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

20121
Reset filters
Thesis Type: M.Sc × Subject: Genetics and Plant Breeding × Start date: 2010 × End date: 2017 × Author: Anilkumar G.S. ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Genetic Analysis of Shoot Fly Resistance and Yield Related Traits in Mas Derived Lines and Their Hybrids in Sorghum
    (UAS, Dharwad, 2012) Anilkumar G.S.; G.M. Sajjanar
    Sorghum is the fifth most important cereal crop. Sorghum hybrids have contributed significantly to increased grain and forage yield in several countries. Among sorghum pests, shoot fly (Atherigona soccata Rondani), a seedling pest is the most important yield constraint in India. Susceptibility of hybrid parents to shoot fly hinder the maximum exploitation of heterosis. Therefore, present investigation was carried out to study heterosis and combining ability using hybrid parents (B & R lines) improved for shoot fly resistance and its component traits through Marker Assisted Breeding. A total of 36 hybrids derived by using 12 parental lines (A, B and R) in a Line x Tester (6 x 6) mating design were evaluated for shoot fly resistance and its component traits, and yield and yield components. The B lines used were derivatives of 20B and R lines were derivatives of R 354 introgressed with shoot fly resistance QTLs. Among the parents, two B line derivatives MAS 1071-1, MAS 1062-1, and two R line derivatives RSF0833 and RSF0815 were showed high level of resistance in terms of reduced deadhearts damage compared to susceptible parents 401B and R 354. The evaluation of the hybrids for per se performance, heterosis and combining ability identified nine promising crosses based on significant heterosis and sca estimates for at least one shoot fly resistance component and grain yield and yield related traits. Three crosses viz., MAS 1076-1 x RSF 0815, 104A x RSF 0810 and 401A x RSF 0815 were recorded significant heterosis and sca effect for grain yield were showing significant heterosis for major components of shoot fly resistance, leaf glossiness and trichome density. Three MAS derived B lines (MAS 1071-1, MAS 1077-1 and MAS 1062-1) and 104B were found to be good combiners for shoot fly resistance in terms of reduced deadhearts damage, and majority of shoot fly resistance component traits. Among R lines, three lines (RSF 0810, RSF 0811and RSF 0833) were found to be good combiners for shoot fly resistance in terms of reduced deadhearts (%) and oviposition (%). With respect to shoot fly resistance component traits, the parent RSF 0833 recorded significant favorable gca effect for all the component traits studied, RSF 0810 and RSF 0820 for all the components except trichome density, and RSF 0811 and RSF 0815 for trichome density only. The heterotic crosses based on 104A were 104A x RSF0810, 104A x RSF0811 and 104A x RSF0820, which were found better than CSH 19R (104A x R354). One heterotic cross based on 401A (401A x RSF 0815) was found promising.