A Genetic Study of Pubertal Age, Litter Traits, Weight Loss during Lactation and Relations to Growth and Leanness in Gilts

Abstract

S-755 97 Uppsala, Sweden. A genetic study of pubertal age, litter traits, weight loss during lactation and relations to growth and leanness in gilts.

Genetic variability of age and weight at puberty, ovulation rate and embryo survival in gilts and relations with production traits

“…The large phenotypic and genetic correlations between age and weight at puberty are in close agreement with most available literature estimates (Reutzel and Sumption, 1968;Young et al, 1978;Hutchens et al, 1981 (Reutzel and Sumption, 1968;Young et al, 1978, Hutchens et al, 1981, Rydhmer et al, 1992 …”

Genetic parameters and trends for production and reproduction traits in Thai Landrace sows

“…Hanenberg et al (2001) and Holm et al (2004b). Results regarding the genetic correlation between growth and pubertal age by Rydhmer et al (1992) and those between growth and age at first farrowing by Rydhmer et al (1995) showed a high favorable genetic correlation (−0.31 and −0.61). A negative genetic correlation between ADG and AFC was also found in this study but it was close to zero.…”

Performance Testing of Pigs for Lean Tissue Growth Rate in a Selection Experiment with Low and High Protein Diets: 1. Experimental Design and Efficiency of Selection

“…Culling was also more frequent among the females owing to the design of the experiment, with farrowing in batches. The main reasons for culling females were, apart from illness, anoestrus and recycling after the first mating (Rydhmer et al, 1992).…”