Breed Effect and Effect of Non-Genetic Factors on Performance Traits of Wool Type Angora Rabbits in an Organized Farm of Kashmir

Khan, Nusrat Nabi; Hamadani, Ambreen; Dar, Ahsana; Shabir, Mir; Bukhari, Saba; Shah, R. R.; Ayaz, Adil; Rather, Mohd Ashraf

doi:10.20546/ijcmas.2020.906.086

Cited by 2 publications

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“…Then, the weight of the kits at weaning (WW) depends on the size of the litter, the weight being lower when the litter size is high [ 20 ]; from Table 1 , it is inferred that the average size of the litter at weaning was 5.68 kits, with a WW of 423.7 ± 14.5 gm. This weight was similar to that presented by Agea et al [ 18 ] and Khan et al [ 5 ], but lower than those found by Amao [ 21 ] and Fang et al [ 22 ]. The differences observed in the literature can be attributed to the mother’s milk yield, maternity capacity, and the management during rearing in each farm.…”

Section: Resultssupporting

confidence: 91%

Genetic parameters of growth traits and carcass weight of New Zealand white rabbits in a tropical dry forest area

2021

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Objective: The objective of this study was to estimate the heritability ( h 2 ), repeatability ( r ), and correlations ( r ŷ i y i ) in some traits of zootechnical interest in a population of New Zealand white rabbits of a tropical dry forest area. Materials and Methods: Three mating groups were formed, each one of 1 male and 70 females. The traits evaluated were litter size at birth (LB), born alive (BA), born dead (BD), litter weight born alive (LW), litter weight at weaning (LWW), weaning weight (WW), slaughter weight (SW), and carcass weight (CW). Weaning took place at 42 days, and the fattening phase lasted 60 ± 3 days. A descriptive statistical study was carried out on the study variables. Paternal heritability was estimated ( ) and maternal ( ), repeatability, rabbit index IC, and Pearson’s correlations ( r ŷ i y i ) between traits. The descriptive statistics showed high variation for the BD traits. Results: The values of the productivity found were similar to those presented in studies around the world. h 2 presented magnitudes between low and medium. ranged between 0.09 and 0.42 and between 0.11 and 0.45 for . In general, the values of were higher than the values of . The r values for the traits LB, BA, LW, LWW, and SW presented low magnitude, while it was medium for WW and CW. From the values of r , IC was calculated for each of the rabbits, allowing their categorization, which will be used in future selection plans. r ŷ i y i among the variables ranged from −0.01 to 0.860. They were generally positive and mostly not significant ( p > 0.05); they took a magnitude from low to moderate, except for the correlation between LB and BA. Conclusion: The production of rabbits under tropical conditions is similar to other reports. The genetic parameters evaluated were medium-to-low, indicating a robust non-additive gene and/or environmental effect.

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Section: Resultssupporting

confidence: 91%

Genetic parameters of growth traits and carcass weight of New Zealand white rabbits in a tropical dry forest area

2021

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“…staple length and fiber diameter had the estimated means as 6.33 ± 0.03 cm and 13.18 ± 0.04 µ, respectively, which were in close agreement with other reports in German Angora rabbits (Ramakrishna et al 2004). However, a slightly lower estimate was reported in Angora rabbits by Assad et al 2017 andKhan et al 2020.…”

Section: Performance Traitsmentioning

confidence: 69%

Genetic studies on growth and production traits in German Angora Rabbits under sub-temperate climatic conditions

Rahim¹,

RAJARAVINDRA²,

CHATURVEDI³

et al. 2022

Indian J of Anim Sci

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This study aimed to assess the effect of genetic and non-genetic factors on growth, wool yield and wool characteristics of German Angora rabbit. Data was collected on 607 adult rabbits over a period of four years (2018-2021). The least squares means of body weights (g) at various ages, wool yield (g) at I, II, III and IV clip and wool characteristics assessed by staple length (cm) and fiber diameter (μ) were estimated. Sires of the rabbit progenies demonstrated highly significant effect (P<0.01) on the studied traits except wool characteristics. Sex of the rabbits had significant effect on body weight at 10th, 12th, 14th, 16th, 24th weeks of ages and wool yield at III clip, with greater estimates of females than the males for III clip, staple length, and 24th weeks body weight. Winter and autumn seasons were the most favourable seasons in comparison to summer season for estimated traits. Winter born kits had the highest body weights of 683±20.1, 961±24.3, 1263±27.5, 1484±34.0, 1735±37.1, 1942±40.1, 2136±36.9, 2232±36.7, 2341±37.4 and 2429±37.4 g and the summer born kits had the lowest body weights of 588±22.0, 820±27.2, 1037±31.2, 1307±38.0, 1515.79±41.0, 1696±44.1, 1847±41.4, 1920±41.0, 2034±42.4 and 2139±41.6 g, at biweekly interval from 6th to 24th, respectively. Rabbits with litter size less than six performed better in comparison to other groups for all growth traits and wool yield at I and III clip. The heritability estimates were found positive and high in magnitude for all growth traits, moderate for wool clip at different clips and very low for staple length. Genetic and phenotypic correlations were found to be very high and significant among growth traits and low to moderate among wool traits. The study revealed scope for further improvement in growth and wool yield by adopting selective breeding in the colony.

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Breed Effect and Effect of Non-Genetic Factors on Performance Traits of Wool Type Angora Rabbits in an Organized Farm of Kashmir

Cited by 2 publications

References 4 publications

Genetic parameters of growth traits and carcass weight of New Zealand white rabbits in a tropical dry forest area

Genetic parameters of growth traits and carcass weight of New Zealand white rabbits in a tropical dry forest area

Genetic studies on growth and production traits in German Angora Rabbits under sub-temperate climatic conditions

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