Exploring polymorphisms and effects of candidate genes on milk fat quality in dairy sheep

被引：36

作者：

Crisa, A. ^{[1
]}

Marchitelli, C. ^{[2
]}

Pariset, L. ^{[2
]}

Contarini, G. ^{[3
]}

Signorelli, F. ^{[1
]}

Napolitano, F. ^{[1
]}

Catillo, G. ^{[1
]}

Valentini, A. ^{[2
]}

Moioli, B. ^{[1
]}

机构：

[1] Consiglio Ric & Sperimentaz Agr, I-00015 Monterotondo, Italy

[2] Univ Tuscia, Dept Anim Prod, I-01100 Viterbo, Italy

[3] Ctr Ric Prod Foraggere & Lattiero Casearie, I-26900 Lodi, Italy

来源：

JOURNAL OF DAIRY SCIENCE | 2010年 / 93卷 / 08期

关键词：

fatty acid; single nucleotide polymorphism; dairy sheep; milk composition; GROWTH-HORMONE RECEPTOR; SINGLE-NUCLEOTIDE POLYMORPHISMS; QUANTITATIVE TRAIT LOCI; GENOME-WIDE SCAN; FACTOR-I GENE; LIPOPROTEIN-LIPASE; TRANSCRIPTION INITIATION; CHROMOSOMAL LOCALIZATION; ACID-COMPOSITION; EXPRESSION;

D O I：

10.3168/jds.2009-3014

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The aim of the present study was to investigate the genetic control of the fatty acid (FA) composition in milk from 3 breeds of sheep: Altamurana, Gentile di Puglia, and Sarda. Single nucleotide polymorphisms within genes, encoding enzymes putatively involved in the synthesis and metabolism of milk fat, were selected for analysis, and the allele substitution effects were determined for 16 genes, which were polymorphic in the 3 sheep breeds, upon the milk fat composition. Four genes (alpha-1-antichymotrypsin-2; diacylglycerol O-acyltransferase homolog-2; propionyl Coenzyme A carboxylase, beta polypeptide; and insulin-like growth factor-I) play a role in the desaturation of stearic FA into polyunsaturated fatty acids. Furthermore, 2 genes (growth hormone receptor and zona pellucida glycoprotein-2) affect the variability of the total fat content in addition to the butyric and stearic FA profile, and the fatty acid synthetase gene has an influence on the medium-chain FA. Milk FA profiles play an important role in dairy sheep farming because they have a large effect on cheese characteristics and also because sheep milk may be marketed as a source of nutraceuticals because it contains higher levels of conjugated linoleic acid than milk from other ruminants. The current study evaluated the global effects of a large number of single nucleotide polymorphisms and haplotypes on traits that are not commonly investigated in sheep but that are potentially very useful for improving milk quality.

引用

页码：3834 / 3845

页数：12

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