Abstract
ABSTRACT Griller-type chickens are broilers slaughtered between27and 29 days old weighing 1.3 to 1.5 kg and sold as a whole carcasses. The aim of the present study was to evaluate the growth performance, carcass traits, and meat quality of female broilers of four genetic lines reared for the production of griller-type chickens. A total of 960 broiler chicks was allotted in a randomized block design with four treatments and eight replicates of 30 birds per experimental plot. Each experimental treatment consisted of four different commercial lines, identified as A, B, C and D. The analyzed parameters were weight gain, feed intake, feed conversion ratio, livability, production efficiency index, carcass and cut yields, and meat quality according to breast meat color (L*, a*, b*), water-holding capacity (WHC), cooking losses, and shear force. Weight gain, feed intake, feed conversion ratio, and livability were different (p<0.05) among the lines; however, no differences were observed for the production efficiency index. Results show that lines presented similar performance; however, lines A, B, and C had a better carcass and breast yield, and line A, the best meat quality. Therefore, line A would be the most suitable for the production of griller-type chickens.
Highlights
Brazil is the world’s second largest producer of chicken meat, with an annual production of 13,146 million tons, ranking as the world’s largest exporter, with approximately 4,304 million tons of chicken meat marketed in 2015 (ABPA, 2016)
A griller is a whole frozen carcass commercially known as griller-type chicken, obtained from 27- to 29-d-old broilers with 1.3 to 1.5 kg live weight and feed conversion ratio of 1.5 kg of feed per 1 kg of meat (Olivo, 2006)
Havenstein et al (2003) reported that genetic selection accounts for 85% of the improvement in the performance of broiler chickens
Summary
Brazil is the world’s second largest producer of chicken meat, with an annual production of 13,146 million tons, ranking as the world’s largest exporter, with approximately 4,304 million tons of chicken meat marketed in 2015 (ABPA, 2016). One the exported products is whole carcass, known as a griller. A griller is a whole frozen carcass commercially known as griller-type chicken, obtained from 27- to 29-d-old broilers with 1.3 to 1.5 kg live weight and feed conversion ratio of 1.5 kg of feed per 1 kg of meat (Olivo, 2006). The production of griller-type chickens is based on high housing density (15-17 birds/m2), with the objective of reducing costs and maximizing income to the farmer (Arruda, 2013). According to Avila et al (1993), Souza et al (1994), Stringhini et al (2003) and Janisch et al (2011), the objectives of studies evaluating broiler genetics are to improve their performance, and carcass and parts traits
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