Environmental and Genetic Factors Affecting on Semen Quality in Iranian Holstein Bulls

Iranian Journal of Applied Animal Science

مقاله 3، دوره 4، شماره 1، خرداد 2014، صفحه 33-37   

نوع مقاله: Research/Original Article

نویسندگان

M.V. Ghasemi؛ A. Ghorbani^*

Department of Animal Science, Shabestar Branch, Islamic Azad University, Shabestar, Iran

چکیده

The objective of this study was to evaluate the importance of environmental and genetic factors affecting semen quality; sperm volume (SV), sperm concentration (SPCO), total sperm (TS), fresh sperm motility (FSM), total fresh motile sperm (TFMS), post thaw sperm motility (PTSM), total post thaw motile sperm (TPTMS), number of produced payout (NPP), number of fresh motile sperm in each milt ejaculation (NFMSE), motility before and after the freezing (MBATF) and number of post thaw motile sperm in each milt ejaculation (NPTMSE). We used polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) in 83 bulls belonging to two progeny test centers. The BB genotype was omitted from analysis.Season of collection had a significant effect on sperm volume (SV)(P<0.006), sperm concentration (SPCO)(P<0.0038), fresh sperm motility (FSM)(P<0.0001), post thaw sperm motility (PTSM)(P<0.001), total post thaw motile sperm (TPTMS)(P<0.0075), number of produced payout (NPP)(P<0.0247), number of fresh motile sperm in each milt ejaculation (NFMSE)(P<0.0012) and motility before and after the freezing (MBATF)(P<0.0001) but did not significantly affect TS (P<0.438), total post thaw motile sperm (TPTMS)(P<0.3606) and number of post thaw motile sperm in each milt ejaculation (NPTMSE)(P<0.1106). The interaction of seasons with follicle-stimulating hormone and semen quality traits only significantly affect sperm volume (SV)(P<0.0435), sperm concentration (SPCO)(P<0.008) and number of produced payout (NPP)(P<0.0119). Genetics and environmental factors clearly contribute to semen production in Holstein bulls.

کلیدواژه‌ها

Environmental factor؛ genetic؛ Iranian Holstein bulls؛ semen quality

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