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Phenotypic population screen identifies a new mutation in bovine DGAT1 responsible for unsaturated milk fat.
Sci Rep ; 5: 8484, 2015 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-25719731
ABSTRACT
Selective breeding has strongly reduced the genetic diversity in livestock species, and contemporary breeding practices exclude potentially beneficial rare genetic variation from the future gene pool. Here we test whether important traits arising by new mutations can be identified and rescued in highly selected populations. We screened milks from 2.5 million cows to identify an exceptional individual which produced milk with reduced saturated fat content, and improved unsaturated and omega-3 fatty acid concentrations. The milk traits were transmitted dominantly to her offspring, and genetic mapping and genome sequencing revealed a new mutation in a previously unknown splice enhancer of the DGAT1 gene. Homozygous carriers show features of human diarrheal disorders, and may be useful for the development of therapeutic strategies. Our study demonstrates that high-throughput phenotypic screening can uncover rich genetic diversity even in inbred populations, and introduces a novel strategy to develop novel milks with improved nutritional properties.
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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Mutação de Sentido Incorreto / Leite / Diacilglicerol O-Aciltransferase Limite: Animais Idioma: Inglês Revista: Sci Rep Ano de publicação: 2015 Tipo de documento: Artigo País de afiliação: Nova Zelândia