Maternal heritability and repeatability for litter traits in rabbits in a humid tropical environment

Rastogi, Rakesh K.; Lukefahr, S. D.; Lauckner, F. B.

doi:10.1016/s0301-6226(00)00180-9

Cited by 22 publications

(23 citation statements)

References 19 publications

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“…The newly born kits seemed to be still affected by their mother's uterine environment. The present results confirm those of Lukefahr and Hamilton (1997), Rastogi et al (2000), Al-Saef et al (2008), Nofal et al (2008) and Youssef et al (2008b). The latter authors found that h 2 estimates were higher than those of p 2 for most of litter weight traits.…”

Section: Genetic Parameterssupporting

confidence: 92%

“…Similar results (around 0.1) were reported by several authors (Rastogi et al, 2000;Costa et al, 2004;El-Deghadi, 2005;Iraqi et al, 2006;Gad 2007). …”

Section: Genetic Parameterssupporting

confidence: 90%

“…The relatively higher estimate of repeatability for LBW in both lines is a result of the higher values of p 2 in this trait compared with the other traits. Comparable results (0.09-0.21) were obtained by many authors (Lukefahr and Hamilton, 1997;Rastogi et al, 2000;Al-Saef et al, 2008;Nofal et al, 2008;Youssef et al, 2008b).…”

Section: Genetic Parameterssupporting

confidence: 58%

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Genetic trend in selection for litter weight in two maternal lines of rabbits in Egypt.

Khadiga¹,

Youssef²,

Saleh

et al. 2010

World Rabbit Sci.

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An analysis was carried out to evaluate the results of the selection program of a new synthetic maternal line of Egyptian APRI rabbits and the Spanish V line. The selection criterion was litter weaning weight in both lines based on Best Linear Unbiased Prediction (BLUP) estimations under a repeatability animal model. The studied traits were: litter birth weight, litter weaning weight (at 28 d) and pre-weaning litter gain. Heritability estimates were generally low (0.09 to 0.11) and comparable in both lines. Low to moderate estimates of repeatability were observed for all studied traits (0.15 to 0.31). Estimates of genetic correlations were high (0.77 to 0.97), while permanent environmental effects correlations were mostly lower than genetic correlations (0.47 to 0.87). The genetic trends were also estimated using mixed model methodology and were signifi cant and comparable (34.2 and 32.5 g) for the selected trait (litter weaning weight) in APRI and V lines, respectively. Furthermore, correlated genetic trends were signifi cant ( P<0.05) for other litter weight traits. These results indicate that the current selection program has been effective in achieving genetic improvement in litter weight traits.

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Section: Genetic Parameterssupporting

confidence: 92%

“…Similar results (around 0.1) were reported by several authors (Rastogi et al, 2000;Costa et al, 2004;El-Deghadi, 2005;Iraqi et al, 2006;Gad 2007). …”

Section: Genetic Parameterssupporting

confidence: 90%

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Genetic trend in selection for litter weight in two maternal lines of rabbits in Egypt.

Khadiga¹,

Youssef²,

Saleh

et al. 2010

World Rabbit Sci.

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“…These estimates were in general low values and tended to decrease from birth to weaning. The same trend was observed by Rastogi et al (2000), who reported that the heritability estimate for NBA and NW were 0.12±0.07 and 0.09±0.07, respectively. The lowest estimates were observed in line H which may be in part due to the foundation criteria followed to create this line which was hyperprolificacy .…”

Section: Variance Components For Prolificacy Traitssupporting

confidence: 85%

Genetic analysis of longevity in specialized lines of rabbits

Nagar¹,

Fawzy²

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“…On the contrary, the common environmental effect had the same magnitude as the additive genetic effect. Rastogi et al (2000), Gyovai et al (2008Gyovai et al ( , 2012 and Al-Saef et al (2008) reported also low magnitude for the permanent environmental effect for litter weight with repeatability animal models.…”

Section: Heritabilities Genetic Correlationsmentioning

confidence: 97%

Application possibilities of selection indices in Pannon White rabbits’ breeding programme

Ács

Szendrő

Garreau

et al. 2018

Italian Journal of Animal Science

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Genetic parameters for 21-d litter weight (LW21) and thigh muscle volume (TMV) were estimated, and based on these traits a two-trait selection index was created with the purpose of increasing the efficiency of the Pannon White rabbits' breeding programme. Litter weight at 21 d of age (LW21, n ¼ 22,002) and thigh muscle volume (TMV, n ¼ 8124) measurements (based on computed tomography -CT) were analysed that were recorded between 1992 and 2016. The evaluated animals were reared in 4178 litters and the total number of rabbits involved in the pedigree file was 14,124. LW21 and TMV records were analysed jointly in a two-trait animal model. The estimated heritability for LW21 and TMV were 0.10 ± 0.01 and 0.21 ± 0.02, respectively, and the estimated genetic correlation between these traits was À0.24 ± 0.07. The common environmental effect had the same magnitude (0.10 ± 0.01) as the additive genetic effect. The created selection index constructed to have 50 and 50% contribution of the measured traits. Application possibility of the created index was tested on a given kindling batch. In this case, the first step of the selection procedure was performed either according to the current breeding programme (based on the LW21 breeding values) or based on the two trait selection index. The second step of selection was not changed (based on the TMV breeding values). The consequences of using index scores instead of the regular procedure were obtaining 27.8% higher average breeding value for TMV and 11.4% lower average breeding value for LW21. These results suggest that introduction of the index may improve economic efficiency. ARTICLE HISTORY

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Maternal heritability and repeatability for litter traits in rabbits in a humid tropical environment

Cited by 22 publications

References 19 publications

Genetic trend in selection for litter weight in two maternal lines of rabbits in Egypt.

Genetic trend in selection for litter weight in two maternal lines of rabbits in Egypt.

Genetic analysis of longevity in specialized lines of rabbits

Application possibilities of selection indices in Pannon White rabbits’ breeding programme

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