Estimated Mature Weights and Growth Curves for Large White Sows

Solanes, F. Xavier; Stern, Susanne

doi:10.1080/090647001750193486

Cited by 10 publications

(7 citation statements)

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“…The mean mature BW of "Nero di Parma" pigs was 224.6 kg, a value lower than those reported by Solanes and Stern (2001) for Large White sows (ranging between 258 and 285 kg), but higher than those reported by Franci and Pugliese (2007) for Italian autochthonous breeds (reaching a maximum of 200 kg in the Casertana breed). This agrees with the recent history of "Nero di Parma" pigs, which, as above reported, were obtained at the end of the '90s within a crossbred population derived from "white coated" pigs and the Nera Parmigiana breed.…”

Section: Resultscontrasting

confidence: 59%

Effect of sex and season of birth on Gompertz growth curve parameters in “Nero di Parma” pigs

Sabbioni

Beretti

Manini

et al. 2009

Italian Journal of Animal Science

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The growth curves of "Nero di Parma" pigs were studied by applying the Gompertz equation to 1069 body weight (BW) records from 285 pigs (156 females, 129 castrated males) born in 11 outdoor and 5 indoor herds; pigs were fed commercial complete feeds offered ad libitum and, on a limited basis in the outdoor system, diets were integrated with pasture. The parameters of the Gompertz equation were compared with reference to sex and season of birth. Mature BW for castrated males (229.0 kg) was 3.5% greater than that for females (221.3 kg) (P<0.05), but growth rate was 7.6% lower (7.38*10 -3 vs 7.99*10 -3 , respectively) (P<0.05) and age at maturity (205.7 vs 189.6 d, respectively) was 16.1 d greater (P<0.05). Summer and winter born pigs showed a lower mature BW (P<0.05) than those born in other seasons. Summer born pigs grew slower than those born in spring (9.57%), winter (9.58%) and autumn (21.47%) (P<0.05). Earlier maturing pigs were those born in autumn, followed by those born in winter, spring and summer, respectively. Regardless of sex and season of birth, pigs showed their maximum ADG (ADG max ) of 635 g/d at 82.6 kg BW. Castrated males have a lower ADG max than females (622 vs 650 g/d) at a heavier weight (84.2 vs 81.4 kg). Autumn born pigs showed the highest ADG max (695 g/d), reached at 84.9 kg BW. The growth performance of "Nero di Parma" pigs is greater than those reported for Italian domestic pig breeds. The significant effect of the studied environmental factors on the growth curve in this genetic type will make it possible to choose the best rearing conditions in relation to its usual weight at slaughter (>180 kg).

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Section: Resultscontrasting

confidence: 59%

Effect of sex and season of birth on Gompertz growth curve parameters in “Nero di Parma” pigs

Sabbioni

Beretti

Manini

et al. 2009

Italian Journal of Animal Science

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“…Changes in semen quality can occur from host factor effects such as age. Domestic pigs of conventional breeds do not attain mature weight within the first 3 years of life (Solanes & Stern 2001). Thus, it is reasonable to believe that boars would exhibit maximum quality of semen when they have reached full maturity.…”

Section: Discussionmentioning

confidence: 99%

Age‐related changes in semen quality characteristics and expectations of reproductive longevity in Duroc boars

Huang

Liu

et al. 2010

Animal Science Journal

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Quadratic fitting was used to regress semen characteristics of 1441 samples consisting of 12-month collection from 58 Duroc boars against animal age varied from 10 to 80 months. Data was divided into two groups of cool (14.0-22.7 degrees C, RH 81.5%) and hot season (22.9-29.9 degrees C, RH 86.6%), to test effects of age, season and their interactions. Results revealed that young boars of around 1 year old could endure the hot season. The endurance gradually diminished as animals grew. In the hot season animals exhibited peak performance at age around 33 month and it remained for 1 month, while cool-season kept boars could last for 48 months from 16 months old onward. The reproductive longevity should be 51 month in a subtropical environment and it may extend to 70 month if heat stress can be avoided. The estimated total sperm contribution of a Duroc boar would be 1.8 times more when kept below 22 degrees C than in a natural subtropical environment. It is concluded that to maintain Duroc boars as semen donor to at least 4 years of age is feasible in a subtropical environment and boar longevity could reach 6 years old if well kept in a temperate region.

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“…There was a negative and linear effect of parity of biological dams over survivability from the second to the seventh or later parities, while a slightly deviant behavior was observed for primiparous dams ( Figure 2B ). The negative effect of first parity might be associated with a reduced piglet birth weight due to the ongoing body development of dams ( Solanes and Stern, 2001 ; Bunter et al, 2010 ). As shown in Figure 2C , first parity dams produced the lightest piglets ( P < 0.01) in the studied population.…”

Section: Resultsmentioning

confidence: 99%

Investigating pig survival in different production phases using genomic models

Leite

Knol

Garcia

et al. 2021

Journal of Animal Science

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Pig survival is an economically important trait with relevant social welfare implications, thus standing out as an important selection criterion for the current pig farming system. We aimed to estimate (co)variance components for survival in different production phases in a crossbred pig population, as well as to investigate the benefit of including genomic information through single-step genomic BLUP (ssGBLUP) on the prediction accuracy of survival traits compared to results from traditional BLUP. Individual survival records on, at most, 64,894 crossbred piglets were evaluated under two multi-trait threshold models. The first model included farrowing, lactation, and combined post-weaning survival, whereas the second model included nursery and finishing survival. Direct and maternal breeding values were estimated using BLUP and ssGBLUP methods. Further, prediction accuracy, bias, and dispersion were accessed using the Linear Regression validation method. Direct heritability estimates for survival in all studied phases were low (from 0.02 to 0.08). Survival in pre-weaning phases (farrowing and lactation) was controlled by the dam and piglet additive genetic effects, although the maternal side was more important. Post-weaning phases (nursery, finishing, and the combination of both) showed the same or higher direct heritabilities compared to pre-weaning phases. The genetic correlations between survival traits within pre- and post-weaning phases were favorable and strong, but correlations between pre- and post-weaning phases were moderate. The prediction accuracy of survival traits was low, although it increased by including genomic information through ssGBLUP, compared to the prediction accuracy from BLUP. Direct and maternal breeding values were similarly accurate with BLUP, but direct breeding values benefited more from genomic information. Overall, a slight increase in bias was observed when genomic information was included, whereas dispersion of breeding values was greatly reduced. Post-weaning survival (POST) presented higher direct heritability than in the pre-weaning phases and the highest prediction accuracy among all evaluated production phases, therefore standing out as a candidate trait for improving survival. Survival is a complex trait with low heritability; however, important genetic gains can still be obtained, especially under a genomic prediction framework.

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Estimated Mature Weights and Growth Curves for Large White Sows

Cited by 10 publications

References 0 publications

Effect of sex and season of birth on Gompertz growth curve parameters in “Nero di Parma” pigs

Effect of sex and season of birth on Gompertz growth curve parameters in “Nero di Parma” pigs

Age‐related changes in semen quality characteristics and expectations of reproductive longevity in Duroc boars

Investigating pig survival in different production phases using genomic models

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