Scientific Society of Agricultural Sciences
Journal of Animal, Poultry & Fish Production
2314-8004
8
1
2019
11
01
Studies on Digestion Coefficients and Rumen Fermentation of some Improved Rations by Males of Sinai Sheep and Goats
1
8
59599
10.21608/japfp.2019.59599
EN
Tharwat, R. A. E. S. Soliman; M. El-Gayar; M. Yaseen
M.A. Ayoub
Journal Article
2019
08
14
In order to improve the productivity of Sinai sheep and goats, the effects of feeding with mineral mixture additives (experiment 1) and the mixture of mineral with alfalfa (experiment 2) on the digestion coefficients (dry matter (DM), organic matter (OM), crude protein (CP), crude fiber (CF), ether extract (EE) and nitrogen free extract (NFE)), nutritive values (total digestible nutrients (TDN) and digestible crude protein (DCP)) and rumen fermentation were evaluated. Experiment 1 was applied to evaluate two rations (1 and 2). Ration 1 contained concentrate feed mixture (CFM) and wheat straw (ratio 2:1) and ration 2 contained CFM with additive of 0.2% mineral mixture and wheat straw. Experiment 2 was applied to evaluate two rations (A and B). Ration A contained CFM, Alfalfa and wheat straw and ration B contained CFM mixed with 0.2% mineral mixture additive, Alfalfa and wheat straw. Three Sinai rams and three Sinai bucks aged 2-3 years were used. The rumen parameters as pH, ammonia-N, Volatile fatty acids, microbial protein and protozoa were measured in rumen fluid at 0, 2 and 4 hours after feeding. Results of experiment 1 indicated that the differences of digestion coefficients of nutrients between ration 1 and ration 2 were not significant, while the EE digestibility in ration 2 (55.6%) was significantly higher (P<0.05) than ration1 (53.3%) in the sheep. The digestion coefficients of DM (65.1%) and OM (67.1%) in ration 2 were significantly higher (P<0.05) than ration 1 (62.5% and 64.1%, respectively) in the goats. The digestion coefficients of CF (58.6%) and EE (58.5%) of ration B were significantly higher (P<0.05) than ration A (56.5% and 56.2%, respectively) in the sheep. The digestion coefficients of DM (67.4%) and OM (68.6%) in ration B were significantly higher (P<0.05) than ration A (65.7% and 67.1%, respectively) in the goats. In sheep, NFE of ration B was significantly (P<0.05) lower than ration A (70.4% and 72.9%, respectively). In goats, TDN values were significantly (P<0.05) higher in ration 2 than ration 1 (64.3% and 63.1%, respectively) and also in ration B than ration A (64.9% and 62.4%, respectively). The difference of NH<sub>3</sub>-N at 4h post feeding in rumen of goats was significantly (P<0.05) lower in ration 2 than ration 1 (17.7 mg and 21mg per 100 ml rumen liquid, respectively). The lowest values (P<0.05) of pH were recorded at 4 h after feeding in both breeds. In sheep, microbial protein (MP) in the rumen fluid was significantly (P<0.05) higher in ration B than ration A (0.90 g and 0.84 g per 100 ml rumen liquid, respectively). It could be concluded that using of the mixture of mineral additives (N.Candles© Pharm) in feeding Sinai sheep and goats can improve the digestion coefficients, nutritive values and rumen fermentation. Further studies in this area are recommended to evaluate effect of mineral additives on animal performance and its economical return.
https://japfp.journals.ekb.eg/article_59599_616643e6f26984229b8e0a033d688da7.pdf
Scientific Society of Agricultural Sciences
Journal of Animal, Poultry & Fish Production
2314-8004
8
1
2020
01
10
Genetic Profile of κ-Casein Gene Based on RFLP Technique in Association with Milk Traits in Egyptian Buffaloes
9
20
73381
EN
Al-Shawa, Z. M.;
S. A. Mokhtar
Animal Production Department, Faculty of Agriculture, Suez Canal University, Ismailia-41522, Egypt
Journal Article
2019
12
14
To reveal the linkage between κ-CN genotypes resulted from PCR-RFLP analysis and milk yield and composition traits, stepwise analysis was used for determining the best regression equation of those phenotypic traits on detected genotypes. 80 blood samples were used for genetic characterization of studied buffaloes, collected from five different geographical locations of Egyptian provinces with total of 340 dairy production records for 59 lactating buffaloes. Milk components profile was analyzed by MilkoScan device. Results of stepwise regression analysis showed that <em>Acu</em>I genotypes were significantly linked to most studied traits such as, TMY, FAT%, TS%, Ash%, and Humidity% with highly statistical. In some cases, the covariance between the independent variables (<em>Acu</em>I, <em>HpyCH4</em>IV, or compacted genotypes) represented the best regression equation, as with DMY and lactose%. Least-square means for studied traits showed that, heterozygous animals were significantly superior to homozygous animals, especially within <em>Acu</em>I or compacted genotyped animals. In other words, they could be considered the most superior individuals producing better milk with distinct fat%, TS%, SNF%, and Ash% traits. On contrary, homozygous animals had higher lactose percentage and humidity traits. Consequently, polymorphisms of κ-CN gene should be involved within modern selection programs as potential candidates associated with dairy performance traits referred to as gene assisted selection (GAS) that permits to select animals at an early age for breeding programs.
https://japfp.journals.ekb.eg/article_73381_a2279e021ff77c5c58e4556fe458bd29.pdf
Scientific Society of Agricultural Sciences
Journal of Animal, Poultry & Fish Production
2314-8004
8
1
2020
01
10
Genetic Differentiation between Egyptian Buffalo Populations Using Microsatellite Markers
21
28
73382
EN
Merdan, S. M.;
S. A. Mokhtar
Journal Article
2019
12
14
In this study, twelve microsatellite loci were utilized to determine genetic differences between five Egyptian buffalo populations and genetic characterization of these populations. A total of 80 blood samples were collected randomly from five farms in five different governorates (Cairo, Kafr El-Sheikh, Menoufia, Ismailia, and Beni Suef). The genetic parameters like number of alleles, allelic frequencies, F parameters inbreeding coefficient (F<sub>IS</sub>), Total inbreeding coefficient (F<sub>IT</sub>) and Population differentiation (F<sub>ST</sub>), deviation from Hardy-Weinberg Equilibrium (HWE), genetic distances and evolutionary relationships between pairs of studied buffalo populations were obtained using four different programs. Results revealed that all the five populations under study had significant deviations from HWE, as well all loci deviated significantly from HWE across all populations except locus BM1818. This is attributable to non-random mating and selection within these populations, presence of null alleles at some loci, and transfer of buffaloes from one place to another which led to underestimation of heterozygosity. Values of F<sub>IT</sub> across all populations were high, whereas, values of F<sub>ST</sub> were low, indicating the high degree of inbreeding in these populations and the low degree of genetic differentiation among them. The lowest genetic distance was found between Sids and Ismailia populations (0.200) while the highest genetic distance was detected between Kafr El-Sheikh and Ismailia (0.373). Genetic distances and neighbor joining showed that Sids and Ismailia populations were grouped together than the remaining groups (Cairo, Kafr El-Sheikh, and Shebeen El-Kom populations). The information obtained by this study will assist in the establishing effective breeding programs and furthermore, in conserving indigenous Egyptian buffalo breed in the future
https://japfp.journals.ekb.eg/article_73382_fd85c919dd7a428f7bed65b9e5801154.pdf