Reproductive efficiency of scanbrown and mahogany mink females, selected for litter size

Brzozowski, M.; Maćkowiak-Kondrak, B.; Głogowski, Robert

doi:10.3920/978-90-8686-760-8_40

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Females in second parity produced more offspring, whereas females in third (and more parities) produced less offspring, compared to females in first parity. This positive effect of second parity was demonstrated previously (Ślaska et al, 2009;Koivula et al, 2010;Brzozowski et al, 2012). The positive effect of breeding 2-yr-old female mink is well known among farmers, and it is common practice to breed approximately 40% of the stock as 2-yr-old females.…”

Section: Effect Of Paritysupporting

confidence: 67%

Heterosis and genetic variation in the litter size of purebred and crossbred mink1

Thirstrup

Larsen

Pertoldi

et al. 2014

Journal of Animal Science

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Crosses between different mink lines from 3 Danish mink farms that use different breeding strategies were studied to estimate heterosis and variance components for litter size. The study was designed to analyze crosses between lines of the same color type, between different color types, and between animals originating from different farms. Effect of heterosis, color type, and variance components were estimated using Average information REML (AI-REML) algorithm implemented in the DMU package for analyzing multivariate mixed models. Females from 7 generations that gave birth to at least 1 offspring were analyzed and the effects of parity and production year were included in the analyses. Genetic trend and the proportions of the total variance explained by the effects of additive genetics (h2), common environment (due to repeated litters from the same female; c2), and dam of the female (granddame of the born litter; d2) were estimated. The results showed that mink of the Black color type potentially produced smaller litters compared to mink of the other studied color types. We found significant general maternal effect of heterosis for litter size. Analyses of specific heterosis showed a significant positive effect of crossing between lines of the same color type. Estimates of variance components revealed h2 levels for farm A, B, and C of 0.15, 0.06, and 0.09, respectively; thus litter size could be selected for in the future. The effect of common environment on litter size was also considerable, with c2 values of 0.005, 0.11, and 0.15 at farms A, B, and C, respectively. In conclusion, we recommend genetic selection as a means of increasing litter size in farmed mink.

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Section: Effect Of Paritysupporting

confidence: 67%

Heterosis and genetic variation in the litter size of purebred and crossbred mink1

Thirstrup

Larsen

Pertoldi

et al. 2014

Journal of Animal Science

View full text Add to dashboard Cite

show abstract

“…Table 2 presents the indicators of mink rearing with respect to the teams overseeing the animals. The average number of born, live kits in a litter obtained for both compared groups falls within the scope established by other authors (Bis-Wencel et al 2006, Dziadosz et al 2010, Brzozowski et al 2012, Konopka et al 2013.…”

Section: Methodssupporting

confidence: 86%

Estimation of the human factor in the form of litter size regulation for the weaning results in mink

Brzozowski

Dzierzanowska-Goryn

Goś

2018

Annals of Warsaw University of Life Sciences - SGGW - Animal Science

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show abstract

Reproductive efficiency of scanbrown and mahogany mink females, selected for litter size

Cited by 2 publications

References 2 publications

Heterosis and genetic variation in the litter size of purebred and crossbred mink1

Heterosis and genetic variation in the litter size of purebred and crossbred mink1

Estimation of the human factor in the form of litter size regulation for the weaning results in mink

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