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Articles by M.J.U. Sarder
Total Records ( 3 ) for M.J.U. Sarder
  R. Khaton , M.J.U. Sarder and M.R. Gofur
  Genotype has a significant effect on biological efficiencies of dairy cows. Environmental changes affect differently between different genotypes of animals. A biometrical study was conducted on reproductive organs of dairy cows (n = 100) of different genotypes (Local, Local×Holstein Friesian, Local×Jersey and Local×Sahiwal) available in Bangladesh. Reproductive tracts of cows were collected immediately after slaughter from different slaughter houses in Rajshahi, Bangladesh. The comparison of morphometric values of most of the parameters of reproductive tract observed in different genotypic cows showed significant differences (p<0.05). Local×Holstein Friesian had significantly higher values (p<0.05) on the most of parameters of genitalia measured, followed by the Local×Jersey, Local×Sahiwal and Local. Local×Holstein Friesian had the longest uterine horn (29.20±1.65 cm for right and 29.87±1.75 cm for left), uterine body (3.42±0.20 cm length and 2.83±1.40 cm width), cervix (5.64±0.24 cm length and 4.89±0.23 cm width) and vagina (24.66±0.64 cm length and 6.08±0.36 cm width). The right ovary was wider in diameter, larger in length and heavier in weight as compared to left one in all genotypes. This confirms the fact of right ovary being more active than the left one. Moreover, the biometry of ovary and tubular parts of genitalia in Local×Holstein Friesian and Local×Jersey cows are suggestive for selection of crossbred dairy cows to get maximum benefits from crossbreeding in respect of productive and reproductive performance and also for genetic improvement.
  M.J.U. Sarder
  The present study was to evaluate the effect of breed and intervals between collection on semen characteristics. Semen was collected from eight breeding bulls belonging to four genetic groups (100%SL, 75%F×25%L, 50%SL×50%F and 50%F×50%L). Genetic groups had a significant effect (P<0.05) on semen characteristics except motility and total number of semen collection per month. The highest sperm concentration, total number of motile sperm cells/jaculate and total number of semen doses per collection were found in 100%SL and lowest in 50%F×50%L. Similarly, intervals between collection significantly (P<0.05) affected all the semen traits except volume of ejaculate and total number of semen doses per ejaculate. The highest sperm concentration (1332±29 mill. Ml-1), total number of motile sperm cells/jaculate (5621±261.99 million), motility (64±0.24%) and total number of collection per month (5.84±0.23) was obtained with an interval <6 days between collection than the other interval groups. It was concluded that 100% Sahiwal and 50% Sahiwal ×50% Friesian for the genetic group and <6 days for the interval between collection were suitable for most of the semen parameters than all other groups.
  M.J.U. Sarder
  The present study were to evaluate the effect of individual bull, semen types, quality of bull semen, sources of semen on Non-return Rate (NRR) at 60 days of cows under field condition. A total 75550 cows were inseminated with 71 bull semens from Central Cattle Breeding Station and Dairy Farm (CCBSDF), Savar, Dhaka, Rajshahi Dairy and Cattle Improvement Farm (RDCIF), Rajabarihat and District Artificial Insemination Centre (DAIC), Rajshahi under 40 Artificial Insemination (AI) sub-centres/points of District AI centre, Rajshahi. The overall NRR was obtained 78.54% with chilled and frozen semen produced from three AI centres/stations. Analysis of variance showed that individual bull semen had significant (p<0.05) effect on NRR at 60 days after first insemination. Semen types, quality of bull semen and sources of semen had significant (p<0.001) effect on NRR at 60 days of cows. The significant (p<0.001) highest NRR (82.32%) was with chilled semen and lowest was with frozen semen (76.39%). The significant (p<0.001) maximum NRR (83.12%) was for the best quality bull semen and minimum (70.13%) for the poor quality bull semen. Significant (p<0.001) higher NRR (82.32%) was in semen from DAIC, Rajshahi and lower (73.01%) in semen from RDCIF, Rajabarihat. Results suggested that the NRR of cows at 60 days after first insemination under field condition may be a good practice to discard poor fertility semen among the individual bull semen, semen types (chilled and frozen), quality of bull semen (poor, good and best) and sources of semen (CCBSDF, Savar, RDCIF, Rajabarihat and DAIC, Rajshahi) for artificial insemination programme in Bangladesh.
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