Pregled bibliografske jedinice broj: 1257824
Long-term changes in genetic mean and genic variance and underlying allele frequencies in breeding programmes
Long-term changes in genetic mean and genic variance and underlying allele frequencies in breeding programmes // Proceedings of 12th World Congress on Genetics Applied to Livestock Production (WCGALP) / Veerkamp, Roel ; de Haas, Yvette (ur.).
Wageningen: Wageningen Academic Publishers, 2022. str. 845-848 doi:10.3920/978-90-8686-940-4_198, (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 1257824 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Long-term changes in genetic mean and genic
variance and underlying allele frequencies in
breeding programmes
Autori
De Oliveira Junior, Gerson ; Spehar, Marija ; Schenkel, Flavio ; Baes Christine ; Gorjanc, Gregor
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Proceedings of 12th World Congress on Genetics Applied to Livestock Production (WCGALP)
/ Veerkamp, Roel ; de Haas, Yvette - Wageningen : Wageningen Academic Publishers, 2022, 845-848
ISBN
978-90-8686-940-4
Skup
12th World Congress on Genetics Applied to Livestock Production (WCGALP)
Mjesto i datum
Rotterdam, Nizozemska, 03.07.2022. - 07.07.2022
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
allele frequencies ; genic variance ; breeding programmes ; genetic variance
Sažetak
The infinitesimal model assumes that polygenic traits are influenced by (infinitely) many quantitative trait loci with (infinitely) small effects and that selection on such traits has minimal impact on the frequency of alleles at individual loci, hence minimal impact on genetic variance. Here we evaluated trends in genetic mean and genic variance for milk yield over 25 years in 9, 403 proven and genotyped bulls from the Canadian Dairy Network. The results showed significant change in genetic mean and minor change in genic variance, supporting the infinitesimal model. A detailed analysis of SNP marker allele frequencies indicated sizeable changes at individual loci. We grouped the SNP markers by their initial allele frequency and direction of change, to indicate how these groups of makers contribute to changes in mean and variance in the analysed period of 25 years and predictions for the next 75 years showing sizeable changes in mean and variance.
Izvorni jezik
Engleski
Znanstvena područja
Poljoprivreda (agronomija)
