Evaluation of a local goat population for fertility traits aiming at the improvement of its economic sustainability through genetic selection

  • Ahlem Atoui Institute of Arid Regions, Faculty of Sciences (F.S.G), University of Gabés, Médenine 4119
  • María J. Carabaño INIA, Dept. de Mejora Genética Animal, Ctra. de La Coruña Km 7.5, 28040 Madrid
  • Sghaier Najari Institute of Arid Regions, Faculty of Sciences (F.S.G), University of Gabés, Médenine 4119
Keywords: llocal goats, kidding interval, litter size at birth, genetic parameters


The study aims to determine the environmental and genetic components for the reproductive performance of a Tunisian local goat population to set up the basis for the future improvement of this important component of efficient production. The reproductive traits considered were kidding interval (KI) and litter size at birth (LSB). Records of 462 kiddings belonging to 185 dams and 11 sires were collected over a period of 22 years in the caprine herd of the Arid Areas Institute of Médenine. Significance of environmental effects was tested with ANOVA techniques. Genetic parameters were estimated using restricted maximum likelihood fitting an animal mixed model. Mean KI and LSB were 13.85 ± 5.20 months and 1.33 ± 0.49 kids, respectively. The effect of parity number and the interaction between year and month of kidding were significant for LSB and KI. Trait LSB increased with parity number up to the fifth parity while KI decreased with parity number indicating that young females show compromised reproductive performance probably because of growth requirements and scarcity of food resources. A detrimental effect for kiddings occurring during winter (matings in summer) was observed from estimates of the year by month of kidding effect. Heritability estimates for KI and LSB were 0.13 and 0.08, respectively. A moderate repeatability estimate of 0.31 was obtained for LSB while 0.17 was obtained for KI. The low estimates of heritability obtained for reproductive traits indicated that accurate selection based on the doe’s own performance will require large amounts of data. However, the estimated genetic variability was substantial, providing the grounds for the genetic improvement of the reproductive parameters in this population.


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Author Biography

María J. Carabaño, INIA, Dept. de Mejora Genética Animal, Ctra. de La Coruña Km 7.5, 28040 Madrid


Alexandre G, Matheron G, Chemineau P, Fleury JA, 2001. Reproductive performances of Creole goats in Guadeloupean. Livest Res Rural Dev 133: 1-4.

Amble VN, Khandekar M, Garg JN, 1964. Statistical studies on breeding data of Beetal goats. Ind Agr Res 64: 712-724.

Amoah EA, Gelaye S, Guthrie P, Rexroad CE, 1996. Breeding season and aspects of reproduction of female goats. J Anim Sci 74: 723-728. https://doi.org/10.2527/1996.744723x

Bradford GE, 1985. Selection for litter size. In: Genetics of reproduction in sheep; Land RB & Robinson DW (Eds.), pp: 3-18. Butterworths, London. https://doi.org/10.1016/B978-0-407-00302-6.50004-0

Chemineau P, Daveau A, Cognié Y, Aumont G, Chesneau D, 2004. Seasonal ovulatory activity exists in tropical Creole female goats and Black Belly ewes subjected a temperate photoperiod. BMC Physiol 4: 12. https://doi.org/10.1186/1472-6793-4-12

Chukwuka OK, Okoli IC, Okeudo NJ, Opara MN, Herbert U, Ekenymen BU, 2010. Reproductive potentials of West African Dwarf sheep and goat: A review. Res J Vet Sci 3: 86-100. https://doi.org/10.3923/rjvs.2010.86.100

Devendra C, 1984. Prolific breeds of goat. In: Genetics of reproduction in sheep; Land RB & Robinson DW (Eds.), pp: 65-69. Butterworths, London.

Greyling J, 2000.Reproduction traits in the Boer goat doe. Small Rumin Res 36: 171-177. https://doi.org/10.1016/S0921-4488(99)00161-3

Güney O, Torun O, Ozuyanik O, Darcan N, 2006. Milk production, reproductive and growth performances of Damascus goats under northern Cyprus conditions. Small Rumin Res 65: 176-179. https://doi.org/10.1016/j.smallrumres.2005.07.026

Hamed A, Mabrouk M, Shaat I, Bata S, 2009. Estimation of genetic parameters and some non genetic factors for litter size at birth and weaning and milk yield traits in Zaraibi goats. Egypt J Sci 4: 55-64.

Hossain S, Sultana N, Alam MR, Rashid M, 2004.Reproductive performance of Black Bengal goat under semi-intensive management. J Biol Sci 4: 537-541. https://doi.org/10.3923/jbs.2004.537.541

Land RB, 1978. Reproduction in young sheep: some genetic and environmental sources of variation. J Reprod Fert 52: 427-436. https://doi.org/10.1530/jrf.0.0520427

Mellado M, Meza-Herrera CA, 2002. Influence of season and environment on fertility of goats in a hot-arid environment. J Agric Sci 138: 97-102. https://doi.org/10.1017/S0021859601001630

Mellado M, Valdez R, García JE, López R& Rodríguez A, 2006. Factors affecting the reproductive performance of goats under intensive conditions in a hot arid environment. Small Rumin Res 63: 110-118. https://doi.org/10.1016/j.smallrumres.2005.02.016

Misztal I, Tsuruta S, Strabel T, Auvray B, Druet T, Lee DH, 2002. BLUPF90 and related programs (BGF90). Proc. 7th World Congr in Genetics Applied to Livestock Production, August 19-23, Montpellier, France. Commun. No. 28-07.

Nahardeka N, Das D, Goswami RN, Roy TC, Gogoi PK, 1995.Reproductive performance of Assam local goats and their crossbreds with Beetal. Ind J Small Rumin 1: 8-14.

Najari S, 2005. Caractérisation zootechnique et génétique d'une population caprine. Cas de la population caprine locale des régions arides tunisiennes. Thèse de doctorat d'Etat. Institut National Agronomique, Tunisie, p 214.

Najari S, Gaddour A, Ouni M, 2007. Indigenous kids weight variation with respect to non genetic factors under pastoral mode in Tunisian arid region. J Anim Vet Adv 6: 441-450.

Odubote IK, 1996. Genetic parameters for litter size at birth and kidding interval in the West African Dwarf goats. Small Rumin Res 20: 261-265. https://doi.org/10.1016/0921-4488(95)00786-5

Odubote IK, Akinokun JO, Ademosun AA, 1992. Production characteristics of West African Dwarf goats under improved management system. In: Systems goat production; Ayeni AO & Bosman HG (Eds). Proc. Int. Workshop (IW´92), Ile-Ife, Nigeria, pp: 202-207.

Ouni M, Najari S, Gaddour A, Andrea C, Ishwar AK, Singh SK, 2007. Early growth of morphometric traits of local goat population in Tunisian arid zone. J Biol Sci 7: 1194-1200. https://doi.org/10.3923/jbs.2007.1194.1200

Roy N, Ishwar AK, Singh SK, 2007. Reproductive performance of Black Bengal goats. Small Rumin Res13: 84-85.

Safari E, Fogarty NM, Gilmour AR, 2007. A review of genetic parameter estimates for wool, growth, meat and reproduction traits in sheep. Livest Prod Sci 92: 271-289. https://doi.org/10.1016/j.livprodsci.2004.09.003

Singh S, Rana ZS, Dalal DS, 2002.Genetic and non-genetic factors affecting reproductive performance of Beetal, Black Bengal and their reciprocal crosses. Ind J Anim Res 36: 64-66.

Song HB, 2003. Reproduction traits in the Korean native goat doe. Kor J Anim Reprod 27: 289-297.

Song H, Sol HS, 2006. Reproductive performance of Korean native goats under natural and intensive conditions. Small Rumin Res 65: 284-287. https://doi.org/10.1016/j.smallrumres.2005.08.001

How to Cite
Atoui, A., Carabaño, M. J., & Najari, S. (2018). Evaluation of a local goat population for fertility traits aiming at the improvement of its economic sustainability through genetic selection. Spanish Journal of Agricultural Research, 16(2), e0404. https://doi.org/10.5424/sjar/2018162-12604
Animal breeding, genetics and reproduction