1. Estimation of genetic parameters for farrowing traits in purebred Landrace and Large White pigs
- Author
-
Makoto Kimata, Kazuo Ishii, Shinichiro Ogawa, Yoshinobu Uemoto, Masahiro Satoh, and Ayane Konta
- Subjects
Litter (animal) ,Litter Size ,Swine ,Gestational Age ,Biology ,Genetic correlation ,genetic parameter ,03 medical and health sciences ,Animal science ,Quantitative Trait, Heritable ,farrowing traits ,Animals ,Birth Weight ,Genetic Association Studies ,030304 developmental biology ,0303 health sciences ,Reproduction ,female pigs ,0402 animal and dairy science ,Large white ,04 agricultural and veterinary sciences ,General Medicine ,Original Articles ,number born alive ,040201 dairy & animal science ,Phenotype ,repeatability model ,Female ,Original Article ,Breeding and Genetics ,General Agricultural and Biological Sciences ,Gestation length ,Purebred - Abstract
Genetic parameters were estimated for six reproductive traits related to farrowing events in Landrace and Large White pigs; total number born (TNB), number born alive (NBA), number stillborn (NSB), total litter weight at birth (LWB), mean litter weight at birth (MWB), and gestation length (GL). We analyzed 62,534 farrowing records for 10,637 Landrace dams and 49,817 farrowing records for 8,649 Large White dams. Estimated heritabilities of TNB, NBA, NSB, LWB, MWB, and GL by single‐trait repeatability model analyses were 0.12, 0.12, 0.08, 0.18, 0.19, and 0.29, respectively, in Landrace, and 0.12, 0.10, 0.08, 0.18, 0.16, and 0.34, respectively, in Large White. Genetic correlation between NBA and NSB was unfavorable: 0.20 in Landrace and 0.33 in Large White. Genetic correlations of GL with the other five traits were weak: from −0.18 with NSB to −0.03 with NBA in Landrace, and from −0.22 with NSB to −0.07 with NBA in Large White. LWB had a highly favorable genetic correlation with NBA (0.74 in both breeds), indicating the possibility of using LWB for the genetic improvement of NBA.
- Published
- 2019