Comparison of milk production and milk composition for an exotic and a local synthetic rabbit lines

El-Sabrout, Karim; Aggag, Sarah; El-Raffa, A. M.

doi:10.14202/vetworld.2017.526-529

Cited by 6 publications

(7 citation statements)

References 11 publications

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“…Thus, the three groups showed the same pattern of milk production during the whole period of lactation. Our findings are fully agree with those of Lukafahr et al (1983), Cherenk et al (2007 and El-Sabrout et al (2017), they reported that, rabbits milk is elevating gradually until the day 20 of lactation, afterwards it is declined reaching to the end of lactation (generally at day 30 of lactation).…”

Section: Productive Performance: 31 Milk Yieldsupporting

confidence: 94%

Physiological, Reproductive and Productive Performance of Rabbit Doesas Influenced by N-Acetylcysteine Administration

Ashour

Abdel-Rahman

Morsy

et al. 2018

Egyptian Journal of Rabbit Science

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The present study was carried out in Rabbit Research Unit at Sakha Research Station located in Kafr El-Shiekh governorate, Egypt to assess the impact of N-acetylecysteine (NAC) administration on the physiological, reproductive and productive performance of rabbit does. A total number of 21 pregnant, healthy, primiparous New Zealand White (NZW) rabbit does aged between 5-6 months with an average initial body weight (BW) of 3052 g were used. They were divided into three equal groups. The first group (G1) was served as control group without any administration. The second and third groups (G2 and G3) were injected subcutaneously with 50 and 100 mg NAC / kg BW, respectively. The injection with NAC doses started on day 14 of pregnancy and continued for seven consecutive days. The experiment lasted continuously for three months. The obtained results showed that, NAC treatment reduced the oxidative stress in pregnant rabbit does, G2 and G3 had the highest values of GST and the lowest values of both MDA and H 2 O 2 in comparison with those of G1.Total protein, albumin, globulin and A/G ratio did not significantly affected by NAC injection and tended to increase with pregnancy progress. In contrast, level of triglycerides decreased (P<0.05) in G2 and G3 than that of G1 and declined with progress of gestation till kindling. Treated groups decreased their blood urea nitrogen (BUN) values and increased their creatinine (CR) levels than those of G1. With progress of pregnancy, levels of BUN tended to decrease and CR levels tented to increase. Both transaminase enzymes (AST and ALT) activities decreased by NAC treatment and by pregnancy progress, particularly in G3. The changes in live BW of does in the three groups across the experimental period were insignificant. NAC injection achieved weaning day, G2 and G3 had heavier kits' weight than those in G1 by 26 and 20 %, respectively. Litter size increased obviously due to NAC treatment by 19 to 35 % in G2 and by 5.5 to 23.1 % in G3 than that in G1 during the all experimental days. Mortality rate reduced by NAC injection being the lowest in G2 (4.7 %) followed by G3 (11.2%) and the highest in G1 (23.6 %). Total milk yield was increased significantly in G3 and insignificantly in G2 compared to that of G1 by 17.5 and 4.5 %,respectively. The high dose was more effective in promoting milk production. The effect of NAC treatment on all milk components was insignificant, except milk lactose. From the first wk to the last wk, milk composition (%) of milk protein, milk lactose, milk total solids and milk solids not fats increased (P<0.05) whereas milk fat decreased. In conclusion, this study proved not only the effectiveness, but also the safety of NAC application and its capability to improve rabbit's performance particularly with high dose (100 mg/kg BW). Further studies are urgently needed to confirm our findings.

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Section: Productive Performance: 31 Milk Yieldsupporting

confidence: 94%

Physiological, Reproductive and Productive Performance of Rabbit Doesas Influenced by N-Acetylcysteine Administration

Ashour

Abdel-Rahman

Morsy

et al. 2018

Egyptian Journal of Rabbit Science

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“…It is important to stress that the genotypes differed in the average size of produced litters (8.2 vs. 8.7; transgenic vs. non-transgenic). In contrast to the study results of Chrenek et al [19] (day 20 of lactation), the research of El-Sabrout et al [42] compared two rabbit lines and found a lower milk yield for rabbit does in the third lactation week, measuring 243 mL/day in V-line and 239 mL/day in Alexandria line. El-Sabrout et al [42] concluded that the similar milk yield in both lines was related to the similar average litter size (8.9 in V-line; 8.4 in Alexandra line).…”

Section: Discussionmentioning

confidence: 71%

“…The content of lactose determined in their research measured 2.58% in the milk of the V-line and 2.51% in the milk of the Alexandria line. The contents of protein (8.41% vs. 10.50%; V-line vs. Alexandria line) and fat (11.03% vs. 13.78%; V-line vs. Alexandria line) given by El-Sabrout et al [42] were significantly affected by the genotype (p < 0.05). In the research of Kolawole et al [43] on the chemical composition of rabbit colostrum and mature milk, they found much higher contents of total solids, protein, and fat in the colostrum (31.52 g/100 g; 13.5 g/100 g; and 15.2 g/100 g) compared to mature milk analyzed on days 7 (27.61 g/100 g; 11.6 g/100 g; and 11.6 g/100 g), 14 (29.03 g/100 g; 11.1 g/100 g; and 12.1 g/100 g), and 21 (28.0 g/100 g; 10.8 g/100 g; and 11.7 g/100 g).…”

Section: Discussionmentioning

confidence: 79%

“…These changes were different compared to the milk fat measures in our study. An analysis was done by El-Sabrout et al [42] on the chemical composition of milk collected in the third lactation week from two rabbit lines. The content of lactose determined in their research measured 2.58% in the milk of the V-line and 2.51% in the milk of the Alexandria line.…”

Section: Discussionmentioning

confidence: 99%

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Hycole Doe Milk Properties and Kit Growth

Ludwiczak

Składanowska-Baryza

Kuczyńska

et al. 2020

Animals

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The level of production and the physiochemical traits of rabbit milk affect the growth and the mortality of bunnies during lactation. The goal of the study was to analyze the effect of litter size and day of lactation on the quality traits of rabbit milk, milk production, and associative traits. The study was conducted on 32 Hycole does and their litters. The rabbit milk pH ranged from 6.61 to 7.46. The colostrum was characterized by the highest content of total solids (31.54 and 31.80 g kg−1) and fat content (15.73 and 15.9 g kg−1). The milk from the beginning of the lactation was characterized by the highest level of somatic cell count (SCC) (523.67 and 536.57 103 mL−1), which gradually decreased to reach the lowest level on days 17 and 21 of lactation. The daily milk production was greater for does nursing 10 kits per litter compared to those nursing eight kits per litter (p < 0.001). The peak of milk production occurred on day 17 postpartum. To conclude, the litter size has a clear effect on milk production as well as litter weight and litter weight gains. It is also important to note that the day of lactation affected the physiochemical traits of rabbit milk.

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“…Another report by Emam et al (2016) demonstrated that the native Red and Black Baladi breeds are endangered. In 2005, the Alexandria line was established from the crossing of Spanish V-line rabbits (maternal line) with Black Baladi (paternal line) rabbits (El-Raffa, 2007;El-Sabrout et al, 2017).…”

Section: W O R L D R a B B I T S C I E N C Ementioning

confidence: 99%

Mitochondrial D-loop sequences and haplotypes diversity in Egyptian rabbit breeds

Ahmed¹,

Ali²,

Abdelhafez³

et al. 2022

World Rabbit Sci.

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Rabbit breeds in Egypt are local and adapted foreign breeds that have been imported since the middle of the last century. Stressful environmental conditions including climatic changes, exposure to diseases and breeding selection have an influence on how gene flow has shaped the genetic diversity of the breeds. Mitochondrial DNA D-loop is a genetic marker used to trace the geographic distribution of genetic variation for the investigation of expansions, migrations and other gene flow patterns. The study aimed to determine the genetic diversity of the mitochondrial DNA D-loop (mtDNA D-loop) in Black Baladi, Red Baladi, Gabali, APRI line and New Zealand breeds to gather the scientific data required to create a proper conservation and sustainable management plan. Blood samples were taken from animals unrelated to each other. A 332-bp of mtDNA D-loop was successfully amplified and alignment sequences were deposited in the GenBank database. The results detected six haplotypes in the five breeds. Haplotype diversity within individual breeds varied from 0 (Red Baladi) to 0.551±0.114 (Gabali). The nucleotide diversity (π) value was relatively low (0.001-0.006), with greater values in APRI and New Zealand. Pairwise distances between breeds yielded varying values ranging from 0 to 0.254, and the values between the Red Baladi and other breeds were comparatively high, with pairwise distances from 0.172 to 0.254. The phylogenetic analysis involved 74 nucleotide sequences of the Egyptian rabbit and thirty-one sequences retrieved from GenBank of the reference samples of different haplogroups. The results of the phylogenetic analysis correlated to the reference mtDNA GenBank database showed that the five Egyptian rabbit breeds were grouped into haplotypes A, B and K. The results of the genetic diversity using mtDNA shed light on the importance of the local breed’s genetic diversity information and revealed unique mtDNA haplotypes, which is an important finding for breeding strategies designed to conserve genetic variants and provide sustainable management.

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Comparison of milk production and milk composition for an exotic and a local synthetic rabbit lines

Cited by 6 publications

References 11 publications

Physiological, Reproductive and Productive Performance of Rabbit Doesas Influenced by N-Acetylcysteine Administration

Physiological, Reproductive and Productive Performance of Rabbit Doesas Influenced by N-Acetylcysteine Administration

Hycole Doe Milk Properties and Kit Growth

Mitochondrial D-loop sequences and haplotypes diversity in Egyptian rabbit breeds

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