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Birsa Agricultural University, Ranchi

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Subject: Animal Genetics and Breeding × End date: 2007 ×
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Now showing 1 - 9 of 21
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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.
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    ThesisItemOpen Access
    A Studies on Some Economic Traits of Reciprocal Crosses of White Leghorn and Desi Birds Under Farm and Village Condition
    (Birsa Agricultural University, Ranchi, 1982) Krishna Murari Sah; Dr. B.D. Sharma
    This study was undertaken to find out the combining ability between White Leghorn and Desi birds for growth, production and carcass characters. (1) The combining ability of WL male with Desi female vas better than those of Desi male with WL female with respect to fertility, hatchability and early embryonic death. (2) The progeny of Desi do x ML op were heavier than their counterparts (bdx Desi gg) at all stages of growth. (3) The growth of KL and Desi box wL oo birds was superior under farm conditions of rearing, while that of the other two genetic groupe (Desi and Loox Desi oo) were better under village conditions of rearing at 12th, 16th and 20th week of age. (4) The dressing percentage of Deni birds was more in comparison to other genetic groups. (5) The co-efficient of determination (R2) for prediction of dressed weight on live weight was 97.30, 99.73, 83.17 and and WL66 Desagg 99.75% in L. Desi, Desi box a co males slaughtered at 12th week of age. (6) Desi 60' x L 0o birds were 31.8, 33.3, 1.4, 15.7, 67.9. 30.0, 56.0, 19.4 and 13.6 percent superior to Desi birds for hatching weight, weight at 20th week of age, weight at first lay, age at first lay, egg production upto 240 days of age, clutch size, weight of first egg. length and width of first egg respectively
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    ThesisItemOpen Access
    Genetic Studies on Some Economic Traits in Broiler Chickens
    (Birsa Agricultural University, Ranchi, 1985) Dipankar Chaudhuri; Dr.S.K.Verma
    1. The body weight and shank length in Red Cornish tended to be larger than that of the White Rook at almost all the ages of measurement, but reverse was the case for keel length. 2. The estimates of heritability for the body weights at various ages were more in Red Cornish than that of White Rock. However, all the heritability estimates of body weight, shank length and keel length were, in general, were low suggesting that simple selective breeding will not be much effective for the improvement of these traits. Therefore, the selection may be practiced on some kind of indexes or alternatively non-additive gene interaction effect may be utilized. 3. The selection of smaller chicks at day old stage may be preferred for the genetic improvement in the body weight at 8 weeks of age as the genetic correlation between these traits were negative. 4. The body weights at any of the ages at 2, 4 and 6 weeks may be used as a selection criterion for the genetic improvement of body weights at 8 or 10 weeks of age.
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    ThesisItemOpen Access
    Studies on Genetic and Phenotypic Parameters of lactation in Cross - Bred Dairy Cattle
    (Birsa Agricultural University, Ranchi, 1985) Sonam Tasering Bhutai; Dr. R.S. Pandey
    On the basis of salient striking findings of this study, following conclusions could be drawn. 1. 3/4 to 1/2 HP groups behaved almost similarly for various economic traits which suggested that probably 1/2 exotic inheritance or slightly more than 1/2 was best suited for Indian conditions. 2. Significant effect of period suggested that manage mental conditions of the farm in recent year have slightly improved over the past. 3. It appeared in this study that animals did not attain full biological growth and production potential unless reached in 3rd lactation. This give guide lines to the breeders that on the basis of first and second lactation only, there is considerable risk involved in culling the animals. 4. Prediction of 300 days yield on the basis of first 30 days itself gave almost maximum accuracy in all the genetic groups which is economical too. 5. No generalized criteria could be applied to select animals of different genetic groups on the basis of their part lactation yield. Animals having high exotic inheritance (3/4) and low (3/8 HF) are probably required to be selected on the basis of 90 days part lactation yield where as, those having 1/2 and 5/8 HF level could be quite accurately selected on the basis of their 60 days records itself.
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    ThesisItemOpen Access
    Studies on genetic and phenotypic parameters of some economic traits in different grades ofcross-bred (Friesian X Zebu) Cattle
    (Birsa Agricultural University, Ranchi, 1984) Siya Ram Singh; H. R. Mishra
    Conclusions # On the basis of the findings of this investigation, the following conclusions were drawn – (1) Among Friesian X Sahiwal cross-bred grades, half-breds were superior in respect to body-weights at different ages. (11) Body-weight at 6 months of age can be used as a selection criterion, with considerable accuracy, for higher body-weights at different ages, higher first lactation yield, cumulative milk yields in first three and four lactations and better milk producing efficiency in Friesian X Sahival cross-breds. (111) Half-breds were also superior among all Friesian cross-bred grades, so far as lactation yield; peak yields cumulative milk yields in first four and five lactations; average milk yields per day of lactation length and calving-interval; service period and inter-calving period were concerned. However, cous having 62.5% Friesian inheritance had shortest average age at first calving as well as ary period and highest MPEK and MPEKD values among all Friesian X Sahiwal cross-bred grades under reference. (iv) The results of Multivariate analysis indicated that it cannot be assumed that grading up of Sahival cattle to the total replacement of their genes by those of Friesian origin, will lead to higher level of production.
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    ThesisItemOpen Access
    A Study On Cross Breeding Of Desi With Landrace And Large White Yorkshire Pigs
    (Birsa Agricultural University, Ranchi, 1989) Sharma, Banshidhar; H. R. Misra
    1.Landrace is more suitable for farm owing to its physical conformation and inherent genetic potential of faster growth at the finishing stage, whereas, Large white Yorkshire being more adaptable to rural condition with comparatively high post-weaning shock tolerance capacities stands ahead of the former for distribution in villages where its halfbreds perform better then Landrace halfbreds. 11. A decrease in magnitudes on pre-weaning body weights and linear body measurements with the increase of litter size at birth seemed to be a decisive factor of considerable importance in selection for phenotypic traits. 111. The lower rate of growth just after weaning in almost all the genetic groups suggested need of special care and management at that stage. 1V. Because of high resistance of weaning shock in halfbreds they excel the exotic over preference for any developmental programme in rural areas. If at all, exotics do not merit such consideration until they have crossed the weaning period at least by over one month. V. A significant superiority in litter size, apart from litter weight at birth and at weaning, is an additional advantage in economic traits by crossing of Desi sows with exotic boars over indigenously bred sows with Desi male.