EFFECT OF STRAINS AND SEXING ON PERFORMANCE AND CARCASS YIELD OF BROILERS

Api, Ivandro; Takahashi, Sabrina Endo; Mendes, Angélica Signor; Paixão, Sandro José; Refati, Rosana; Restelatto, Rasiel

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Ciência Animal Brasileira

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ZOOTECNIA • Ciênc. anim. bras. 18 • 2017 • https://doi.org/10.1590/1089-6891v18e-32691 copy

EFFECT OF STRAINS AND SEXING ON PERFORMANCE AND CARCASS YIELD OF BROILERS

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract:

We carried out this study to evaluate the productive performance and carcass yield of different strains and sexing of broilers. We evaluated 576 birds of Cobb, Ross, and Hubbard strains, arranged in male, female or mixed sexing, slaughtered at 45 days of age. We used a completely randomized design (CRD), in a 3 X 3 factorial (strain X sex), with four replicates per treatment. Body weight, weight gain, feed intake, and feed conversion showed significant differences in the course of the phases evaluated; however, they were similar at the end of the study period. Males showed superior results compared to females and mixed sexing. Carcass yield showed no significant differences among strains and sexing of birds; however, in some prime cuts, Cobb presented the best results.

Keywords:
consumer market; genetics; poultry; technology

	Cobb	Ross	Hubbard	Macho	Fêmea	Misto	CV
1 - 7 dias
Peso médio (g)	180,87^a	178,96^a	156,12^b	177,80^ns	165,8^ab	172,33^ns	8,36
Ganho Peso (g)	133,16^a	131,67^a	116,84^b	133,43^ns	121,22^ns	127,02^ns	11,4
Consumo Ração (kg)	0,21^a	0,20^a	0,17^b	0,20^ns	0,19^ns	0,19^ns	9,56
Conversão Alimentar	1,05^ns	1,03^ns	1,01^ns	1,02^ns	1,08^ns	1,02^ns	12,51
7-14 dias
Peso médio (g)	469,38^a	479,70^a	427,92^b	478,52^ns	439,52^ns	458,96^ns	8,56
Ganho Peso (g)	288,51^ab	300,75^a	271,80^b	300,72^ns	273,71^ns	286,6^ns	9,82
Consumo Ração (kg)	0,37^ns	0,34^ns	0,34^ns	0,38^ns	0,35^ns	0,37^ns	12,06
Conversão Alimentar	1,24^ns	1,22^ns	1,21^ns	1,22^ns	1,23^ns	1,22^ns	5,41
14-21 dias
Peso médio (g)	932,54^ns	942,30^ns	879,59^ns	981,50^a	851,08^b	921,86^a	7,26
Ganho Peso (g)	463,16^ns	462,6^ns	451,67^ns	502,97^a	411,56^b	462,90^a	8,63
Consumo Ração (kg)	0,63^ab	0,64^a	0,59^b	0,66^a	0,58^a	0,62^b	6,37
Conversão Alimentar	1,30^ns	1,30^ns	1,26^ns	1,27^ns	1,31^ns	1,29^ns	3,38
21-28 dias
Peso médio (g)	1495,13^ns	1520,15^ns	1483,40^ns	1600,20^a	1384,64^b	1513,87^a	6,69
Ganho Peso (g)	562,59^ns	577,83^ns	603,84^ns	618,70^a	533,56^b	592,00^a	8,55
Consumo Ração (kg)	0,86^ns	0,94^ns	0,92^ns	0,94^ns	0,87^ns	0,92^ns	8,39
Conversão Alimentar	1,39^ns	1,43^ns	1,37^ns	1,37^b	1,44^a	1,39^ab	4,73
28-35 dias
Peso médio (g)	2194,37^ns	2222,21^ns	2215,54^ns	2379,33^a	2036,81^c	2215,98^b	5,06
Ganho Peso (g)	699,26^ns	702,08^ns	732,13^ns	779,14^a	652,18^b	702,13^b	7,36
Consumo Ração (kg)	1,28^ns	1,29^ns	1,26^ns	1,26^ns	1,26^ns	1,31^ns	12,83
Conversão Alimentar	1,54^ns	1,56^ns	1,49^ns	l,45^b	1,60^a	1,54^ab	6,67
35-42 dias
Peso médio (g)	2824,77^b	2891,72^ab	2963,17^a	3077,86^a	2696,37^c	2905,43^b	4,11
Ganho Peso (g)	630,40^b	669,50^b	747,62^a	698,52^ns	659,55^ns	689,45^ns	10,45
Consumo Ração (kg)	1,12^ns	1,14^ns	1,31^ns	1,30^a	1,09^b	1,18^ab	15,96
Conversão Alimentar	1,58^ns	1,56^ns	1,59^ns	l,54^b	1,61^a	1,58^ab	3,41
42 - 45 dias
Peso médio (g)	3021,62^ns	3062,07^ns	3117,48^ns	3309,68^a	2804,47^c	3087,13^b	3,54
Ganho Peso (g)	196,85^ns	170,37^ns	154,42^ns	231,81^a	108,12^b	181,71^ab	5,35
Consumo Ração (kg)	0,52^b	0,58^a	0,60^a	0,57^ab	0,54^b	0,58^a	7,40
Conversão Alimentar	1,66^ns	1,69^ns	1,67^ns	1,61^c	1,74^a	1,68^b	3,19

Rendimento	Cobb	Ross	Hubbard	Maclio	Fêmea	Misto	CV
Carcaça	80,60^ns	80,77^ns	81,42^ns	81,17^ns	80,83^ns	80,80^ns	1,74
Pele	2,94^ns	3,32^ns	3,62^ns	3,72^ns	3,04^ns	3,13^ns	13,60
Patas	3,73^b	3,78^b	4,05^a	4,13^a	3,48^b	3,94^a	6,46
Fígado	2,05^b	2,25^a	2,06^b	1,95^b	2,29^a	2,13^a	8,20
Moela	1,36^ns	1,35^ns	1,28^ns	1,22^b	1,46^a	1,32^ab	12,34
Coração	0,49^b	0,55^a	0,51^ab	0,49^b	0,53^ab	0,54^a	8,34
Coxa	12,36^b	12,30^b	12,87^a	12,69^ns	12,39^ns	12,45^ns	4,60
Sobrecoxa	13,76^b	14,32^a	14,15^ab	14,61^a	13,85^b	13,78^b	3,65
Asa	12,05^b	12,25^a	12,06^b	11,95^b	12,29^a	12,13^a	8,20
Peito c/ osso	35,98^a	34,49^b	33,66^b	34,43^ns	35,22^ns	34,48^ns	3,74
Dorso	16,27^b	16,89^a	17,25^a	16,94^ns	16,69^ns	16,79^ns	2,89
Gordura ab,	2,59^a	2,56^a	1,97^b	2,11^b	2,83^a	2,19^b	16,99

Universidade Federal de Goiás Universidade Federal de Goiás, Escola de Veterinária e Zootecnia, Campus II, Caixa Postal 131, CEP: 74001-970, Tel.: (55 62) 3521-1568, Fax: (55 62) 3521-1566 - Goiânia - GO - Brazil
E-mail: revistacab@gmail.com

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[1] *Autora para correspondência - sabrinaendo@gmail.com