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"Experientia docet" - Experience is the best teacher

Identifying sequence variation in cation channel sperm associated genes in Cape mountain zebra (Equus zebra zebra)

  • 2020
  • Issue: 6
  • Volume: 50
R.M. Smith, A. Kotzé, J.P. Grobler & D.L. Dalton Page: 807 - 813

The Cape mountain zebra (Equus zebra zebra) has recovered from near extinction over more than eight decades. While their numbers have increased, populations remain isolated with low genetic diversity. With more than 75 new populations being founded and more than…

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Increasing the productivity of Morkaraman sheep through crossbreeding with prolific Romanov sheep under semi-intensive production systems (Short communication)

  • 2019
  • Issue: 1
  • Volume: 49
D. Turkyilmaz & N. Esenbuga Page: 185 - 191

The aim of this study was to evaluate the effects of cross-breeding Turkish indigenous Morkaraman (M) ewes with prolific Romanov (R) rams on the reproduction and performance traits, growth traits, slaughter and carcass characteristics of the crossbred offspring under semi-intensive…

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Preliminary genome-wide association study for wet-dry phenotype in smallholder ovine populations in South Africa

  • 2017
  • Issue: 3
  • Volume: 47
A.H. Molotsi, J.F. Taylor, S.W.P. Cloete, F. Muchadeyi, J.E. Decker, L. Sandenbergh & K. Dzama Page: 327 - 331

The aim of this study was to identify single nucleotide polymorphisms (SNPs) associated with genomic region underlying variation in the binomial reproductive trait ‘wet-dry’ in sheep. The wet-dry phenotype was used to represent the reproductive status of the ewes, divided…

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Effect of polymorphism in the LIF gene on reproductive performance of hybrid Polish Large White and Polish Landrace sows. (Short communication)

  • 2014
  • Issue: 1
  • Volume: 44
D. Napierała, M. Kawęcka, E. Jacyno, B. Matysiak & A. Wierzchowska Page: 49 - 53

The aim of the study was to determine the potential relationships between variants of the leukaemia inhibitory factor (LIF) gene and litter size in Landrace x Polish White sows. To identify polymorphisms within the LIF gene, the polymerase chain reaction–restriction…

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Divergent selection for reproduction affects dag score, breech wrinkle score and crutching time in Merinos (Short communication)

  • 2012
  • Issue: 3
  • Volume: 42
A.J. Scholtz, S.W.P. Cloete, J.J.E. Cloete, A.C.M. Kruger, J.B. van Wyk & K. van der Linde Page: 274 - 279

Merino lines that were divergently selected from the same base population from 1986 to 2009 for their ability to rear multiples were assessed for dag score in autumn and spring, breech wrinkle score, and crutching time. Animals in the Low…

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Reproduction rate as a factor in meat production

  • 1984
  • Issue: 4
  • Volume: 14
A.W. Lishman, A.G. Paterson & S.M. Beghin Page: 164 - 168

The need to optimize rather than maximize rates of reproduction has been demonstrated for various production situations. In a highly intensive system, incorporating the use of artificial insemination, increasing the calving rate from 75 to 85% did not yield more…

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