Body Weight is an Important Trait for Comparisons of Goat Breeds

محورهای موضوعی : Camel

پی.م. پارس کاسانوا ¹ ( Department of Animal Production, University of Lleida, Av. Alcalde Rovira Roure, 191 25700 Lleida, Catalunya, Spain )

تاریخ دریافت : 1393/02/06 تاریخ پذیرش : 1393/03/25 تاریخ انتشار : 1394/03/11

کلید واژه: body trait, dendrogram, morphological trait, zoometry,

چکیده مقاله :

Eleven goat breeds of different origin (10 Spanish and 1 African) were considered for this study: Zambian Dwarf, Azpi-Gorri, Blanca-Andaluza, Blanca-Celtibérica, Blanca de Rasquera, Catalana, Malagueña, Moncaína, Murciano-Granadina, Negra Serrana and Pyrenean. Nine linear body measurements for females, as well as the body weight ratio between gender and body weight, were obtained from literature and compared. Our results showed that the two principal components (PC) accounted for near 94% of total variation. The PC1 included the ratio between sexes, body weight and thoracic perimeter while the PC2 included body weight and ratio of body weight between sexes. Interestingly, all these high discriminating traits - body weight, body weight ratio between gender and thoracic perimeter- are related with body weight. The clustering of breeds according to those three traits offered a good picture of breeds according to their origin, with a cophenetic correlation, a measure of how faithfully a dendrogram preserved pairwise distances between the original unmodeled data points, high.

چکیده انگلیسی:

یازده نژاد بُز از مناطق مختلف (10 نژاد اسپانیایی و 1 نژاد آفریقایی) در این مطالعه مورد بررسی قرار گرفتند. این نژادها شامل کوتوله زامبیان، آزپی-گوری، بلانکا-آندالوزا، بلانکا-سلتیبریکا، بلانکا دِراسکوئرا، کاتالانا، مونکاینا، مورسیانو-گرانادینا، نگراسررانا و پیرنین بودند. نُه اندازه بدنی خطی برای ماده­ها و نسبت وزن بدن بین جنس­ها و وزن بدن از مقالات مختلف استخراج و مقایسه گردیدند. نتایج نشان داد که دو مؤلفه اصلی (PC) نزدیک به 94 درصد از تنوع کُل را توصیف می‌کردند. PC1 شامل نسبت بین جنس­ها، وزن بدن و دور سینه بوده و PC2 شامل وزن بدن و نسبت وزن بدن بین جنس­ها بود. همه صفات با تمایز بالا (شامل وزن بدن، نسبت وزن بدن بین جنس­ها و دور سینه) به وزن بدن مرتبط بودند. خوشه­بندی نژادها بر اساس این سه صفت تصویر خوبی از نژادها بر مبنای منشأ جغرافیایی آنها ارائه داده و همبستگی کوفنتیک (معیاری از مناسب بودن یک دندروگرام برای نشان دادن فاصله­های جفتی بین نقاط داده­های اصلی مدل نشده) بالا بوده است.

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