Genetic analysis of reproductive performance in Landrace sows and its correlation to piglet growth

Lundgren, H.; Canario, Laurianne; Grandinson, K.; Lundeheim, N.; Zumbach, B.; Vangen, O.; Rydhmer, Lotta

doi:10.1016/j.livsci.2009.12.002

Cited by 21 publications

(16 citation statements)

References 24 publications

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“…Additionally, both the heritability and the permanent environmental effect estimates were consistent with those of the Danish Large White pig population (Estany & Sorensen 1995; 0.11 and 0.086, respectively). In the present study, the heritability of AWW (0.08) was less than that of mean piglet weight in the litter at 3 weeks of age for the first and second parities in the Landrace pig population reported by Lundgren et al . (2010; 0.21), suggesting differences in parity number and management factors such as feeding strategies and weaning age.…”

Section: Discussioncontrasting

confidence: 82%

Evaluation of genetic trends and determination of the optimal number of cumulative records of parity required in reproductive traits in a Large White pig population

Tomiyama

Kubo

Takagi³

et al. 2011

Animal Science Journal

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Genetic improvement of the reproductive performance of pigs is important for pig breeding despite their low heritabilities. The objectives of this study were to investigate the effectiveness of selection concerning reproductive traits and to determine the optimal number of parity records required for accurate estimation of breeding values (BVs) in the open population of a commercial pig breeding company. The study used records of 2220 purebred Large White pigs (9845 litters) farrowed between 1998 and 2009 in the two herds of the Pacific Ocean Breeding Co. Ltd. The traits studied included farrowing interval (FI), total number of piglets at birth (TNB), average weaning weight per litter (AWW), and raising rate (RR). A statistical model was applied to the 4-trait repeatability animal model. The heritabilities of FI, TNB, AWW and RR were low. The genetic trends in TNB (h(2) = 0.09) showed approximately 1.0 increase in 6 years from 2003 to 2008. The predicted error variances indicated that up to fourth parity records are necessary for accurate genetic evaluation. The present study results indicated that even reproductive traits with low heritability can be improved.

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Section: Discussioncontrasting

confidence: 82%

Evaluation of genetic trends and determination of the optimal number of cumulative records of parity required in reproductive traits in a Large White pig population

Tomiyama

Kubo

Takagi³

et al. 2011

Animal Science Journal

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“…Despite the transformation, the distribution of WSI50 was still skewed (Figure 1). The estimated heritabilities in this study for WSI7 (h 2 = 0.12, PSD = 0.05) and WSI50 (h 2 = 0.14, PSD = 0.05) were slightly higher than earlier reported estimates (0.03 to 0.08) from the same population (Holm et al, 2004;Lundgren et al, 2010). Adamec and Johnson (1997) reported a heritability of 0.14 for weaning-to-service interval analysed with no upper limit of days.…”

Section: Heritabilitiescontrasting

confidence: 83%

Genetic parameters for feed intake, litter weight, body condition and rebreeding success in primiparous Norwegian Landrace sows

Lundgren

Fikse

Grandinson

et al. 2014

Animal

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The aim of this study was to estimate genetic parameters for feed intake recorded as farmers' perception of young sows' appetite for the first 3 weeks of lactation (APP) and feed intake recorded for one day in the 3rd week of lactation (FEED), litter weight (LW) at 3 weeks, sow body condition at weaning (BC) and the following five reproduction traits: weaning-to-service interval of 1 to 7 days (WSI7), weaning-to-service interval of 1 to 50 days (WSI50), delayed service or not (DELAYED), pregnant on first service or not (PREGNANT) and litter size in 2nd parity (NBT2). The analyses included data on 4606 Norwegian Landrace 1st-parity sows and their litters. The Gibbs sampling method was used. The traits DELAYED and PREGNANT were analysed as threshold traits and APP, FEED, LW, BC, WSI7, WSI50 and NBT2 were analysed as linear traits. The heritability estimates for APP and FEED were low (<0.1), whereas the estimates for DELAYED and PREGNANT were rather high (0.4 and 0.3). The heritability estimate for BC was 0.2. The genetic correlations confirmed the complexity of breeding for sow performance; selection for heavy 1st litters may lead to lower body condition at weaning, which in turn leads to lower reproductive performance and smaller litters in 2nd parity. Selection for higher sow feed intake would improve body condition, but the simple way of measuring feed intake tested in this study (APP and FEED) cannot be recommended because of the low heritability obtained for these traits.

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“…In their study, heritability for body condition during lactation was estimated at 0.13 and after weaning the lambs at 0.15. The heritability estimate for mean piglet weight in this study (0.23) was comparable with previously published reports (Hö gberg and Rydhmer, 2000) and previous estimates from the Norwegian Landrace population Lundgren et al, 2010).…”

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confidence: 92%

Heritability of shoulder ulcers and genetic correlations with mean piglet weight and sow body condition

Lundgren

Zumbach

Lundeheim

et al. 2012

Animal

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The objective of this paper was to estimate the heritability for shoulder ulcers and the genetic correlations between shoulder ulcers, mean piglet weight and sow body condition. The analyses were based on information on 5549 Norwegian Landrace sows and their 7614 purebred litters. The genetic analysis was performed using the Gibbs sampling method. Shoulder ulcers were analyzed as a threshold trait. Sow body condition and mean piglet weight were analyzed as linear traits. The heritability of shoulder ulcers was estimated at 0.25 (s.d. 5 0.03). The heritability for sow body condition was estimated at 0.14 (s.d. 5 0.02) and that for mean piglet weight at 0.23 (s.d. 5 0.02). The genetic correlation between shoulder ulcers and sow body condition was negative (20.59, s.d. 5 0.09). The genetic correlation between shoulder ulcers and mean piglet weight was positive (0.23, s.d. 5 0.10) and the genetic correlation between sow body condition and mean piglet weight was negative (20.24, s.d. 5 0.10).

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Genetic analysis of reproductive performance in Landrace sows and its correlation to piglet growth

Cited by 21 publications

References 24 publications

Evaluation of genetic trends and determination of the optimal number of cumulative records of parity required in reproductive traits in a Large White pig population

Evaluation of genetic trends and determination of the optimal number of cumulative records of parity required in reproductive traits in a Large White pig population

Genetic parameters for feed intake, litter weight, body condition and rebreeding success in primiparous Norwegian Landrace sows

Heritability of shoulder ulcers and genetic correlations with mean piglet weight and sow body condition

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