title: Effects of dietary supplementation of selenium and iodine on growth performance, carcass characteristics and histology of thyroid gland in goats.
abstract: This study assessed the effects of dietary selenium (Se), iodine (I) and a combination of both on growth performance, thyroid gland activity, carcass characteristics and the concentration of iodine and selenium in Longissimus lumborum (LL) muscle in goats. Twenty-four bucks were randomly assigned to four dietary treatments: control (CON), basal diet without supplementation, basal diet + 0.6 mg Se/kg dry matter (DM) (SS), 0.6 mg I/kg DM (IP), or combination of 0.6 mg/kg DM Se and 0.6 mg/kg DM I (SSIP) and fed for 100 days. Animals fed diet SSIP exhibited higher (P < 0.05) body weight and better feed conversion ratio (FCR) than those fed other diets. Dressing percentage of goats fed the supplemented diets was higher (P < 0.05) than that of the control. Carcasses from the IP group had higher (P < 0.05) total fat proportion than the SSIP group. The levels of both elements were significantly elevated (P < 0.05) in LL muscle in supplemented goats. Thyroid follicular epithelial cells of IP and SSIP animals were significantly higher than those of CON and SS groups. The study demonstrated that the combined Se and I dietary supplementation improves growth performance, carcass dressing percentage and increases the retention of Se and I in goat meat.
authors.affiliation: Halal Products Research Institute, Serdang, Selangor Darul Ehsan, Malaysia.|Department of Animal Science, College of Agriculture, University of Mosul, Mosul, Iraq.
authors.forename: Zeiad Amjad
authors.initials: ZA
authors.lastname: Aghwan
authors.affiliation: Halal Products Research Institute, Serdang, Selangor Darul Ehsan, Malaysia.|Department of Animal Science, Faculty of Agriculture, Serdang, Selangor Darul Ehsan, Malaysia.|Laboratory of Animal Production, Institute of Tropical Agriculture, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Malaysia.
authors.forename: Awis Qurni
authors.initials: AQ
authors.lastname: Sazili
authors.affiliation: Branch of Anatomy and Histology, College of Veterinary Medicine, University of Baghdad, Baghdad, Iraq.
authors.forename: Khalid Kamil
authors.initials: KK
authors.lastname: Kadhim
authors.affiliation: Department of Animal Science, Faculty of Agriculture, Serdang, Selangor Darul Ehsan, Malaysia.
authors.forename: Abdul Razak
authors.initials: AR
authors.lastname: Alimon
authors.affiliation: Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine.|Laboratory of Animal Production, Institute of Tropical Agriculture, Universiti Putra Malaysia, UPM Serdang, Selangor Darul Ehsan, Malaysia.
authors.forename: Yong Meng
authors.initials: YM
authors.lastname: Goh
authors.affiliation: Department of Animal Science, Faculty of Agriculture, Serdang, Selangor Darul Ehsan, Malaysia.|Department of Animal Production, University of Ilorin, Ilorin, Nigeria.
authors.forename: Kazeem Dauda
authors.initials: KD
authors.lastname: Adeyemi
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena / Q000502:physiology*; D000818:Animals; D004032:Diet / Q000662:veterinary*; D019587:Dietary Supplements; D006041:Goats / Q000254:growth & development* / Q000378:metabolism*; D007455:Iodine / Q000008:administration & dosage* / Q000032:analysis / Q000378:metabolism; D008297:Male; D008460:Meat / Q000032:analysis; D064170:Paraspinal Muscles / Q000378:metabolism; D012643:Selenium / Q000008:administration & dosage* / Q000032:analysis / Q000378:metabolism; D013961:Thyroid Gland / Q000033:anatomy & histology / Q000378:metabolism*; D013997:Time Factors
chemical_list: D007455:Iodine; D012643:Selenium
keywords: goat meat; growth; iodine; selenium; thyroid gland