Genetic analysis of juvenile growth and carcass traits in a full diallel mating in selected colored broiler lines

Abstract

The juvenile growth and carcass traits were evaluated in a 4 × 4 full diallel crossing involving four colored broiler chicken lines viz., Naked neck (NN), Dwarf, Punjab Broiler-1 (PB-1), and Punjab Broiler-2 to study the performance and crossbreeding parameters. The data on 2,280 chicks were analyzed using least squares techniques to assess the effect of genetic group, and the significant traits were further analyzed for crossbreeding parameters. Genetic group had significant influence on the body weights and carcass traits. The cross of PB-1 × NN recorded significantly (p ≤ 0.05) higher body weight at 6 weeks of age. The data revealed that general combining ability (GCA), specific combining ability (SCA), maternal ability (MA), sex-linked effect (SE), and purebred effects significantly influenced the growth and carcass traits in the broiler crosses. The crossbred PB-1 × NN showed positive heterosis for growth as well as carcass traits. The results suggest that GCA, SCA, SE, and MA are important in the inheritance of the body weights and carcass traits indicating the presence of both additive and nonadditive genetic variation along with reciprocal effects. Therefore, pure line selection along with development of specialized sire and dam lines followed by crossing will improve the growth performance and benefit the poultry farmers. It is concluded that PB-1 as a male line and NN as a female line performed significantly higher, therefore, may be used for improving the performance of colored broilers.

Heritability Estimates of Adult Body Weight and Egg Production Traits in Indigenous Uttara Chickens

“…The heritability estimates at 40 weeks egg production were similar with the findings of [10] in IWP strain of WLH (h 2 d), [23] in Dwarf chicken (h 2 D), [24,22] in IWH and IWI (h 2 s). However, lower estimates heritability was reported [24] in chicken (h 2 s and h 2 s+d), [22] in IWI (h 2 d and h 2 s+d) and [12] at 40 weeks interval. The higher estimates of heritability were reported [10] in IWN strain of WLH (h 2 d) and (h 2 s+d) and [25] at 40 weeks of egg production.…”

“…The 40 weeks estimates of heritability were comparable with [10] and [22] in IWI (h 2 s). Lower estimates of heritability were reported [23] in dwarf chicken (h 2 d) and (h 2 s+d), [24,25] in 'IWN' strain of WLH, and [22] in IWH (h 2 s), (h 2 d) and (h 2 s+d) of WLH and IWI (h 2 d) of WLH. However, higher estimates of heritability were reported [23] in Dwarf chicken (h 2 s), [18,25] in 'IWP' strain of WLH and [22] IWI (h 2 s) and (h 2 s+d) of WLH.…”

Studies on growth, carcass and meat quality traits in Aseel crosses suitable for small scale intensive broiler farming

“…The dressing percentage (DP) and breast meat proportion were statistically similar, though Aseel × PD-1 cross recorded numerically higher DP and breast meat. The DP observed was within the normal range (65-75%) as observed by many authors in chicken (Rajkumar et al 2011;Haunshi et al 2013;Sarsenbek et al 2013;Rajkumar et al 2016). The breast meat proportion was lower in the present study compared to the normal broilers, which were selected for broader breast (Rajkumar et al 2016).…”

Analysis of (co) variance components and estimation of breeding value of growth and production traits in Dahlem Red chicken using pedigree relationship in an animal model

“…Many authors estimated the genetic parameters without considering the maternal effects in chicken [9][10][11][12][13][14][15][16]. Some publications with additive, maternal and permanent effects on various economic traits using animal model [4,17] and diallel analysis [10,18] were reported in chicken. However, studies with large data sets over the generations utilizing an animal model in PD-3 line are limited from India.…”