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Thesis

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Subject: Animal Genetics and Breeding × Start date: 1990 ×
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Now showing 1 - 5 of 5
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    Genetic Divergence vis-à-vis Performance of Holstein Friesian Crossbred Cattle From Different Countries
    (College of Veterinary Science, Punjab Agricultural University, Ludhiana, 2005) Kaur, Simarjeet; OS, Parmar
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    ThesisItemOpen Access
    Quantitative genetic analysis of some linear external body measurements in white leghorn
    (Department of Animal Science PAU, Ludhiana, 1992) Singh, Amardeep; Lalm, Moti
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    ThesisItemOpen Access
    Genetics of body composition and its relationship with body weight in Broilers
    (Department of Animal Science PAU, Ludhiana, 1990) Singh, Ranjit; Trehan, P. X
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    EVALUATION OF DIFFERENT BREEDING PROVISIONS FOR THEIR ACCEPTANCE BY BIRDS
    (Punjab Agricultural University, 2010) Gupta, Saloni; Dhanju, C. K.
    To understand the impact of diminished/altered habitat of birds due to deforestation in agroecosystem of Punjab, the occurrence and abundance of birds was studied in dense tree cover area and evaluation of different breeding provisions for their acceptance by birds was carried out. Total count of birds recorded from June 2009-May 2010 was 1927 including 19 bird species. The number being higher (302) in August and lower (35) in December and higher in evening than morning. Common Myna was dominant species in this area. Species richness was maximum (16) in August and minimum (8) in October and January. Species diversity and evenness also varied throughout the year in this area. The open nests were not found in dense tree cover area of Japanese garden but five nest holes occupied by Rose Ringed Parakeet were recorded in February, March and April on Dhek and Silver oak. Out of the three breeding provisions; wooden boxes, earthen pots with/without tunnel in set of ten installed on different trees in dense tree cover area, only the wooden boxes installed at the height of 10-14 ft were accepted by Common Myna, Magpie Robin and Spotted Owlet. Out of ten boxes, five were occupied by Common Myna in each of breeding seasons i.e. June to September and February to May while only one box each, was occupied by Magpie Robin and Spotted Owlet. The breeding success was 93.1% in case of Common Myna with normal clutch size and breeding behaviour. Key Words: Birds, Community structure, Natural nesting and breeding provisions.
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    Genetic analysis for forage and quality traits in cowpea [Vigna unguiculata (L.) Walp.
    (Punjab Agricultural University, Ludhiana, 2014) Maan, Chamkor Singh; Devinder Pal Singh
    Cowpea is a warm season, quick growing, single cut, highly nutritious legume. Cowpea is mainly grown for fodder starting from March to July. Due to its fast growing nature, it supplies nutritious and palatable fodder during kharif when there is scarcity of green fodder. The experimental material comprised of 9 parental lines and their 36 crosses in half diallel fashion were evaluated. The estimate of variances due to combining ability showed that the general combining ability variances were higher for the characters like stem girth, leaf:stem ratio, days to flowering, leaf length, leaf breadth, number of leaves per plant, number of branches per plant, green fodder yield per plot, detergent fibre contents which indicated the predominance of additive type of gene effects for these traits whereas variances due to specific combining ability effects were higher for vine length, cowpea mosaic virus, dry matter yield per plot, crude protein content and in vitro dry matter digestibility indicating the predominance of non-additive type of gene effects for these traits. The parent 85-5E was found to be the best general combiner for both green fodder and dry matter yields. The crosses FOS 1 x CL 398 and CL 391 x C 88 were the best specific combiner for green fodder and dry matter yields, respectively. Heterosis breeding offered considerable scope for improving forage and dry matter yields, their components and various quality traits in cowpea as indicated by experimental results of the present invetigation. The cross combination CL 398 x C 88 showed positive significant heterobeltosis for both green fodder yield and dry matter content. The genetiic diversity analysis among ten parental lines revealed that all the genotypes showed more than 70% similarity for all the 41 SSR markers used for the present investigation. The highest value of similarity coeffifient (0.92) was detected between genotypes CL 401 and FOS 1 which indicated the less divergence whereas the lowest value of similarity coefficient was evident between 85-5E and CL 367 indicating more divergence. The analysis revealed narrow genetic base among genotypes used in the study.