflammatory effect, while cortisol causes a decrease in the immune system of animals (Ibrahim et al 2023). It has been shown that stress worsens the immune response and causes immunosuppressive effects (Chen et al 2018).…”

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“…These genetic markers, or SNPs, can be used to identify the genetic variation that underlies traits in livestock animals that are economically significant and to better understand how genetic variants connect to various phenotypes (Daw et al, 2005). In order to make it easier to choose breeding animals that will actually improve traits connected to growth, genetically based improvement programs should be created (Ibrahim et al, 2023).…”