Ovulation rate and prolificacy in Booroola x Olkuska crossbred ewes

• Autorzy: Klewiec J , Martyniuk E. , Gabryszuk M. , Baranowski A.
• Języki publikacji: EN

Abstrakty

EN

The study presents a comparison of ovulation rate (CL number) and litter size between pure Booroola (BB) and their reciprocal crosses (F1 and F2) with Olkuska sheep. As these breeds express a high reproduction potential and in the same time differ significantly in other performance traits affecting lamb production, it was assumed that their crosses might combine beneficial characteristics of both. When the total numbers of CL were analysed the ovulation rate in BB appeared by 0.6 higher (P≤0.002) than in crossbred ewes (F1 and F2 pooled). However, no such difference was ascertained when analysing the maximum CL numbers. Ovulation rate and litter size did not differ between F1 and F2 crossbred ewes.

PL

Mieszańce F1 owcy booroola (BB) z owcą olkuską (O) – BO – uzyskano z obukierunkowego krzyżowania 30 maciorek BB z dwoma trykami O i 12 maciorek O z sześcioma trykami BB. Pokolenie F2 pochodziło z kojarzenia F1 × F2. Analizowano poziom owulacji i plenność 46 maciorek BB i 73 maciorek BO, uwzględniając 22 maciorki F1 i 40 maciorek F2. Łączna liczba ciałek żółtych maciorek BB była wyższa o 0,6 (P≤0,002) niż stwierdzona u mieszańców F1 i F2. Natomiast nie udowodniono różnicy w maksymalnej liczbie ciałek żółtych. Plenność maciorek BB i BO była na jednakowym poziomie. Nie stwierdzono różnic w poziomie owulacji i plenności między maciorkami F1 a F2.

Słowa kluczowe

EN

Booroola sheep; animal genetics; sheep; prolificacy; ovulation rate; crossing; animal breeding; litter size; Olkuska sheep

• Wydawca: -
• Czasopismo: Animal Science Papers and Reports
• Rocznik: 2004
• Tom: 22
• Numer: 3
• Opis fizyczny: p.325-333,fig.,ref.

Twórcy

autor

Klewiec J

• Polish Academy of Sciences, Jastrzebiec, 05-552 Wolka Kosowska, Poland

autor

Martyniuk E.

autor

Gabryszuk M.

autor

Baranowski A.

Bibliografia

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