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ارزیابی استراتژی‌های اصلاح‌نژاد در مرغان بومی مازندران با استفاده از شبیه‌سازی رایانه‌ای

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه علوم دامی، دانشکده کشاورزی، دانشگاه کردستان

2 استاد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه کردستان

3 استادیار، گروه علوم دامی، پردیس ابوریحان، دانشگاه تهران

4 استادیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه کردستان

چکیده

هدف از پژوهش کنونی مقایسه استراتژی‌های اصلاح نژاد در گله­ مرغ بومی مازندران به کمک شبیه­سازی رایانه‌ای بود. صفات شبیه‌سازی­شده، وزن بدن در زمان تولد (BW1)، هشت هفتگی (BW8)، دوازده هفتگی (BW12)، زمان بلوغ جنسی (BWM)، سن بلوغ جنسی (AFE)، وزن اولین تخم­ (EWM)، میانگین وزن تخم­مرغ در هفته­های 28 تا 32 (EW28-32) و تعداد تخم­مرغ (EN) بودند. در استراتژی اول خروس­ها بر اساس ارزش اصلاحی صفت BW12 و مرغ­ها براساس یک شاخص چهار صفتی شامل BW12، AFE، EW28-32 و EN انتخاب شدند. در استراتژی دوم خروس­ها و مرغ­ها براساس یک شاخص چهار صفتی شامل BW12، AFE، EW28-32 و EN انتخاب شدند. در استراتژی اول پس از 10 نسل صفات BW1، BW12، BWM، EW28-32 و EWM به ترتیب به میزان 49/1، 81/573، 58/397، 96/3  و 75/3 گرم و AFE وEN  به ترتیب به میزان 51/3- روز و 09/2 تخم­مرغ بهبود یافت. در استراتژی دوم پس از 10 نسل بهبود صفاتBW12 ،BWM ، AFE و EN به میزان 78/415 و 74/218 گرم و 77/9- روز و 45/9 تخم‌مرغ بود. میانگین­های ضریب همخونی در استراتژی اول و دوم در پایان نسل دهم به ترتیب برابر 048/0 و 078/0 بود. نتایج حاصل نشان داد، استراتژی اول برای گله­های مادر با هدف تولید گوشت و استراتژی دوم برای گله­های دو منظوره با هدف تولید تخم­مرغ و گوشت مناسب می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

The evaluation of breeding strategies in Mazandaran native fowls using computer simulation

نویسندگان [English]

  • Babak Enayati 1
  • Amir Rashidi 2
  • Rostam Abdollahi Arpanahi 3
  • Mohammad Razmkabir 4
1 Ph.D. Candidate, Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
2 Professor, Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
3 Assistant Professor, Department of Animal and Poultry Science, Aburaihan Campus, University of Tehran, Iran
4 Assistant Professor, Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
چکیده [English]

The aim of the study was to compare two strategies in Mazandaran native fowls using computer simulation.  Simulated traits included body weight at birth (BW1), at eight weeks of age (BW8), at twelve weeks of age (BW12), at maturation (BWM), age at sexual maturity (AFE), weight of first egg (EWM), mean egg weight from 28 to 32 weeks of age (EW28-32) and egg number (EN). The first strategy was to select cockerels based on breeding value of BW12 and hens based on a selection index with 4-traits including BW12, AFE, EW28-32 and EN. The second strategy was to select cockerels and hens using a selection index based on a 4-traits including BW12, AFE, EW28-32 and EN. After 10 generations, the first strategy improved BW1, BW12, BWM, EW28-32 and EWM to 1.49, 573.81, 397.58, 3.96, and 3.75 grams and AFE and EN to -3.51 days and 2.09 eggs, respectively. After 10 generations, the gain for traits in the second strategy for BW12, BWM, AFE and EN was 415.78, 218.74 grams and -9.77 days and 9.45 eggs, respectively. At the end of the tenth generation increase of inbreeding in the first and second strategies was 0.048 and 0.070, respectively.  The results showed that the first strategy was suitable for a breeder flocks with the aim of chickens suitable for broiler production and the second strategy was suitable for a dual-purpose flocks with the aim of producing egg and meat.

کلیدواژه‌ها [English]

  • Breeder flock
  • dual purpose
  • inbreeding
  • optimum genetic contribution
  • selection Index
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