کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2074404 1544806 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of the Booroola (FecB) genotypes on growth performance, ewe's productivity efficiency and litter size in Garole × Malpura sheep
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Effects of the Booroola (FecB) genotypes on growth performance, ewe's productivity efficiency and litter size in Garole × Malpura sheep
چکیده انگلیسی

The present study was conducted to evaluate the effects of FecB genotypes on body weight, average daily gain (ADG), ewe's productivity efficiency (EPE) and litter size in FecB introgressed Garole × Malpura (GM) crossbred sheep. A total of 235 GM lambs were selected randomly and screened for FecB mutation using forced RFLP-PCR. The majority (69.8%) of GM individuals were carriers (BB and B+) for the FecB mutation and frequency of the FecB allele was about 0.40. The FecB genotypes were significantly (P < 0.01) associated with the lamb's body weights from birth to 12 months of age. The generation wise (F1, F2 and F3), lamb's body weight did not differ significantly at birth, 6 and 12 months of the age, while it differed significantly (P < 0.05) at 3 and 9 months of age. The ADG1 (0–3 months) was significantly associated (P < 0.05), but not the ADG2 (3–6 months) and ADG3 (6–12 months) between genotypes. Type of birth and sex significantly (P < 0.01) affected the body weight from birth to 12 months of age; and body weight of single born lambs was significantly higher (P < 0.01) than that of twins and triplets from birth to 12 months of age. Type of birth significantly (P < 0.01) affected the ADG1, but had no significant effect on ADG2 and ADG3. Year of birth did not affect the birth and weaning weights, but it significantly affected (P < 0.01) the body weight and ADG's after weaning ages. The EPE was affected significantly (P < 0.01) by the FecB genotypes at birth, 3 and 12 months of age. The EPE of B+ and BB ewes were 7.86 kg (36.9%) and 2.32 kg (10.9%) higher as compared to ++ ewes at 12 months of age, respectively. The mean litter size of BB ewes (2.17 ± 0.24) was significantly higher (P < 0.01) than that of B+ ewes (1.73 ± 0.04) and ++ ewes (1.03 ± 0.23). The present study indicated that the body weight and ADG of carrier lambs (BB and B+) was comparatively lower than that of non-carriers (++), while EPE of B+ ewes was comparatively higher than that of BB and ++ ewes. Further, it is interesting to note that heterozygous and homozygous state of individuals increased 0.70 and 1.14 extra lambs as compared to non-carriers (++), respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Reproduction Science - Volume 105, Issues 3–4, May 2008, Pages 319–331
نویسندگان
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