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Birsa Agricultural University, Ranchi

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Subject: Animal Genetics and Breeding × End date: 2022 × Thesis Type: M.V.Sc. ×
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Now showing 1 - 9 of 28
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    ThesisItemOpen Access
    Genetic And Phenotypic Studies On some Productive And Reproductive Traints Of Murrah Buffaloes
    (Birsa Agricultural University, Ranchi, 2001) Sujit Kumar Kundu; R.S.Panday
    1)Significant effect of period on different economic traits and better performance during 1995-2000 suggested that managemental practices of the farm in recent years have improved over the past. (2) Most of the earlier components of lactation such as initial milk yield, peak yield, days to attain peak yield, total yield up to peak and rate of increase up to peak indicated that first calvers are unable to express their genetic potentials fully as compared to second and third calvers. (3) Season of calving did not influence the economic traits, indicating that the traits under study remain unaffected by seasonal variability. (4) Phenotypic correlations of early components of lactations such as initial milk yield, peak yield, days to attain peak yield, total yield up to peak, days to attain peak yield and rate of increase up to peak with lactation yield indicated that lactation yield could be judged from early components of lactations effectively. (5) No definite patterns in genetic and phenotypic trends was observed in this study is indicative of large magnitude of environmental variations over the years. (6) Estimates of expected breeding value suggested that regular progeny testing of sires should be done and only progeny tested sires should be encouraged for semen bank.
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    ThesisItemOpen Access
    Studies on Intensity Of Selection On Response and Correlated Response In Mice
    (Birsa Agricultural University, Ranchi, 1999) Sanjay Kumar; .D.K.Mukherjee
    (1) The heritability of litter size at weaning was medium in magnitude while 6-wk. weight and tail length moderate in the base population. Litter size at weaning had negative genetic and phenotypic association with 6-wk. weight and tail length. However, the relationship (genetic and phenotypic) between weight and tail length at 6-wk. was positive and high in magnitude significant. (2) Heritability estimates for 6-wk. weight were moderate to high in magnitude in different line and generation, while were medium to high in magnitude for 6-wk. tail length, indicating scope of further improvement by selection. (3) In selected lines, heritability estimates for weaning litter size were low in magnitude indicating that improvement is possible by exploiting non-additive genetic variance. (4) Negative phenotypic and genetic correlations of weaning litter size with body weight and tail length at 3 and 6-wk. of age, further confirmed negative association between them. (5) The direct response in 6-wk. weight was markedly high with 50% level of selection than that of 75 % level of selection. Whereas observed response in 6-wk. tail length was also high with 50% level of selection. than that of 75 % level of selection for 6-wk. tail lenght.
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    ThesisItemOpen Access
    Studies On Genetic And Phenotypic Parameters Of Some Economic Traits Of Goats
    (Birsa Agricultural University, Ranchi, 2000) Narendra Kumar; Dr.L.B.Singh
    1.Higher post-weaning body weight of Beetal halfbreds than Jamunapari halfbreds and purebred Black Bengal indicated that Beetal bucks could be utilized as improver for developing a potential breed of goat for meat production. 2 Significant effect of sire on post-weaning body weight up to 36 week of age indicated that the sire selection will be helpful in improvement of body weight of kids. 3 The decline in superiority in body weight of winter born kids over those born during summer and monsoon immediately after weaning indicated that winter born kids should be cared properly during early post-weaning period for better performance. 4. Higher body weight of F at 48-week of age is mainly due to difference in weaning weight and maternal influence during pre weaning period. 5.Post-weaning body weight of kids at 24, 36 and 48-week of age was positively associated with their birth weight. Dam's weight at kidding also had positive association with post-weaning weight up to 36-week of age. 6.Halfbreds were significantly taller and longer than the purebreds. 7. The post-weaning survivability of both the halfbreds was negatively associated with litter size at birth
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    ThesisItemOpen Access
    Genetic Architecture of pre - wearing growth and survivability of black Bengal and its half- bred kids
    (Birsa Agricultural University, Ranchi, 1999) Saroj kumar; Dk.Singh 'Dron'
    Following conclusions were drawn on the basis of the present findings: Higher pre-weaning growth, survivability of Jamunapari and Beetal halfbreds than purebred Black Bengal revealed that the Jamunapari and Beetal bucks could be utilized as improver for evolving a potential and adaptable breed of goats for meat production. Non-significant effects of sires on absolute weaning weight, relative growth rate in weight during 0-12 weeks of age and survivability of kids during 0 90 days of age indicate that the sire's selection or ranking will be of little importance for altering pre-weaning growth and survivability. However, male kids born as twins of comparatively high milk yielder does should be selected on the basis of body weights at birth, 3 and 6-month of age for breeding purpose.
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    ThesisItemOpen Access
    Genetic Studies on Some Economic Traits With Special Reference To Effect Of Inbreeding In Pigs
    (Birsa Agricultural University, Ranchi, 1999) Sanjeev Kumar; K.Singh
    1 Genetic group had significant influence on all the growth and reproductive traits. 2. Exotic pigs are superior with respect to growth and reproductive traits followed by crossbreds and Desi. 3 Among exotics, Landrace performed better than Tamworth. 4. There was progressive improvement in the performance of growth and reproductive traits with the increase of exotic inheritance but just opposite trend was observed with respect to age at first farrowing. 5 Growth rate of suckling piglets during pre-weaning period decreased with the increase of litter size at birth of dam 6 There was a significant increase in pre-weaning growth rate with increase of their birth weight. Similarly post-weaning growth rate increased progressively with the increase of their weight at the time of weaning 7 Lower rate of growth just after weaning in almost all the genetic groups suggested need of special care and management at that stage. 8 Inbreeding adversely affected all the traits under study viz. decrease growth rate and reproductive performance and increase mortality rate svoided as far as possible
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    ThesisItemOpen Access
    Studies on Genetic and Phenotypic Parameters of Some Economic Traits and Construction of Selection Indices in Black Bengal And Its Beetal Half-Bred Goats
    (Birsa Agricultural University, Ranchi, 1997) Devesh Kumar Singh; Dr.S.K.Verma
    1. Beetal halfbreds were superior to purebred Black Bengal with respect to growth under farm condition of management. II. Males were significantly heavier than females at birth. III. The body weight and body biometries were more in single barn kids than that of twins. IV. Winter born kids were significantly heavier than that of summer and monsoon barn kids in both the genetic groups. V. All growth traits were significantly better during early years of establishment of farm. VI. Body weights, biometries and daily gain in weight during 0-3 and 3-6 months of age had generally significant positive linear association with birth weight and dam's weight at kidding. VII. Beetal halfbreds were superior to that of pure bred Black Bengal goats in most of the milk production and reproduction traits.
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    ThesisItemOpen Access
    Genetic Studies of Some Economic Traits of Black Bengal and Its Beetal Halfbreds under Farm And Village Conditions
    (Birsa Agricultural University, Ranchi, 1995) Nirmal Kumar Singh; Dr. D.K. Mukharjee
    Following conclusions were drawn on the basis of present findings: Beetal halfbreds were superior to purebred Black Bengal with respect to growth under both managemental systems, Growth of kids of both genetic groups was better under farm than village condition of management. Results suggested need of special care to Beetal halfbreds during pre- and post-weaning periods for better gain in body weight under village condition of management. Positively significant phenotypic and positive and moderate to high magnitude of genetic correlations among body weights at all ages indicated that the kids could be selected for higher body weight at 6th month of age on the basis of their weights at early ages from birth to 5th month. Birth weight and gain in body weight upto 6th month of age had negative association with litter size at birth. Body weights had positive linear association with dam's weight at kidding. Body weight at 6th month of age can be predicted with 72.31 and 67.07% accuracy on the basis of weights at birth 1,2 and 3 months of age under village and farm conditions of management
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    ThesisItemOpen Access
    Studies on Some Genetic And Non-Genetic Factors Affecting Carcass Traits In Pigs
    (Birsa Agricultural University, Ranchi, 1994) Durgesh Dutta Jha; Dr.S.Nath
    1. Genetic group had highly significant effect on all the carcass traits under study. 2. In general, Hampshire was superior in respect to most of the carcass traits than those of other two exotic breeds (LVY and LR) followed by T X D, LMY half breds and Desi. 3. Age and weight had significant influence on almost all the carcase traits, 4 Although sex had non-significant influence on most of the carcass traitc but females were elightly superior than males in almost all the caroase traite, 5.The animal kept on concentrate feed were superior to animal reared on hotel wastes concentrate feed followed by animal maintained on kitchen want+ grazing.
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    ThesisItemOpen Access
    Genetic Studies on Some Economic Traits in Exotic, Desi Pigs and Their Crosses under Farm and Village Condition of Rearing
    (Birsa Agricultural University, Ranchi, 1994) Rameshwer Narain Pandey; Dr. S.K. Singh
    1.Genetic group had significant effect on all the growth traits under study at various stages. of life both under farm and village conditions of rearing. (11) In general, higher body weight was observed in Hampshire than those of LWY & T&D followed by halfbreds (LWY x D&H x D) and desiunder farm conditions of rearing, whereas, the values under village conditions of rearing was found to be highest in T&D than those of LWY halfbreds followed by Large White, Hampshire, Hampshire halfbreds and Desi. (iii) Almost similar growth rate were recorded in T&D and LWY halfbreds, but both were significantly superior to Hampshire halfbreds. (iv) Males were slightly superior to females in growth rate at most of the ages, but the differences were non-significant statistically. (v) Growth rate during preweaning period decreased with the increase of litter size at birth of their dam. (vi) There was significant increase in pre weaning growth rate with the increase of their birth weight but it had non-significant influence on post weaning growth rate. (vii) There was a significant increase in post-weaning growth rate in progressive manner with the increase of their weight at the time of weaning.