Effects of genetic and environmental factors on pre-weaning and post-weaning growth in West African crossbred sheep

K. Benyi, D. Norris, N. Karbo, K. A. Kgomo

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Effects of genetic and environmental factors on pre-weaning and post-weaning growth were studied in West African crossbred sheep. Effects of lamb genotype (7/8 Sahelian-1/8 Djallonké, 3/4 Sahelian-1/4 Djallonké and 1/2 Sahelian-1/2 Djallonké; hereafter denoted 7/8Sa, 3/4Sa and 1/2Sa, respectively), parity, type of birth, sex of lamb and year-season of lambing on birth weight, weaning weight, 8-month weight and pre- and post-weaning growth rates were determined. At birth 7/8Sa and 3/4Sa lambs were heavier (p < 0.01) than 1/2Sa lambs. Lambs born to first-parity ewes were lighter (p < 0.01) at birth than lambs of older ewes. At weaning and 8 months of age, lambs born to fourth-parity ewes were heavier (p < 0.05) than those born to ewes of the other parities. Parity did not have any significant effects on pre-weaning growth rate. Lambs born in the rainy season of 2001 were significantly heavier at birth and at 8 months of age than those born in the dry season of 2001/02, but there was no difference between the two groups at weaning. Pre-weaning growth rate was significantly faster in lambs born in the dry season of 2001/02 but the reverse was true for post-weaning growth rate.

Original languageEnglish
Pages (from-to)547-554
Number of pages8
JournalTropical Animal Health and Production
Volume38
Issue number7-8
DOIs
Publication statusPublished - Oct 1 2006

Fingerprint

Weaning
Sheep
crossbreds
weaning
lambs
sheep
environmental factors
parity (reproduction)
Growth
Parity
ewes
Parturition
dry season
Weights and Measures
lambing
weaning weight
birth weight
Birth Weight
wet season
Genotype

All Science Journal Classification (ASJC) codes

  • Food Animals
  • Animal Science and Zoology

Cite this

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abstract = "Effects of genetic and environmental factors on pre-weaning and post-weaning growth were studied in West African crossbred sheep. Effects of lamb genotype (7/8 Sahelian-1/8 Djallonk{\'e}, 3/4 Sahelian-1/4 Djallonk{\'e} and 1/2 Sahelian-1/2 Djallonk{\'e}; hereafter denoted 7/8Sa, 3/4Sa and 1/2Sa, respectively), parity, type of birth, sex of lamb and year-season of lambing on birth weight, weaning weight, 8-month weight and pre- and post-weaning growth rates were determined. At birth 7/8Sa and 3/4Sa lambs were heavier (p < 0.01) than 1/2Sa lambs. Lambs born to first-parity ewes were lighter (p < 0.01) at birth than lambs of older ewes. At weaning and 8 months of age, lambs born to fourth-parity ewes were heavier (p < 0.05) than those born to ewes of the other parities. Parity did not have any significant effects on pre-weaning growth rate. Lambs born in the rainy season of 2001 were significantly heavier at birth and at 8 months of age than those born in the dry season of 2001/02, but there was no difference between the two groups at weaning. Pre-weaning growth rate was significantly faster in lambs born in the dry season of 2001/02 but the reverse was true for post-weaning growth rate.",
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Effects of genetic and environmental factors on pre-weaning and post-weaning growth in West African crossbred sheep. / Benyi, K.; Norris, D.; Karbo, N.; Kgomo, K. A.

In: Tropical Animal Health and Production, Vol. 38, No. 7-8, 01.10.2006, p. 547-554.

Research output: Contribution to journalArticle

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