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Advisor: J. R. DIWAN
Language: en
Type: Thesis
Agrotags: null
Abstract: Genetic diversity is pre-requisite for any crop improvement programme as it helps in the development of superior recombinants. In the present study the nature and magnitude of genetic diversity, Micronutrients (Zinc and Iron), Protein and Nitrogen Use Efficiency (NUE) was assessed among 60 rice genotypes for 27 quantitative characters. From the experimental results it was observed that Supreme sona recorded to be the best performer for seed yield with good harvest index followed by Siri-1253 and MTU 1010. On the basis of Mahalanobis D2 statistics the genotypes were grouped into six clusters. The geographical diversity has not been found related to genetic diversity. The days to 50 % flowering, 1000 grain weight, plant height, number of seeds per panicle, number of panicles per plant and leaf length and width cumulatively contribute 99.15 % of total divergence. The highest intra-cluster distance was recorded for cluster-IV (Meese bhatta, Navaara, Kari jiddu, Sanna nellu, Raja bhoga, Delhli sanna and Supreme sona). The highest inter cluster distance was observed between cluster II (Gham sale, Kyasakki and Ambe mohar) and VI (Surgeon), therefore the genotypes from these clusters may be used in future hybridization programme. The malnutrition and micronutrient deficiency causes several problems in developmental stages of children. This can be neutralized by the identification, characterization and mapping of local land races for various quality traits and micronutrient content can be exploited in developing new genotypes with enhanced quality traits. The maximum iron, zinc, protein and nitrogen content were observed in ADT-43, Meese batta, HMT, Parimala sanna and Sarjan, Gangavati sanna, Barma black, Navar and NMS. Nitrogen is the most essential element in determining the yield potential of agricultural system. Additional doses of nitrogen are usually applied to increase grain yield. Nitrogen fertilizers are not used efficiently because rice is grown in an environment that is conducive to nitrogen losses through de nitrification, ammonia volatilization, runoff and leaching. The high nitrogen use efficiency was observed in Supreme sona, Mugada sugandh, Madras sanna, Mysore mallige, Delhi sanna, Kage sali and K-108. Hence ADT-43 showed good performance among all genotypes hence these can be used as parent for improvement for high Nitrogen in further breeding programmes.
Subject: Genetics and Plant Breeding
These Type: M.Sc
Issue Date: 2012-07-30
Appears in Collections:Thesis

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