Performance and genetic parameters of economically important traits of Black Bengal goat

Abstract

A nucleus-breeding flock of selected Black Bengal goat was established in the Bangladesh Livestock Research Institute (BLRI) with the objective of conservation and improvement of the breed. A total of 120 does of different generations (70=foundation stock, 45=First generation and 5=Second generation) and 20 bucks (15=Foundation stock and 5=First generation) were used to study the genetic parameters of Black Bengal goat on productive and reproductive traits. Animals were bred naturally. Goats were reared under intensive and semi-intensive management to compare performance. Birth weights of kids were 1.49±0.13 and 1.28±0.11 kg, respectively for intensive and semiintensive rearing system. Number of services required for each successful conception was 1.16±0.019 with an average gestation length of 143.33±0.68 days. Litter size increased (P<0.001) linearly with parity. Average litter size of Black Bengal goat was 1.94±0.06. Rearing system, season, parity, generation and generation × parity interaction did not affect (P>0.05) the post partum estrous interval. Young females attained puberty at an age and weight of 186.02±10.52 days and 9.4±0.52 kg, respectively. In case of intensive rearing system it took 139 days to show 1st heat compared to 198 days in semi-intensive rearing system. Intensive system reduced the age at 1st kidding to 284±31.2 days from 370±25.5 days in semi-intensive system. The effects of parity, generation, and generation × parity interaction on kidding interval were not significant (P>0.05). The average daily milk yield and lactation length was 1.088 kg (750g suckled milk + 338g from hand milking) and 68.07±2.83 days respectively. The effect of parity and generation on doe weight after kidding was significant (P<0.01) but the effect of generation × parity interaction was not significant (P>0.05). Heritability estimates from sire and dam component for birth weight, weight at 3, 6, 9, 12 months of age and litter size were 0.92, 0.48, 0.34, 0.45, 0.88 and 0.17, respectively. Heritability estimates only from sire component for birth weight, weight at 3, 6, 9, 12 months of age and litter size were 0.05, 0.28, 0.77, 0.29, 0.18 and 0.15, respectively. Repeatability estimates for birth weight, litter size, kidding interval and daily milk yield were 0.47, 0.15, 0.02 and 0.49, respectively. Keywords: Black Bengal goat; Performance traits; Heritability; Repeatability DOI: 10.3329/jbau.v8i1.6401J. Bangladesh Agril. Univ. 8(1): 67-78, 2010

Selection of Black Bengal Buck Based on Some Reproductive Performance of Their Progeny at Semi-Intensive Rearing System

“…For gestation length flock effect and generation effect was not significant. Similar results was reported by Faruque et al (2010) for generation one143.00 days and generation two 141.25 days. The effect of parity on gestation length was found to be non-significant in the present study.…”

“…Trends of increasing the litter size and litter weight are observed with the advancement of generation and parities (Table 2). Similar results was reported by Faruque et al (2010) for litter size at birth of (1.33 to 1.77) and litter weight at birth (1.27 to 2.21kg) increased significantly (P<0.01) as parity progressed. Hussain et al (2004) noticed that among the four parities, kid's birth weight was lowest in 1st parity does compared to 2nd, 3rd and 4th parity.…”

Assessment of performance and livelihood generated through community based goat production in Bangladesh

“…Husain et al (1996) reported that weight at birth varied significantly (p<0.01) according to sex in Black Bengal goats, the male kids have higher birth weight (1.06±0.02 kg) than females (0.93±0.02 kg) which are similar to this study. Faruque et al (2010) reported that birth weight of kids of Black Bengal goat were 1.49±0.13 and 1.28±0.11 kg, respectively for intensive and semi intensive rearing system. Paul (2012) reported that average birth weight (kg) of kids of Black Bengal goat in Nucleus Breeding Flock (NBF) at Bangladesh Agricultural University, Modhupur, and Nilphamari were 1.09±0.27, 1.09±0.25 and 1.10±0.27 kg, respectively.…”

Evaluation of productive and reproductive performance of Black Bengal goat

“…In spite of promises of Black Bengal goat amongst the world goat genetic resource the systematic information on production parameters in Black Bengal goat is very limited, although a lot of work has been done on various parameters of Black Bengal goat including productive and reproductive traits (Amin et al 2001;Faruque et al 2010). It is essential to compile the parameters by which Black Bengal goat can be described distinctively from others, which will be helpful for the breeders as well as farmers for the selection of goat.…”