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

Imboonta, Nalinee; Rydhmer, Lotta; Tumwasorn, Sornthep

doi:10.1016/j.livsci.2006.12.001

Cited by 11 publications

(22 citation statements)

References 21 publications

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“…While the genetic parameters from different populations for same traits are usually very close or fluctuate in a small range. Heritabilities for TNB (approximately 0.10) in this study were consistent with published literatures, for instance, Danish Landrace and Yorshire pigs (Estany & Sorensen, 1995;Nielsen, Su, Lund, & Madsen, 2013), Landrace in Thailand (Imboonta, Rydhmer, & Tumwasorn, 2007), Landrace in Norway (Lundgren et al, 2010), Yorkshire and Landrace population in Canada (Roehe & Kennedy, 1995), a Large White pig population in Japan (Tomiyama, Kubo, Takagi, & Suzuki, 2011) and China pig population (Zhang et al, 2016). In addition, these calculation were consistent with the meta-analysis calculated of 0.08 by Akanno, Schenkel, Quinton, Friendship, and Robinson (2013).…”

Section: Additive Genetic Variance and Heritabilitiessupporting

confidence: 92%

Estimation of genetic parameters for reproductive traits in connectedness groups of Duroc, Landrace and Yorkshire pigs in China

Zhang

Olasege

et al. 2019

J Animal Breeding Genetics

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The objective of this study was to estimate group‐ and breed‐specific genetic parameters for reproductive traits in Chinese Duroc, Landrace, and Yorkshire populations. Records for reproductive traits between April 1998 and December 2017 from 92 nucleus pig breeding farms, which were involved in the China Swine Genetic Improvement Program, were analysed. Due to weak genetic connectedness across all farms, connectedness groups consisting of related farms were used. Three, two and four connectedness groups for Duroc, Landrace and Yorkshire were firstly established according to the genetic connectedness rating among farms. For each connectedness group a five‐trait animal model was implemented, and via restricted maximum likelihood procedure the genetic parameters were estimated for five reproductive traits i.e., total number born (TNB), number born alive (NBA), litter weight at farrowing (LWF), farrowing interval (FI) and age at first farrowing (AFF). The average of heritabilities among connectedness groups ranged from .01 (for FI in Yorkshire) to .30 (for AFF in Duroc). Estimates of repeatability for litter traits ranged from .14 to .20 and were consistent for each breed, and for FI, the estimates varied from .01 to .11 across breeds and groups. The estimated genetic correlations among litter traits (i.e., TNB, NBA and LWF) were all significantly high (>.56) and similar across breeds. Averaged genetic correlations over three breeds were −.25, −.27, −.18, −.04, −.10, −.02, and .28 for FI‐TNB, FI‐NBA, FI‐LWF, AFF‐TNB, AFF‐NBA, AFF‐LWF and FI‐AFF, respectively. The standard errors of the estimates were all very low (<0.01) in most situations. Results from this study suggest that selection based on TNB which is currently used in dam line selection index can improve NBA and LWF simultaneously. However, care should be taken on FI and AFF as they are both greatly influenced by non‐genetic factors such as management and measurement.

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Section: Additive Genetic Variance and Heritabilitiessupporting

confidence: 92%

Estimation of genetic parameters for reproductive traits in connectedness groups of Duroc, Landrace and Yorkshire pigs in China

Zhang

Olasege

et al. 2019

J Animal Breeding Genetics

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“…Imboonta et al. () used Landrace records from 4,163 young boars and 15,171 gilts tested between 1993 and 2005 and reported a heritability estimate of 0.31 for ADG. Kapell et al.…”

Section: Resultsmentioning

confidence: 99%

“…Numerous studies have reported genetic correlations between production and reproduction traits based on different populations. Holm, Bakken, Klemetsdal, and Vangen () and Imboonta, Rydhmer, and Tumwasorn () described several sow reproduction traits that had moderate to high genetic correlations with various production traits. Moreover, Wolf, Žáková, and Groeneveld () found non‐zero genetic correlations between production and reproduction traits and recommended joint genetic evaluation.…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters and trends for production traits and their relationship with litter traits in Landrace and Yorkshire pigs

Lopez

Song

Seo

2018

Animal Science Journal

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Genetic parameters and trends in the average daily gain (ADG), backfat thickness (BF), loin muscle area (LMA), lean percentage (LP), and age at 90 kg (D90) were estimated for populations of Landrace and Yorkshire pigs. Additionally, the correlations between these production traits and litter traits were estimated. Litter traits included total born (TB) and number born alive (NBA). The data used for this study were obtained from eight farms during 1999 to 2016. Analyses were carried out with a multivariate animal model to estimate genetic parameters for production traits while bivariate analyses were performed to estimate the correlations between production and litter traits. The heritability estimates were 0.52 and 0.43 for ADG; 0.54 and 0.45 for BF; 0.25 and 0.26 for LMA; 0.54 and 0.48 for LP; and 0.56 and 0.46 for D90 in the Landrace and Yorkshire breeds, respectively. The ADG and D90 showed low genetic correlation with BF and LP. The LMA had -0.40, -0.32, 0.49, and 0.39 genetic correlations with ADG, BF, LP, and D90, respectively. Genetic correlations between production and litter traits were generally low, except for the correlations between LMA and TB (-0.23) in Landrace and ADG and TB (-0.16), ADG and NBA (-0.18), D90 and TB (0.19), and D90 and NBA (0.20) in Yorkshire. Genetic trends in production traits were all favorable except for LMA.

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“…When they also included the effect of the sows' mother, the direct heritability decreased to 0.12. Slightly higher estimates of heritability for WSI are reported from a tropical environment by Imboonta et al (2007), with heritabilities of 0.16 for the first two parities. In that study the interval was limited to 50 days and transformed like in the current study.…”

Section: Genetics Of Reproduction and Correlation With Piglet Growthmentioning

confidence: 93%

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

et al. 2010

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

Cited by 11 publications

References 21 publications

Estimation of genetic parameters for reproductive traits in connectedness groups of Duroc, Landrace and Yorkshire pigs in China

Estimation of genetic parameters for reproductive traits in connectedness groups of Duroc, Landrace and Yorkshire pigs in China

Genetic parameters and trends for production traits and their relationship with litter traits in Landrace and Yorkshire pigs

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

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