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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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Thesis Type: M.Sc × Subject: Seed Science and Technology × Start date: 2010 × End date: 2018 × Author: BAGEWADI, SUCHITA M. ×
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    ThesisItemOpen Access
    STUDIES ON FLORAL TRAITS AND SEED PRODUCTION TECHNIQUES OF KARNATAKA RICE HYBRID-4
    (University of Agricultural Sciences, Dharwad, 2015-04) BAGEWADI, SUCHITA M.; DESHPANDE, V. K.
    An investigation entitled “Studies on floral traits and seed production techniques of Karanataka Rice Hybrid-4” was carried out with two field experiments. Seven CMS lines and restorer line with hybrid combinations were evaluated for their floral traits and flowering behaviour. CMS lines IR-68897A (16.250), COMS-23A (34.35 cm), CRMS-32A (32.350) IR- 79156A (79.09%) and IR-79156A (30.33 cm) showed higher mean value for flag leaf angle, flag leaf length, angle of glume opening, panicle exsertion and length of panicle. While CB174R (102.45 cm), CB817R (15.490) and KMR-3 (25.43 cm) restorer lines were better in exhibition of plant height, angle of glume opening and length of panicle. Among these COMS- 23A x CB174R followed by CRMS-32A x MSN-36R shown best performance for seed set in upland ecosystem. To enhance seed setting different seed production techniques were imposed on hybrid seed production of KRH-4. Planting ratio of 4:2 recorded the highest seed set (30.88%) and seed yield (24.77q ) with spraying GA3 + rope pulling followed by GA3 + Flag leaf clipping. The highest F1 seed yield (24.77q/ha) of KRH-4 was obtained with an application of GA3 @ 60 g/ha + rope pulling which enhanced the maximum number of effective tillers, the highest number of grains/panicle, panicle exsertion rate and outcrossing rate. The untreated control produced lowest seed yield (8.72q/ha) was produced without application of GA3 i.e., control. The row ratio of 6:2 and 8:2 produced the highest (20.68 q/ha) and the lowest (18.16q/ha) F1 seed yield, respectively. The interaction between GA3 and row ratio of restorer and CMS lines was significant for F1 seed yield. The highest F1 seed yield (25.76q/ha) was obtained with the application of GA3 @ 60 g/ha at the row ratio of 6:2 (A: R). The lowest seed yield (4.60q/ha) was recorded without any seed production techniques (control) at row ratios of 8:2.