Genetic study of litter size and litter uniformity in Landrace pigs
نویسندگان
چکیده
منابع مشابه
Effect of service sire on litter size traits in Czech Large White and Landrace pigs
The proportion of variance for service sire effect was estimated for three litter size traits (numbers of piglets born, born alive, and weaned) in Czech Large White (89 231 litters) and Czech Landrace (28 320 litters) pigs. Each trait in the first parity was considered as one trait and that trait in the second and subsequent parities was treated as a repeated trait. Consequently, three two-trai...
متن کاملHeritabilities and genetic correlations for litter size and semen traits in Czech Large White and Landrace pigs.
The objective of the present study was to estimate heritabilities and genetic correlations for semen and litter size traits using full animal model analyses. Litter size data were available from 28,485 Czech Large White and 10,410 Czech Landrace sows farrowing between 1995 and 2008. The number of litter records was 91,922 and 30,937, respectively. Records on semen traits (37,137 ejaculates from...
متن کاملGenetic parameters and trends for litter traits in U.S. Yorkshire, Duroc, Hampshire, and Landrace pigs.
Records on 251,296 Yorkshire, 75,262 Duroc, 83,338 Hampshire, and 53,234 Landrace litters born between 1984 and April of 1999 in herds on the National Swine Registry Swine Testing and Genetic Evaluation System were analyzed. Animal model and restricted maximum likelihood procedures were used to estimate variances of animal genetic (a), maternal genetic (m), permanent environmental, and service ...
متن کاملFactors Affecting Litter Size in Pigs
Litter size in pigs has been defined in a number of ways, depending on the goals of the specific experiment. Number of total piglets, including mummies and stillborns, number of fully formed piglets, excluding mummies but including stillborns, and the number of piglets born alive have all been used as endpoints of litter size research. The end measures are chosen with the idea that the causes o...
متن کاملGenetic analysis of litter size in mice
We performed quantitative trait locus (QTL) mapping analysis for litter size (total number of pups born and/or number of pups born alive) in 255 backcross mice derived from C57BL/6J and RR/Sgn inbred mice. We identified one significant QTL on chromosome 7 and 4 suggestive QTLs on chromosomes 3, 5, 10 and 13. In addition, two suggestive QTLs were identified on chromosomes 1 and 4 for the number ...
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ژورنال
عنوان ژورنال: Revista Brasileira de Zootecnia
سال: 2020
ISSN: 1806-9290,1516-3598
DOI: 10.37496/rbz4920180295