2019
DOI: 10.3168/jds.2018-15333
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Genomic selection of milk fatty acid composition in Sarda dairy sheep: Effect of different phenotypes and relationship matrices on heritability and breeding value accuracy

Abstract: Fatty acid (FA) composition is one of the most important aspects of milk nutritional quality. However, the inclusion of this trait as a breeding goal for dairy species is hampered by the logistics and high costs of phenotype recording. Fourier-transform infrared spectroscopy (FTIR) is a valid and cheap alternative to laboratory gas chromatography (GC) for predicting milk FA composition. Moreover, as for other novel phenotypes, the efficiency of selection for these traits can be enhanced by using genomic data. … Show more

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Cited by 40 publications
(25 citation statements)
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“…Apart from BACT, genetic parameter estimates from the pedigree-based approach ( A matrix) were very similar or slightly smaller compared to the H matrix approach (i.e., additionally considering genomic marker data). This result is in agreement with other studies focusing on genetic parameter estimations based on different genetic relationship matrices [26,27]. Basic dairy cattle habits (e.g., HACT, NACT and FEED) underlie moderate genetic control.…”
Section: Discussionsupporting
confidence: 92%
“…Apart from BACT, genetic parameter estimates from the pedigree-based approach ( A matrix) were very similar or slightly smaller compared to the H matrix approach (i.e., additionally considering genomic marker data). This result is in agreement with other studies focusing on genetic parameter estimations based on different genetic relationship matrices [26,27]. Basic dairy cattle habits (e.g., HACT, NACT and FEED) underlie moderate genetic control.…”
Section: Discussionsupporting
confidence: 92%
“…Indeed, specific FA of dairy products can affect human health and can have an important role in the prevention of metabolic diseases. This increasing attention is also demonstrated by recent studies that investigated the feasibility of improving milk FA profile in sheep and goats though breeding schemes [1][2][3]. A significant amount of attention has been focused in the last decade on polyunsaturated fatty acid of the omega3 family (PUFA n-3) and conjugated linoleic acid (CLA) concentrations of dairy products.…”
Section: Introductionmentioning
confidence: 99%
“…SEM = standard error of means; 2 MvsC = Milk vs. Cheese;3 Fatty acids: expressed as mg/100 mg of FAME; ** p ≤ 0.01, * p < 0.05, ns not significant p ≥ 0.05.…”
mentioning
confidence: 99%
“…For this reason, several studies have explored the phenotypic and genetic relationships of milk FA with yield and composition [6,8,9]. In addition, the genetic aspects of FA and their possible use in genomic selection have been investigated also in sheep [10,11] and goat [12,13] milk. Recently, the laboratory of the Breeders Association of Veneto Region (Padova, Italy) has expanded the range of information provided in the frame of the monthly milk recording procedures, including the FA profile in addition to more traditional milk composition traits such as fat, protein, casein, lactose and urea content.…”
Section: Introductionmentioning
confidence: 99%