تحلیل فنوتیپی و ژنتیکی امتیاز سلول‌های بدنی شیر در گاوهای هلشتاین ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان

2 استادیار دانشکدۀ کشاورزی، دانشگاه پیام نور

3 استادیار، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان

چکیده

پژوهش حاضر به‌منظور برآورد اجزای واریانس، روند ژنتیکی و فنوتیپی امتیاز سلول‌های بدنی (SCS) با استفاده از داده‌های جمع‌آوری‌شده توسط مرکز اصلاح دام و بهبود تولیدات دامی کشور اجرا شد. در این مطالعه، از 850729 رکورد روز آزمون شمار سلول‌های بدنی (SCC) در دوره‌های شیردهی1 تا 4 مربوط به 32955 گاو ماده استفاده شد که در 472 گله طی سال‌های 1383 تا 1392 جمع‌آوری ‌شده بود. پارامترهای ژنتیکی با استفاده از مدل دام روزآزمون تکرارپذیر و نرم‌افزار ASReml برآورد شد. وراثت‌پذیری SCS، 176/0 و تکرارپذیری داخل و بین دوره‌های شیردهی به ترتیب203/0 و 362/0 برآورد شد. روند ژنتیکی و فنوتیپی با استفاده از تابعیت میانگین ارزش اصلاحی و فنوتیپی بر سال زایش به ترتیب 0246/0- و 047/0- محاسبه شد. این روند منفی و معنادار (P < 0.01) را می‌توان تا حدودی به بهبود ژنتیکی و برنامه‌های مدیریتی کنترل ورم پستان در سطح گاوداری‌های کشور نسبت داد.

کلیدواژه‌ها


عنوان مقاله [English]

Genetic and phenotypic analysis for somatic cell score in Iranian Holstein dairy cattle

نویسندگان [English]

  • Parisa Ghasemi Khani 1
  • Heydar Ghiasi 2
  • Ali Sadeghi-Sefidmazgi 3
1 . Former Graduate Student, Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
2 Assistant Professor, Department of Animal Science, Faculty of Agricultural Science, Payame Noor University, Tehran, Iran
3 Assistant Professor, Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
چکیده [English]

The objective of this study was to estimate variance components, genetic and phenotypic trends for somatic cell score. Dataset that collected by the Animal Breeding Center of Iran was used in this study. Data file included 850,729 test day records of somatic cell counts (SCC)  on 32,955 cows from lactations one to four, in 472 herds, gathered from years 2002 to 2013 in Iran. A test day repeatability animal model was used to estimate the genetic parameters and variance components using ASReml. The heritability was estimated 0.176. Estimated repeatability (± SE) for within (rwit) and between (racr) parities were 0.362 ± 0.006 and 0.230 ± 0.002, respectively. The genetic and phenotypic trend based on regression of average breeding values of SCS on year of birth, was -0.0246 and -0.047, respectively. This trend could be due to genetic improvement and mastitis management control programs that are widely being used across the dairy farms in country.

کلیدواژه‌ها [English]

  • genetic parameters
  • milk quality
  • Test day record
  • Mastitis
  • somatic cell
  1. Ali, A. K. A. & Shook, G. E. (1980). An optimum transformation for somatic cell concentration in milk. Journal of Dairy Science, 63(3), 487-490.
  2. Boichard, D. & Rupp, R. (1997). Genetic analysis and genetic evaluation for somatic cell score in French dairy cattle. In: Proceedings of the international workshop on genetic improvement of functional traits in cattle; health, Uppsala, Sweden, June, Interbull Bull pp. 54.
  3. Carnier, P., Albera, A., Dal Zotto, R., Groen, A. F., Bona, M., & Bittante, G. (2000). Genetic parameters for direct and maternal calving ability over parities in Piedmontese cattle. Journal of Animal Science,78, 2532-2539.
  4. Da, Y., Grossman, M., Misztal, I. & Wiggans, G. R. (1992). Estimation of genetic parameters for somatic cell score in Holsteins. Journal of dairy science, 75(8), 2265-2271.
  5. Dadpasand, D., Zamiri, M. J.,  & Atashi, H. (2013). Genetic relationship of average somatic cell score at different stages of lactation with milk yield and composition in Holstein cows. Iranian J. Veterinary Research, 14 (3), 190-196.
  6. Dadpasand, M., Zamiri, M. J., Atashi, H. & Akhlaghi A. 2012.  Genetic relationship of conformation traits with average somatic cell score at 150 and 305 days in milk in Holstein cows of Iran. Journal of Dairy Science, 95: 7340–7345.
  7. Faraji-Arugh, H., Aslami-Nejhad, A. A. & Rokuyi, M. (2012). The geneitic and phenotypic trend and environmental factor affecting somatic cell score in cattle Iraian Holstein. Iranian Journal of Animal Sceince Reasearch, 3(4), 459-454. (In Farsi).
  8. Fitzpatrick, J. L., Logan, K. E., Young, F. J., Stear, M. J., Platt, D. J., & McGuirk, B. J. (1999). Breeding cattle for mastitis resistance. In: Proceedingsof the British Mastitis Conference, Compton, UK, pp. 46.
  9. Forabosco, F. (2005). Breeding for longevity in Italian Chianina cattle. Ph. D. dissertation, University of Wageningen, Netherland.
  10. Gilmour, A. R., Gogel, B. J., Cullis, B. R., Welham, S. J. & Thompson, R. (2002). AsReml User Guide Release 1.0. Hemel Hempstead. UK: VSN International Ltd.
  11. Gonzalo, C., Carriedo, J. A., Blanco, M. A., Beneitez, E., Juárez, M. T., De La Fuente, L. F. & Primitivo, F. S. (2005). Factors of variation influencing bulk tank somatic cell count in dairy sheep. Journal of dairy science, 88(3), 969-974.
  12. Heringstad, B., Chang, Y. M., Gianola, D. & Klemetsdal, G. (2003). Genetic analysis of longitudinal trajectory of clinical mastitis in first-lactation Norwegian cattle. Journal of Dairy Science, 86(8), 2676-2683.
  13. Juga, J., Mäntysaari, E. A. & Pösö, J. (1999). Economic response to total merit selection in Finnish Ayrshire breeding. Interbull Bulletin, (23), 79.
  14. Kearney, F. (2007). Improving dairy herd fertility through genetic selection. Irish Veterinary Journal, 60(6), 377-380.
  15. Kennedy, B. W., Sethar, M. S., Tong, A. K. W., Moxley, J. E. & Downey, B. R. (1982). Environmental factors influencing test-day somatic cell counts in Holsteins. Journal of Dairy Science, 65(2), 275-280.
  16. Kheirabadi Kh., S. Alijani. 2013.  Effect of somatic cell counts on the production traits and estimation of genetic parameters for milk yield traits of Holstein cows. Animal Production Research, 2(1): 65- 76.
  17. Kühn, C., Bennewitz, J., Reinsch, N., Xu, N., Thomsen, H., Looft, C., Brockmann, G.A., Schwerin, M., Weimann, C., Hiendleder, S., Erhardt, G., Medjugorac, I., Förster, M., Brenig, B., Reinhardt, F., Reents, R., Russ, I., Averdunk, G., Blümel, J., Kalm, E. & Kalm, E. (2003). Quantitative trait loci mapping of functional traits in the German Holstein cattle population. Journal of Dairy Science, 86(1), 360-368.
  18. Lund, T., Miglior, F., Dekkers, J. C. M. & Burnside, E. B. (1994). Genetic relationships between clinical mastitis, somatic cell count, and udder conformation in Danish Holsteins. Livestock Production Science, 39(3), 243-251.
  19. Martins, A. M., Silvestre, A. M., Petim-Batista, M. F. & Colaço, J. A. (2011). Somatic cell score genetic parameter estimates of dairy cattle in Portugal using fractional polynomials. Journal of Animal Science, 89(5), 1281-1285.
  20. Monardes, H. G. & Hayes, J. F. (1985). Genetic and phenotypic statistics of lactation cell counts in different lactations of Holstein cows. Journal of dairy science, 68(6), 1449-1455.
  21. Morek-Kopeć, M., Żarnecki, A. & Jagusiak, W. (2009). Associations between somatic cell score of milk and fertility traits in Polish Holstein-Friesian cows. Anim. Sci. Pap. Rep, 27, 15-22.
  22. Mrode, R. A. & Swanson, G. J. T. (2003). Estimation of genetic parameters for somatic cell count in the first three lactations using random regression. Livestock Production Science, 79(2), 239-247.
  23. Neuenschwander, T., Kadarmideen, H. N., Wegmann, S. & De Haas, Y. (2005). Genetics of parity-dependant production increase and its relationship with health, fertility, longevity, and conformation in Swiss Holsteins. Journal of dairy science, 88(4), 1540-1551.
  24. Ødegård, J., Klemetsdal, G. & Heringstad, B. (2003). Variance components and genetic trend for somatic cell count in Norwegian Cattle. Livestock production science, 79(2), 135-144.
  25. Pagnacco, G., Miglior, F., Zhang, W. C., Dekkers, J. C. M. & Burnside, E. B. (1994).Genetic evaluation for somatic cell count and relationship with inbreeding in Canadian Holstein. In:Proceedings of the   World Congress on Genetics Applied to Livestock Production, 7-12 Agu,Guelph, Canada, pp.93.
  26. Pryce, J. E., Esslemont, R. J., Thompson, R., Veerkamp, R. F., Kossaibati, M. A. & Simm, G. (1998). Estimation of genetic parameters using health, fertility and production data from a management recording system for dairy cattle. Animal Science, 66(03), 577-584.
  27. Ptak, E., Brzozowski, P., Jagusiak, W. & Zdziarski, K. (2007). Genetic parameters for somatic cell score for Polish Black-and-White cattle estimated with a random regression model. Journal of Animal and Feed Sciences, 16(3), 357.
  28. Rendel, J. M. & Robertson, A. (1950). Estimation of genetic gain in milk yield by selection in a closed herd of dairy cattle. Journal of Genetics, 50(1), 1-8.
  29. Riggio, V., Portolano, B., Bovenhuis, H. & Bishop, S. C. (2010). Genetic parameters for somatic cell score according to udder infection status in Valle del Belice dairy sheep and impact of imperfect diagnosis of infection. Genetics Selection Evolution, 42(1), 30.
  30. Sadeghi-Sefidmazgi, A., Moradi-Shahrbabak, M., Nejati-Javaremi, A., Miraei-Ashtiani, S. R. & Amer, P. R. (2011). Estimation of economic values and financial losses associated with clinical mastitis and somatic cell score in Holstein dairy cattle. Animal, 5(01), 33-42.
  31.  Sadeghi-Sefidmazgi A., F. Rayatdoost-Baghal, 2014. Effects of herd management practices on somatic cell counts in an arid climate. Revista Brasileira de Zootecnia. 43(9):499-504.
  32. Safdari Shahroodi M., Pakdel A., Miraei Ashtiani S.R. 2010. Estimation of genetic parameters, proposal of an udder health index and on comparisons of different selection strategies to include this trait in Iranian Holstein cows’ breeding programs. Iranian Journal of Animal Science, 41(4): 381-390.
  33. Urioste, J. I., Franzén, J., Windig, J. J. & Strandberg, E. (2012). Genetic relationships among mastitis and alternative somatic cell count traits in the first 3 lactations of Swedish Holsteins. Journal of dairy science, 95(6), 3428-3434.
  34. Weller, J. I. & Ezra, E. (2004). Genetic analysis of the Israeli Holstein dairy cattle population for production and nonproduction traits with a multitrait animal model. Journal of dairy science, 87(5), 1519-1527.
  35. Zavadilova, I., Wolf, J., Stípková, M., Nemcova, E. & Jamrozik, J. (2011). Genetic parameters for somatic cell score in the first free lactations of Czech Holstein and Fleckvieh breeds using a random regression model. Czech J. Anim. Sci, 56(6), 251-260.
  36. Zhang, W. C., Dekkers, J. C. M., Banos, G. & Burnside, E. B. (1994). Adjustment factors and genetic evaluation for somatic cell score and relationships with other traits of Canadian Holsteins. Journal of dairy science, 77(2), 659-665.

20.    Meyer, K. (2003). SECATEURS: A program to `prune' your pedigrees. university of new england, from http://didgeridoo.une.edu.au/km/prune.php.