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مقالات فارسیISIکنفرانسهاژورنالها

Heritability of semen quality traits of crossbred Isa Brown and Nigerian indigenous cocks

محل انتشار: مجله جهانی تحقیقات علوم دامی، دوره: 9، شماره: 2
سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 59

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https://civilica.com/doc/1906719

شناسه ملی سند علمی:

JR_GJSAR-9-2_005

تاریخ نمایه سازی: 23 بهمن 1402

چکیده مقاله:

Main and reciprocal crossbred cocks from a population of ۵۳۱ day-old chicks were used to study heritability of semen volume (SV), sperm motility (SM), sperm concentration (SC) and live sperm (SP) at ۳۶ and ۴۰ weeks of age. Analysis of variance was performed for unbalanced nested design. The analysis yielded variance components of sire ( ), dam ( ) and sire plus dam ( ), and heritability (h۲) of the traits was estimated therefrom. The estimates ranged from ۱.۳۳ to ۰.۰۲ and ۱.۴۸۱ to ۰.۰۳; ۱.۴۸ to ۰.۱۰ and ۰.۹۶ to ۰.۰۸; ۰.۹۷ to ۰.۱۲ and ۰.۸۹ to ۰.۰۴ at ۳۶ and ۴۰ weeks for SV, SM, SC and LS, respectively. Estimates from ,  and ranged from ۱.۴۸ to ۰.۰۲, ۱.۰۴ to ۰.۰۳ and ۰.۸۵ to ۰.۰۶ ; ۱.۱۰ to ۰.۰۴, ۱.۲۱ to ۰.۱۸ and ۰.۹۰ to ۰.۰۵; ۰.۹۶ to ۰.۰۹, ۱.۴۸ to ۰.۰۱and ۰.۷۶ to ۰.۱۰; ۰.۹۷ to ۰.۰۴, ۰.۸۹ to ۰.۱۲ and ۰.۶۹ to ۰.۰۸ for the four traits, respectively. Large additive genetic variances existed for most of the semen quality traits, especially the live sperm from sire and sire plus dam variance components of the reciprocal crosses at ۴۰ weeks. These traits were highly heritable and could be improved by individual selection.Main and reciprocal crossbred cocks from a population of ۵۳۱ day-old chicks were used to study heritability of semen volume (SV), sperm motility (SM), sperm concentration (SC) and live sperm (SP) at ۳۶ and ۴۰ weeks of age. Analysis of variance was performed for unbalanced nested design. The analysis yielded variance components of sire ( ), dam ( ) and sire plus dam ( ), and heritability (h۲) of the traits was estimated therefrom. The estimates ranged from ۱.۳۳ to ۰.۰۲ and ۱.۴۸۱ to ۰.۰۳; ۱.۴۸ to ۰.۱۰ and ۰.۹۶ to ۰.۰۸; ۰.۹۷ to ۰.۱۲ and ۰.۸۹ to ۰.۰۴ at ۳۶ and ۴۰ weeks for SV, SM, SC and LS, respectively. Estimates from ,  and ranged from ۱.۴۸ to ۰.۰۲, ۱.۰۴ to ۰.۰۳ and ۰.۸۵ to ۰.۰۶ ; ۱.۱۰ to ۰.۰۴, ۱.۲۱ to ۰.۱۸ and ۰.۹۰ to ۰.۰۵; ۰.۹۶ to ۰.۰۹, ۱.۴۸ to ۰.۰۱and ۰.۷۶ to ۰.۱۰; ۰.۹۷ to ۰.۰۴, ۰.۸۹ to ۰.۱۲ and ۰.۶۹ to ۰.۰۸ for the four traits, respectively. Large additive genetic variances existed for most of the semen quality traits, especially the live sperm from sire and sire plus dam variance components of the reciprocal crosses at ۴۰ weeks. These traits were highly heritable and could be improved by individual selection.

کلیدواژه ها:

chickens ، crosses ، heritability ، semen ، variance components

نویسندگان

Ugwumba Chijioke Isaac

Department of Animal Science and Technology, Nnamdi Azikiwe University, Awka, Nigeria

Adewale Iyaniwura Adeolu

Department of Agriculture (Animal Science Programme), Alex Ekwueme Federal University, Ndufu-Alike Ikwo, Abakaliki, Ebonyi State, Nigeria

Henry Okechukwu Ukwu

Department of Animal Breeding and Physiology, Federal University Agriculture, Makurdi, Benue State, Nigeria

Chinedu Anenechukwu Nwankwo

Department of Animal Science and Technology, Faculty of Agriculture, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria

Onyemauchechi Mercy Obike

Department of Animal Breeding and Physiology, Michael Okpara University Agriculture, Umudike, Abia State, Nigeria

S.N. Ibe

Department of Animal Breeding and Physiology, Michael Okpara University Agriculture, Umudike, Abia State, Nigeria

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