title: Assessment of heat tolerance and production performance of Aardi, Damascus, and their crossbred goats.
abstract: The question of whether the adaptability and production performance in goats may be enhanced using a crossbreeding program between bucks of a native and heat-tolerant breed and does of an exotic and dual-purpose breed was approached and examined herein by comparing purebred Aardi and Damascus goats and their crossbred lines (i.e., (1)/2 Aardi (1)/2 Damascus (½A½D) and (1)/4 Aardi (3)/4 Damascus (¼A¾D)) reared in a region characterized by dry and hot bioclimatic conditions. Twenty-four male 6-month-old kids randomly segregated into four groups (six replicates/group) were used for the experiment. Climatic, thermo-physiological, biophysiological, metabolic, blood hematological, and biochemical measurements were all determined. The obtained results indicated that such a program was proven to be successful. This conclusion was demonstrated by the findings that crossbred goats (i.e., (1)/2A(1)/2D and (1)/4A(3)/4D) under such bioclimatic conditions were able to show (P < 0.05) higher heat tolerance capabilities compared to purebred Damascus goats as well as manifested (P < 0.05) higher production performance compared to the purebred Aardi goats. Accordingly, these evidences could emphasize that the crossbreeding may enable these animals to display a simultaneous improvement of both traits by the possible benefits that could arise from heterosis and breed complementarity. Researches dealing with this aspect may very well improve our understanding of goat's production and welfare under harsh environmental conditions. Future studies should include an economic analysis of traits that have the potential to impact the overall profitability to a vertically coordinated system.
authors.affiliation: Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia. dremas@ksu.edu.sa.
authors.forename: Emad Mohammed
authors.initials: EM
authors.lastname: Samara
authors.affiliation: Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Khalid Ahmed
authors.initials: KA
authors.lastname: Abdoun
authors.affiliation: Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Aly Bassunny
authors.initials: AB
authors.lastname: Okab
authors.affiliation: Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Mohammed Abdo
authors.initials: MA
authors.lastname: Al-Badwi
authors.affiliation: Department of Animal Production and Breeding, Faculty of Agriculture and Veterinary Medicine, Al-Qassim University, Al-Qassim, Saudi Arabia.|Animal Production Department, Faculty of Agriculture, Suez Canal University, Ismailia, Egypt.
authors.forename: Mohamed Fawzy
authors.initials: MF
authors.lastname: El-Zarei
authors.affiliation: Department of Animal Production and Breeding, Faculty of Agriculture and Veterinary Medicine, Al-Qassim University, Al-Qassim, Saudi Arabia.
authors.forename: Ali Mohamed
authors.initials: AM
authors.lastname: Al-Seaf
authors.affiliation: Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Ahmed Abrahim
authors.initials: AA
authors.lastname: Al-Haidary
mesh_terms: D000818:Animals; D001831:Body Temperature; D005838:Genotype; D006041:Goats / Q000235:genetics / Q000254:growth & development / Q000502:physiology; D006813:Humidity; D006824:Hybridization, Genetic; D008297:Male; D056152:Respiratory Rate; D013696:Temperature; D000071436:Thermotolerance
keywords: Adaptability; Bioclimatology; Crossbreeding; Goats; Heat tolerance; Heterosis; Thermoregulation
references.citation: Int J Biometeorol. 2015 Nov;59(11):1647-53
references.pmid: 25702060
references.citation: Int J Biometeorol. 2010 Nov;54(6):629-35
references.pmid: 19404683
references.citation: Animal. 2012 May;6(5):707-28
references.pmid: 22558920
references.citation: Int J Biometeorol. 2011 Sep;55(5):741-8
references.pmid: 21128086
references.citation: Int J Biometeorol. 2008 May;52(5):409-15
references.pmid: 18158609
references.citation: Int J Biometeorol. 2015 Feb;59(2):231-6
references.pmid: 24859822
references.citation: Int J Biometeorol. 2006 May;50(5):253-7
references.pmid: 16570153
references.citation: Am J Physiol. 1970 Oct;219(4):1136-9
references.pmid: 5459479
references.citation: Int J Biometeorol. 1991 Sep;35(2):88-91
references.pmid: 1743775
references.citation: Int J Biometeorol. 1987 Mar;31(1):77-84
references.pmid: 3583447