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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.

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20001
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Subject: Genetics and Plant Breeding × Start date: 2000 × End date: 2009 × Thesis Type: Ph.D × Author: Agrawal, Ajay Prakash ×
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    ThesisItemOpen Access
    GENETIC AND PHYSIO-BIOCHEMICAL ANALYSIS OF POD SHATTERING AND PRODUCTIVITY RELATED TRAITS IN SOYBEAN (Glycine max (L.) Merrill)
    (University of Agricultural Sciences, Dharwad, 2000) Agrawal, Ajay Prakash; Path, S A
    "A collection of 196 germplasm line was evaluated in three seasons for pod shattering as well as productivity. Observations were made on plant growth, pod characters related to shattering and yield attributes. Plant growth and pod characters showed low to moderate genotypic coefficient of variation except pod weight, seed to pod shell ratio, pod shattering and yield attributing traits. Habitability and genetic advance was high for all the traits except days to maturity, seeds per pod, pod length and pod width. Characters contributing towards pod shattering resistance were pod weight, pod length and pod thickness. Following Mahalanobis analysis, shattering resistant genotypes identified were grouped in five clusters, of which EC-14396, CGP-268 and GP-2340-A were also promising for seed yield. A diallel set of crosses was made using five genotypes representing the variation in pod shattering. Yield attributing traits were under the control of both additive and non-additive gene action. Plant growth and pod characters along with pod shattering were governed by additive gene action except for degree of indeterminate growth habit, seeds per pod, pod width and pod shell thickness. Pod shattering susceptibility was partially dominant over resistance and the data indicated the possibility of developing shattering resistant genotypes by crossing resistant parents. Physiological parameters related to pod development indicated that growth rate and dry matter accumulation in pod and seed were negatively correlated with pod shattering. However, pod shell growth rate was positively correlated with pod shattering. Assay of four cell wall degrading enzymes in shattering and nonshattering zones of resistant and susceptible varieties indicated that cellulase play an important role in pod shattering process. The action of polygalactouranase was opposite to cellulase, but did not exhibit clear involvement. Peroxidase and polyphenol oxidase did not show any trend in either the pod shattering resistant or susceptible genotypes. The study was able to identify Bragg x JS-335 as potential combination worth handling for developing pod shattering resislant as well as high yielding genotypes."