روند فنوتيپي صفات توليدي و رفتاري در يك جمعيت بسته زنبور عسل استان گلستان

Phenotypic trend of behavioral and productive traits in a closed population of honeybee in Golestan province

هدف از تحقيق حاضر، برآورد روند فنوتيپي صفات توليدي و رفتاري شامل رفتار عمومي كلني، جمعيت، مقدار گرده گل، زنده ماني يا قدرت ادامه حيات نوزادان و توليد عسل طي 5 نسل در يك جمعيت بسته زنبور عسل استان گلستان بود. ميانگين صفات موردمطالعه طي نسل هاي مختلف با استفاده از نرم افزار Minitab برآورد و مقايسه ميانگين ها با استفاده از آزمون دانكن انجام شد. به منظور برآورد روند فنوتيپي صفات طي نسل هاي مختلف، ضريب تابعيت صفات از نسل برآورد شد. تنوع و واريانس فنوتيپي اكثر صفات مورد مطالعه در طي نسل هاي متوالي انتخاب، كاهش يافت. صفات جمعيت و زنده ماني، بهبود قابل توجهي را در نتيجه انتخاب نشان دادند، در حاليكه پيشرفت مشاهده شده در صفات رفتار و توليد عسل ناچيز بود. بجز صفت رفتار، تابعيت همه صفات از نسل، مثبت و ضريب تابعيت كليه صفات (بجز توليد عسل) از نسل از لحاظ آماري معني دار بود (0/05

The aim of present study was to estimate phenotypic trend of behavioral and productive traits, included colony behavior, population, pollen, viability and honey production, during five consecutive generations in a closed population of honeybee in Golestan province. Descriptive statistics of traits were estimated for consecutive generations by Minitab 14 software and Duncan test was used to compare traits’ averages. Also, regression coefficients of productive and behavioral traits from generations were estimated. Phenotype variances of traits were reduced by selection. Obvious improvement for population and viability traits and slight improvement for behavior and honey production traits were observed through selection. Regression coefficients of all traits from generation were positive with the exception of behavior. These regressions were significant for colony behavior, population, pollen and viability traits (p<0.05) and varied from -0.13 to 0.63. These results showed that the selection hasimproved viability, population and pollen traits and has had a slight effect on honey production in closed population of honeybee in Golestan province that could be a result of negative correlation between honey production and other traits