Factors Affecting SSR in Holstein Dairy Cows

Document Type : Other

Authors

• Alireza Heravi Mosavi
• Abolghasem Golian
• Jalal Modaresi

Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

10.22067/ijasr.v8i1.22315

Abstract

Introduction Secondary sex ratio (SSR) is the proportion of males to females at birth. It has been shown in many different mammalian species, many factors are associated with SSR. Changes in secondary sex ratio in dairy cows is considered economically important and the ability to change it could affect the revenues and profitability of a dairy farm. Thus, sperm or embryo sexing techniques in recent years has attracted more attention. Most breed of dairy cattle are more likely to have female calf is born to use them as replacement heifers and in order to maintain their productive herd number. On the contrary, when the goal is the production of meat, bull calves due to higher growth rates and production efficiency, are more convenient and more economically efficient. The aim of present study was to investigate some key factors affecting SSR in Iranian Holstein cows.
According to Fisher, the sex ratio in the population under the control of natural selection is not always the same. There is overwhelming evidence to support the theory that shows Fisher Primary and secondary sex ratio sex ratio can deviate from this balance and natural selection caused a change in this ratio can be in certain circumstances. For example, the secondary sex ratio of 52:48 has been reported in dairy cows. Studies on mammalian species suggest that several factors, including latitude of the location, the dominant regional climate model, time and frequency of mating to ovulation, diet, age of parents, physical score, breed and produced eggs from ovarian left or right can have a significant effect on the secondary sex ratio. Weather conditions may modify the internal environment and the effect on physiological mechanisms or through the impact on the frequency and type of foods available to parents, the secondary sex ratio is impressive. The impact on the quantity and quality of parent's access to food sources in many species of mammals, the sex ratio has been fixed. Previous reports have shown that high environmental temperature and higher rates of evaporation from a week to a month before conception secondary sex ratio was increased.
Materials and method The demographic, production and reproduction data of six large dairy farms between years 1375 and 1389 were used. The rolling average of 305 d fat corrected milk yield was 8145 kg with a range of 7578 to 8670 Kg. Breeding Center of Iran and the herds covered by the registration and recording them on a regular basis carried out by experts dairy cooperatives. The flocks were in the area northeast of the country. Production data (date corrected milk production and the cumulative production by 60 and 305 days of lactation), reproductive data (such as calving year, calving season, type of birth, sex of calf, the latest information on AI, days open) , and details the possible removal of the flock or death were recorded. Data were collected from flocks before the analysis was re-verification. Used by sperm, sperm into four groups: Iranian, Canadian, American and other countries (including sperm taken from European countries) groups. The data were analyzed using multivariate logistic regression model.
Statistics 0/05 was used to ensure meaningful results.
Results and discussion Results showed that the ratio of males to females was 53 to 47. Origin of the sires (including Iranian, American, or Canadian) had no impact on secondary sex ratio. Type of calving (eutocia vs. non-eutocia calving including dystocia and still birth) had significant impact on SSR (P

Keywords

• Holstein dairy cow
• Secondary sex ratio (SSR)

20.1001.1.20083106.1395.8.1.2.1

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References

1- Astolfi, P., and s. Tentoni. 1995. Sources of variation of the cattle secondary sex ratio. Genet selEvol, 27;3-14.

2- Berger, P. J, N. C. Negus., and C. N. Rowsemitt. 1987. Effect of 6-methoxybenzoxazolinone on sex ratio and breeding performance in Microtusmontanus. Biology of Reproduction, 6:255–60.

3- Berry, D. P., and A. R. Cromie. 2007. Artificial insemination increases the probability of a male calf in dairy and beef cattle. Theriogenology, 67, 346–352.

4- Berry, D. P., P. Lonergan., S. T. Butler., A. R. Cromie., T. Fair., F. Mossa., and A. C. Evans. 2008. Negative influence of high maternal milk production before and after conception on offspring survival and milk production in dairy cattle. J. Dairy Sci, 91:329–337.

5- Berry, D. P., J. F. Kearney., and J. R. Roche. 2011. Evidence of genetic and maternal effects on secondary sex ratio in cattle. Theriogenology, 75:1039–1044.

6- Buchanan, G. D. 1974. Asymmetrical distribution of implantation sites in the rat uterus. Biological Reporoduction, 11:611–618.

7- Cameron, E. Z. 2004. Facultative adjustment of mammalian sex ratios in support of the Trivers-Willard hypothesis: evidence for a mechanism. Proc. Biol. Sci. 271:1723–1728.

8- Cameron, E. Z., P. R. Lemons., P. W. Bateman., and N. C. Bennett. 2008. Experimental alteration of litter sex ratios in a mammal. Proceeding Biological Science, 275:323–327.

9- Chandler, J. E., H. C. Steinhot-Chenevert., R. W. Adkinson., and E. B. Moser. 1998. Sex ratio variation between ejaculates within sire evaluated by polymerase chain reaction, calving, and farrowing records. Journal of Dairy Science, 81:1855–1867.

10- Foote, R. H. 1977. Sex ratios in dairy cattle under various conditions. Theriogenology, 8:349–356.

11- Fisher, R. A. 1930. The Genetical Theory of Natural Selection. Oxford University Press, Clarendon, Oxford.

12- Grech, V., P. Vassalos-Agios., and C. Savona-Ventura. 2000. Declining male births with increasing geographical latitude in Europe. J. Epidemiol. Community Health, 54:244–266.

13- Helle, S., T. Laaksonen., A. Adamsson., J. Paranko., and O. Huitus. 2008. Female field voles with high testosterone and glucose levels produce male-biased litters. Animal Behevior, 75:1031–9.

14- Hossein-zadeh, N. G. 2010. Evaluation of the effect of twin births on the perinatal calf mortality and productive performance of Holstein dairy cows. Archiv Tierzucht, 53; 3,256-265.

15- Hossein-Zadeh, N. G., A. Nejati-Javaremi., S. R. Miraei-Ashtiani., and H. Kohram. 2008. An observational analysis of twin births, calf stillbirth, calf sex ratio, and abortion in Iranian Holsteins. Journal of Dairy Science, 91:4198 –205.

16- Hossein-Zadeh, N. G. 2012. Factors affecting secondary sex ratio in Iranian Holsteins. Theriogenology, 77, 214–219.

17- Hylan, D., A. M. Giraldo., J. A. Carter., G. T. Gentry., K. R. Bondioli., and R. A. Godke. 2009. Sex ratio of bovine embryos and calves originating from the left and right ovaries. Biology of Reproduction, 81: 933–938.

18- Jacobsen, R., H. Møller., and A. Mouritsen. 1999, Natural variation in the human sex ratio. Human Reproduction, 14:3120 –25.

19- James, W. H. 1987. The human sex ratio. Part 1: a review of the literature. Human Biology, 59: 721-752.

20- Lobel, S. M., A. J. Pomponio., and G. L. Mutter. 1993. The sex ratio of normal and manipulated human sperm quantitated by the polymerase chain reaction. Fertility Steril, 59:387–392.

21- Lyster, W. R. 1972. The sex ratios of human and sheep births in areas of high mineralization. International Journal of Environmental Study, 2:309 –16.

22- Meier, S., Y. J. Williams., C. R. Burke., J. K. Kay., and J. R. Roche. 2010. Short communication: Feed restriction around insemination did not alter birth sex ratio in lactating dairy cows. Journal of Dairy Science, 93:5408–5412.

23- Navara, K. J., and R. J. Nelson. 2009. Review: Prenatal environmental influences on the production of sex-specific traits in mammals. Seminars in Cell & Developmental Biology, 20:313–319.

24- Pratt, N. C., U. W. Huck, and R. D. Lisk. 1987. Offspring sex ratio in hamsters is correlated with vaginal pH at certain times of mating. Behavior Neural Biology, 48:310–316.

25- Reimers, E., and D. Lenvik. 1997. Fetal sex ratio in relation to maternal mass and age in reindeer. Canadian Journal of Zool, 75:648–650.

26- Roche J. R., J. M. Lee., and D. P. Berry. 2006, Climatic factors and secondary sex ratio in dairy cows. Journal of Dairy Science, 98:3221–7.

27- Rosenfeld, C. S., and R. M. Roberts. 2004. Maternal diet and other factors affecting offspring sex ratio: A review. Biological Reproduction. 71:1063–1070.

28- Silva del Rio, N., S. Stewart., P. Rapnicki., Y. M. Chang., and P. M. Fricke. 2007. An observational analysis of twin births, calf sex ratio, and calf mortality in Holstein dairy cattle. Journal of Dairy Science, 90: 1255-64.

29- Skjervold, H., and J. W. James. 1979. Causes of variation in the sex ratio in dairy cattle. Z. Tierz. Zuchtungsbio, 95:293–305.

30- Toro, M. A., A. Fernandez., L. A. Garcia-Cortes., J. Rodrigañez., and L. Silio. 2006. Sex ratio variation in Iberian pigs Genetics, 173:911–7.

31- Trivers, R., and D. E. Willard. 1973. Natural selection of parental ability to vary the sex ratio of offspring. Science, 179; 90-91.

32- Yilmaz, I., E. Eyduran., and A. Kaygisiz. 2010. Determination of some environmental factors related to sex ratio of Brown Swiss calves. Journal of Animal Plant Science, 20:164 –9.

33- Xu, Z. Z., D. L. Johnson., and L. J. Burton. 2000. Factors affecting the sex ratio in dairy cattle in New Zealand. Proc. New Zealand Social Animal Production, 60:301– 02.

34- Wolff, J. O. 1988. Maternal investment and sex ratio adjustment in American bison calves. Behavior Ecology Sociobiol, 23:127–133.