Thumbnail Image

University of Agricultural Sciences, Dharwad

The University of Agricultural Sciences, Dharwad was established on October 1, 1986. The University has 5 Colleges, 27 Research Stations, 6 Agriculture Extension Education Centers, 6 Krishi Vigyan Kendras and ATIC. The University has its jurisdiction over 7 districts namely Bagalkot, Belgaum, Bijapur, Dharwad, Gadag, Haveri, and Uttar Kannada in northern Karnataka. Greater diversity exists in soil types, climate, topography cropping and farming situations. The jurisdiction includes dry-farming to heavy rainfall and irrigated area. Important crops of the region include sorghum, cotton, rice, pulses, chilli, sugarcane, groundnut, sunflower, wheat, safflower etc. The region is also known for many horticultural crops. Considerable progress has been registered in the field of education, research and extension from this University.

Browse

20131
Reset filters
Thesis Type: Ph.D × Subject: Genetics and Plant Breeding × Author: Patil Malagouda × Type: Thesis ×
Reset filters

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    ThesisItemOpen Access
    Molecular mapping and marker association studies in diploid cotton (gossypium spp.)
    (UASD) Patil Malagouda; B. M. Khadi
    Cotton is one of the most important commercial crops grown in India. It is the world’s leading natural fibre crop and is the cornerstone of textile industries worldwide. Inspite of several competitions from synthetic fibres, cotton continues to enjoy a place of prime importance in textile industry. As diploid cottons are well suited to rainfed ecosystem and can fulfil the increasing demand for medium staple nature of fibres, it still necessitates having diploid cottons with improved fibre quality. The present investigation was undertaken to construct the genetic map and to identify QTLs for important yield contributing and fibre quality traits using 50 polymorphic SSR markers in 154 recombinant inbred lines (RILs) derived from the cross between G. herbaceum variety Jayadhar and G. arboreum variety DLSa17. Genetic variability components revealed higher magnitude of variation for most of the traits. This was evidenced by high range and mean performance for different traits in RILs. Per se performance of RILs indicated the improvement over parents for various productivity and fibre quality traits. Association among different traits under study revealed, significant association of seed cotton yield with ginning out turn and lint yield. Fibre length exhibited highly significant positive correlation with fibre strength (0.41) and fibre elongation (0.48). Genetic linkage map was constructed with 50 polymorphic markers. The total map length was 4033.95cM with average distance of 80.68cM between the markers. Out of 15 QTLs detected, seven QTLs were for seed cotton yield. The chromosome 6 harboured QTLs for more than one trait viz., ginning out turn, seed cotton yield, lint yield and uniformity ratio. Three QTLs each corresponding to seed cotton yield, lint yield and uniformity ratio were present between NAU2964 and MUSB1248. The construction of ‘A’ genome diploid map with SSR markers, can serve as a model for the advancement of cotton genetics and genomics. Adding additional markers to the existing map to saturate the map will assist in future map based cloning efforts and fine mapping studies.
  • Thumbnail Image
    ThesisItemOpen Access
    Molecular mapping and marker association studies in diploid cotton (gossypium spp.)
    (UAS Dharwad, 2013) Patil Malagouda; B. M. Khadi
    Cotton is one of the most important commercial crops grown in India. It is the world’s leading natural fibre crop and is the cornerstone of textile industries worldwide. Inspite of several competitions from synthetic fibres, cotton continues to enjoy a place of prime importance in textile industry. As diploid cottons are well suited to rainfed ecosystem and can fulfil the increasing demand for medium staple nature of fibres, it still necessitates having diploid cottons with improved fibre quality. The present investigation was undertaken to construct the genetic map and to identify QTLs for important yield contributing and fibre quality traits using 50 polymorphic SSR markers in 154 recombinant inbred lines (RILs) derived from the cross between G. herbaceum variety Jayadhar and G. arboreum variety DLSa17. Genetic variability components revealed higher magnitude of variation for most of the traits. This was evidenced by high range and mean performance for different traits in RILs. Per se performance of RILs indicated the improvement over parents for various productivity and fibre quality traits. Association among different traits under study revealed, significant association of seed cotton yield with ginning out turn and lint yield. Fibre length exhibited highly significant positive correlation with fibre strength (0.41) and fibre elongation (0.48). Genetic linkage map was constructed with 50 polymorphic markers. The total map length was 4033.95cM with average distance of 80.68cM between the markers. Out of 15 QTLs detected, seven QTLs were for seed cotton yield. The chromosome 6 harboured QTLs for more than one trait viz., ginning out turn, seed cotton yield, lint yield and uniformity ratio. Three QTLs each corresponding to seed cotton yield, lint yield and uniformity ratio were present between NAU2964 and MUSB1248. The construction of ‘A’ genome diploid map with SSR markers, can serve as a model for the advancement of cotton genetics and genomics. Adding additional markers to the existing map to saturate the map will assist in future map based cloning efforts and fine mapping studies.