Assessment of slaughter value of three broiler chicken genotypes

• Autorzy: Riedel J. , Michalczuk M. , Zdanowska-Sasiadek Z.

Warianty tytułu

PL

Ocena wartości rzeźnej kurcząt z trzech materiałów genetycznych

• Języki publikacji: EN

Abstrakty

EN

The study was conducted to examine slaughter parameters of three genotypes of meat type chicken: F1 crossbred derived from crossing of light hen of indigenous breed Greenleg Partridge with heavy meat type cocks, F2 crossbred being an effect of re-crossing obtained crossbred C x GP with meat type males and medium growing Hubbard JA 957, designed for a longer, 9-week production. Chicken were reared till 63rd day of age. Examined parameters were: dressing percentage, breast and leg meat yield and fatness. F1 crossbred (C x GP) were characterized by rather low body weight, typical for slow growing chicken and good musculature, especially breast. Re-crossing with meat type cocks affected significant (P < 0.01) improvement of the slaughter parameters. F2 crossbred (C x (C x GP) reached high body weight, typical for medium growing chicken. In comparison with Hubbard JA 957 F2 crossbred had lower body weight, the same dressing percentage, better breast and worse leg musculature, and less abdominal fat. High breast meat percentage in carcass and less fatness suggested, that these chickens can be used in meat production, as a medium growing material designed for a longer fattening period (9 weeks).

PL

Ocena wartości rzeźnej kurcząt z trzech materiałów genetycznych. W badaniach porównano kurczęta z trzech grup genetycznych: mieszańce F1 powstałe ze skrzyżowania lekkich kur rasy Zielononóżka kuropatwiana z ciężkimi kogutami typu mięsnego, mieszańce F2, efekt powtórnego krzyżowania powstałego mieszańca Cobb x Zk z kogutami typu mięsnego oraz Hubbard JA 957, przeznaczone do dłuższego chowu (9 tygodni). Kurczęta odchowywano do wieku 63 dni. Oceniano wydajność rzeźną, umięśnienie i otłuszczenie tuszek. Mieszańce F1 (C x Zk) charakteryzowała dość mała masa ciała, typowa dla kurcząt wolno rosnących, oraz dobre umięśnienie, zwłaszcza piersi. Ponowne skrzyżowanie z kogutami typu mięsnego wpłynęło na istotną (P < 0,01) poprawę parametrów oceny poubojowej. Mieszańce F2 (C x (C x Zk)) uzyskały dużą masę ciała, typową dla kurcząt średniorosnących. W porównaniu do kurcząt Hubbard JA 957 mieszańce F2 miały małą masę ciała, taką samą wydajność rzeźną, lepsze umięśnienie piersi, gorsze nóg i mniejsze otłuszczenie. Duży udział mięśni piersiowych w tuszce oraz małe otłuszczenie wskazują na przydatność tych kurcząt w użytkowaniu mięsnym jako materiał średnio rosnący, przeznaczony do dłuższego, 9-tygodniowego chowu.

Słowa kluczowe

EN

assessment; slaughter value; broiler chicken; genotype; carcass trait; meat breed; chicken

• Wydawca: -
• Czasopismo: Annals of Warsaw University of Life Sciences - SGGW. Animal Science
• Rocznik: 2013
• Tom: 52
• Opis fizyczny: p.179-185,ref.

Twórcy

autor

Riedel J.

• Department of Animal Breeding and Production, Warsaw University of Life Science - SGGW, Ciszewskiego 8, 02-786 Warsaw, Poland

autor

Michalczuk M.

• Department of Animal Breeding and Production, Warsaw University of Life Science - SGGW, Ciszewskiego 8, 02-786 Warsaw, Poland

autor

Zdanowska-Sasiadek Z.

• Department of Animal Breeding and Production, Warsaw University of Life Science - SGGW, Ciszewskiego 8, 02-786 Warsaw, Poland

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