A genetic study on sexual dimorphism of bodyweight in sheep

被引:5
|
作者
Ghafouri-Kesbi, Farhad [1 ]
Mianji, Ghodratollah Rahimi [2 ]
Pirsaraei, Zarbakht Ansari [2 ]
Hafezian, Seyed Hasan [2 ]
Baneh, Hasan [1 ]
Soleimani, Bijan [1 ]
机构
[1] Islamic Azad Univ, Karaj Branch, Karaj, Iran
[2] Agr Sci & Nat Resources Univ Sari, Fac Anim & Fishery Sci, Dept Anim Sci, Sari, Iran
关键词
animal model; bodyweight; direct effects; maternal effects; VARIANCE-COMPONENTS; GROWTH-PERFORMANCE; SIZE DIMORPHISM; BODY-WEIGHT; TRAITS; WILD; HERITABILITIES; POPULATION; EVOLUTION; MODELS;
D O I
10.1071/AN13316
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
The aim of the present study was to investigate the genetic basis of sexual dimorphism of bodyweight in Zandi sheep. To do this, a pedigree including 1450 dams and 170 sires was used. Six bivariate animal models were applied for investigating direct and maternal effects for three age-specific bodyweights (bodyweight at birth, 3 and 6 months of age) in male and female Zandi lambs. The variance components were estimated via REML procedure. Males were, respectively, 6%, 7% and 9% heavier than females at birth, weaning and 6 months of age. Estimates of sexual dimorphism levels (expressed as M/F) were 1.11 at birth, 1.07 at weaning and 1.09 at 6 months of age, which indicated relatively low levels of sexual size dimorphism in the traits studied. Except for birthweight, for which estimates of additive genetic, residual and phenotypic variances as well as direct heritability and additive coefficient of variation were higher in females, for other traits studied, estimates were higher in males. However, regarding direct and maternal effects, none of the differences between the sexes was significant, indicating no need for sexual selection. Cross-sex genetic correlations were 0.862 at birth, 0.918 at weaning and 0.922 at 6 months of age, which highlighted birthweight as the most dimorphic trait. It was concluded that, owing to possible contribution of sexual chromosomes to variation of growth-related traits, bodyweight in male and female lambs may not be under the exactly same genetic control.
引用
收藏
页码:101 / 106
页数:6
相关论文
共 50 条
  • [1] Genetic aspects of sexual size dimorphism in a synthesized breed of sheep
    Ghafouri-Kesbi, Farhad
    Baneh, Hasan
    [J]. META GENE, 2018, 17 : 177 - 183
  • [2] THE GENETIC FOUNDATION OF SEXUAL DIMORPHISM
    POLANI, PE
    [J]. ANNALS OF HUMAN BIOLOGY, 1984, 11 (04) : 358 - 359
  • [3] The genetic basis of sexual dimorphism in birds
    Coyne, Jerry A.
    Kay, Emily H.
    Pruett-Jones, Stephen
    [J]. EVOLUTION, 2008, 62 (01) : 214 - 219
  • [4] Genetic linkage map of a wild genome: genomic structure, recombination and sexual dimorphism in bighorn sheep
    Jocelyn Poissant
    John T Hogg
    Corey S Davis
    Joshua M Miller
    Jillian F Maddox
    David W Coltman
    [J]. BMC Genomics, 11
  • [5] Genetic linkage map of a wild genome: genomic structure, recombination and sexual dimorphism in bighorn sheep
    Poissant, Jocelyn
    Hogg, John T.
    Davis, Corey S.
    Miller, Joshua M.
    Maddox, Jillian F.
    Coltman, David W.
    [J]. BMC GENOMICS, 2010, 11
  • [6] Genetic Architecture of Sexual Dimorphism in Humans
    Rigby, Nichole
    Kulathinal, Rob J.
    [J]. JOURNAL OF CELLULAR PHYSIOLOGY, 2015, 230 (10) : 2304 - 2310
  • [7] Sexual dimorphism in testosterone programming of cardiomyocyte development in sheep
    Ghnenis, Adel
    Padmanabhan, Vasantha
    Vyas, Arpita
    [J]. AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY, 2022, 322 (04): : H607 - H621
  • [8] Reduced Skull Sexual Dimorphism in a Local Sheep Breed
    Pares-Casanova, P. M.
    [J]. IRANIAN JOURNAL OF APPLIED ANIMAL SCIENCE, 2014, 4 (03): : 643 - 646
  • [9] Sexual Dimorphism of Cardiomyocyte Size in Adult but Not Fetal Sheep
    Jonker, Sonnet
    Louey, Samantha
    Giraud, George
    [J]. JOURNAL OF WOMENS HEALTH, 2011, 20 (10) : 1394 - 1394
  • [10] Sexual dimorphism, activity budget and synchrony in groups of sheep
    Michelena, P
    Noël, S
    Gautrais, J
    Gerard, JF
    Deneubourg, JL
    Bon, R
    [J]. OECOLOGIA, 2006, 148 (01) : 170 - 180