Tryadi, Wildan (2018) Estimation of Heritability and Breeding Value for Weaning Weight in New Zealand White Rabbit. Sarjana thesis, Universitas Brawijaya.
Abstract
New Zealand White is one of the most commonly raised breeds of rabbit throughout the world. New Zealand White rabbit popularity was long ago extended to the tropics for its high adaptability to warm and humid climates like in Indonesia. Rabbits are an extremely desirable species for backyard meat production, for they are easy to raise, require little input costs and grow rapidly to produce meat high in protein but low in fat. There are several ways that can be done to improve livestock productivity besides management practices. Selection is one of the methods used to increase productivity in rabbit. Genetically, selection should be based on the trait that has moderate to high heritability value. Generally, heritability value for weaning weight has high value, it indicates the selection will effective and efficient based on heritability of weaning weight. The aim of this research was to estimate the heritability and breeding value for weaning weight in New Zealand White rabbit, then can be used as a reference for breed selection to obtain superior rabbit. This research was conducted at Aji Jaya Farm, Batu City on November 2017 until January 2018. Hundred three heads of offsprings generated from 8 bucks and 20 does were used in this study and supported with recording of production and pedigree. The sample determination use purposive sampling. The research method used is case study and direct observation in the field. Measured variables is weaning weight at 40 days. Estimates of heritability values were analyzed using half-sib and full-sib correlation method and variance component calculated using analysis of variance (ANOVA) nested classification. The result of this study showed that mean of weaning weight in New Zealand White Rabbit (40 days) was 0.83±0.17 kg. The heritability value for weaning weight (40 days) based on sire component was 0.47±0.24, dam component of 1.17±0.24 and sire and dam component of 0.82±0.24 categorized as high heritability. The results of breeding value, three sires (37.5%) has positive breeding value, it means that the offsprings of the sires has weaning weight above the mean of population. Five sires (62.5%) has negative breeding value, this value means the offsprings of the sires has weaning weight below the mean of population. Based on the result of this research, it can be concluded that weaning weight can be used as selction criteria. The best 3 sires can be used as superior bucks for breeding. Some of male kitts from the best sire on the rank must be kept as buck replacment stock.
English Abstract
The research was conducted in Aji Jaya Farm, Batu City from November 2017 to January 2018. The study was aimed to estimate the heritability and breeding value for weaning weight in New Zealand White rabbit. Hundred three heads of offsprings generated from 8 bucks and 20 does were used in this study. The data of kitt weaning weight was analyzed for component variance using analysis of variance (ANOVA) nested design. Heritability was estimated using half-sib and full-sib correlation method. Result showed that average of weaning weight (40 days) was 0.83±0.17 kg. The heritability value for kitt weaning weight (40 days) based on sire component was 0.47±0.24, dam component of 1.17±0.24 then sire and dam component of 0.82±0.24, those results categorized high heritability, so weaning weight can be used as selection criteria. The results of Breeding Value (BV), three (37.5%) sires has positive breeding, so it can be used as superior sires for breeding.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FPT/2018/457/051808722 |
| Uncontrolled Keywords: | Sires, Ranks and Selection |
| Subjects: | 600 Technology (Applied sciences) > 636 Animal husbandry > 636.9 Other mammals > 636.932 2 Other mammals (Oryctolagus (Old World rabbit)) |
| Divisions: | Fakultas Peternakan > Peternakan |
| Depositing User: | soegeng sugeng |
| Date Deposited: | 01 Jun 2020 02:59 |
| Last Modified: | 01 Jun 2020 02:59 |
| URI: | http://repository.ub.ac.id/id/eprint/168274 |
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