ABSTRACT
The present study was conducted to observe the effect of percoll density gradient centrifugation on quality of semen. Ejaculates were collected by AV method from Sahiwal bulls. X-sperm enrichment was done by percoll density gradient method i.e. 7 layers (70-10%). Centrifugation was done at 750 g (22-24°C) for 15 min. The pellets obtained were diluted in EYC medium. Semen quality was evaluated in fresh semen (Control), in pellet of normal centrifugation (Group I), supernatant of centrifugation in percoll density gradient (Group II) and pellet of centrifugation in percoll density gradient (Group III). To assess the quality of enriched semen pH, mass motility, progressive motility, live spermatozoa %, abnormal spermatozoa %, HOST % and intact acrosome % were evaluated. Number of progressively motile sperms in pellet of X- enriched semen were non-significantly increased and significantly (P<0.05) decreased in supernatant. The abnormal spermatozoa (%) were decreased in G III as compared to G II Live spermatozoa (%) were increased in enriched semen (pellet). Number of Intact sperms decreased significantly (P<0.05) in supernatant of percoll density gradient centrifuged Sahiwal semen. HOST responsive sperms number was not affected after percoll density gradient centrifugation. Thus, the semen quality of X-sperm enriched semen by percoll density gradient method (7 layer 70%) was not affected hence it can be used to increase female calves’ birth after A.I.
ABSTRACT
The present investigation was conducted to assess the effect of Shatavari root powder (Asparagus racemosus) supplementation on milk composition of Sahiwal crossbred cows during summer season on twenty lactating Sahiwal crossbred (H.F. × Sahiwal) cows in early stage of lactation were selected for the experiment. All the cows were randomly divided into two groups T1 (control) and T2 (Treatment) of 10 in each group. The treatment group was provided Shatavari root powder @ 50 g/head/day for 90 days post partum. Data related to milk composition takes fortnightly interval. The overall average milk fat, Protein and Lactose percent during the experimental period in T1 and T2 groups were 3.77 ± 0.01, 3.84 ± 0.03, 3.43 ± 0.01 and 3.46 ± 0.01, 4.54 ± 0.06 and 4.69 ± 0.06 percent respectively, there was no significant (P<0.05) differences between T1 and T2 groups. The overall average solid not fat (values) and total solid (values) differed significantly (P<0.05) between T1 and T2 groups 8.84 ± 0.04, 9.11 ± 0.11, 12.66 ± 0.03 and 13.02 ± 0.14% in T1 and T2 groups was significantly (P<0.05)
ABSTRACT
The present investigation was carried out with the total of 18 Sahiwal cattle of 1st to 4th parity were selected for the study and distributed into three different groups based on their pre calving BCS (before 15 days of expected date of calving) namely G1 (2.50 - 3.00), G2 (3.25 - 3.75) and G3 (4.00 and above) with six animals in each group. The average fortnight milk yield increased up to 60th day and thereafter declined up to 90th day in G1, G2 and G3 group of animals, which was significant (p<0.05) up to 75th day. G3 group animals had highest average fortnightly cumulative Milk yield (Kg) in entire study period. Highest 305 days predicted lactation milk yield (2462.66 Kg /lactation) and average peak yield (16.50 Kg/ animal) was obtained in G3 group animals and the lowest predicted lactation milk yield (1870.68 Kg/lactation). The 305 days predicted lactation milk yield in G2 group animals was 2356.75 Kg /lactation and average peak yield was 14.90 Kg/ animal. The G3 group animals also attained their peak yield in 46 days compared to G2 and G1 group animals with 51 and 54 days, respectively. The persistency of milk production was highest in G2 group animals with 65.63 % followed by G3 and G1 group animals. The studied revealed that BCS had a significant (P<0.05) effect on post-partum estrus and service period in experimental animals
ABSTRACT
The present study evaluated the effect of circulatory trace mineral profiles on fertility response during estrus induction by progesterone based therapy in acyclic Sahiwal cattle. Sahiwal cows and post-pubertal heifers (n=25 each) with true anestrus condition (acyclicity confirmed ultrasonographically) were subjected to CIDR-based protocol (intravaginal CIDR application for 7 days, 500 IU eCG at CIDR removal, followed by estrus observation and AI). In heifers, additionally an injection of 5.0 mg estradiol valerate at CIDR insertion was given. Blood samples on days 0 (before CIDR application), 3, 5, 7 and 9 were collected. Almost similar estrus induction (68% vs. 64%) and subsequent conception rates (41.2% vs. 50%) during the first induced estrus were recorded in cows and heifers, respectively. During the course of treatment, significant (P<0.05) variation in plasma copper and zinc concentrations was recorded both in cows and heifers. Contrarily, manganese concentrations varied significantly (P<0.05) in cows only. However, iron profiles remained uniform during the course of treatment. Significantly (P<0.05) higher pre-treatment plasma concentrations of copper, zinc and manganese was recorded in those cows and heifers in which estrus was induced, compared to those in which estrus induction failed to occur. No significant difference (P>0.05) was recorded for iron concentration vis-à-vis estrus induction response. Hence, it is indicated that circulatory copper, zinc and manganese profiles influence the reproductives energy in acyclic animals and their suboptimal profiles may reduce the efficacy of estrus induction protocols in Sahiwal cattle.
ABSTRACT
An experiment was conducted to evaluate the effect of supplementation of rumen protected methionine (RPM) and rumen protected lysine (RPL) individually and in combination on nutrient utilization and growth performance in twenty Sahiwal female calves. Sahiwal female calves having age groups of 7 to 12 months and between 80 to 111 kg body weights were randomly allotted into four groups of five animals in each, viz., T1 (basal diet), T2 (basal diet with RPM 5 g/d), T3 (basal diet with RPL 15 g/d) and T4 (basal diet with RPM 5 g plus RPL 15 g/d) their body weight for 90 days. The results revealed that intake of DM and CP were similar amongst all four groups. Digestibility of nutrients was also similar amongst the groups while average daily gain was found to be better in supplemented groups
ABSTRACT
Adiponectin (ADIPOQ) gene regulates the glucose metabolism, insulin sensitivity, fatty acid oxidation, immunity and reproduction. In the present investigation, PCR-RFLP method was conducted to identify the genetic polymorphism in intron 2 region of adiponectin (ADIPOQ) gene in Indian Sahiwal cattle. PCR of intron 2 of ADIPOQ gene fragment produced amplicon of 961 bp which was subsequently digested with RsaI restriction enzyme. The RsaI/PCR-RFLP assay revealed monomorphic pattern only, TT genotype (wild type homozygote) in Sahiwal cattle population which was confirmed by sequencing. The obtained sequences of ADIPOQ after aligning revealed absence of RsaI recognition site GTAC and consequently, the association study with economic traits could not be performed
ABSTRACT
Secreted phosphoprotein 1 (SPP1) is popularly known as osteopontin (OPN), which plays an important role in initiation and maintenance of pregnancy, as well as in the development of the fetus and milk production. In the present study, investigation of G>T polymorphism in exon 7 region of SPP1 gene was undertaken in 147 Sahiwal and Hariana cattle maintained at Livestock Farm Complex (LFC), DUVASU, Mathura using HpyCH4IV/PCR-RFLP assay. Amplification of SPP1 exon 7 region revealed 204 bp product and HpyCH4IV restriction digestion screening showed monomorphic pattern. Only one type of genotype, namely, TT (204 bp) was observed in population. The frequency of TT genotypes was 100% in all screened samples with T allele (1.0). The results revealed that SPP1 T allele seems to be fixed in screened cattle population. Consequently, we could not perform the association study of this substitution with milk production traits
ABSTRACT
In the present study, insulin and insulin-like growth factor-I (IGF-I) administered during mid-luteal phase of the estrous cycle and effect on biochemical profiles of Sahiwal donor cows was noted. Altogether eighteen cows (n=18) were selected and divided into 3 groups; control (n=6, untreated), T-I (n=6, Insulin-treated) and T-II (n=6, IGF-I treated). Superovulatory treatment was started on day 9th of the estrous cycle. With the 6th dose of FSH, prostaglandin was injected to induce superovulatory estrus. The superovulated cows were bred and superovulatory response of each animal was recorded. The collections of embryos were done non-surgically on the 7th day of superovulatory estrus. About 15 ml blood without anticoagulant was collected on days 5,7,9,11,13,15,17,19 and 21st or day of embryo recovery where day 0 of estrous cycle was taken as the day of estrus. Serum was separated, centrifuged at 3000 rpm for 15 minutes and transferred into sterilized serum vials. All samples were stored at -20 oC till analysis. Serum glucose, cholesterol, total protein, urea, and creatinine were estimated by Span Diagnostic Kits. The concentration of serum glucose increased significantly in insulin-treated and IGF-1 treated Sahiwal donor cows. It may be concluded that exogenous insulin and IGF-1 administration during mid-luteal phase may be helpful in follicular and embryonic development by increasing the level of serum glucose. The concentration of serum cholesterol, total protein, urea, and creatinine remains unaffected