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20092
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Subject: Seed Science and Technology × End date: 2009 × Start date: 2009 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    influence of planting ratios, staggered planting and seed polymer coating on seed yield, quality and storability in RSFH-130 sunflower hybrid
    (UAS Dharwad, 2009) N.M.Shakuntala; B.S.Vyakaranahal
    Field and laboratory experiments were carried out at MARS, UAS, Raichur to study the influence of planting ratios and staggered planting of male (R-630) and female (CMS-104A) parental lines during rabi 2007 and 2008 on seed yield and quality in RSFH-130 sunflower hybrid during kharif 2007 and 2008. The female parent was late in days to 50% flowering by 5 to 6 days than male parent. The hybrid seed yield per ha and seed weight per plant were high when male parent was sown six days late to female parent. The lower seed yield per ha with simultaneous sowing and seed weight per plant with nine days late sowing of pollen parent were observed. Sowing of pollen parent three days and six days later to seed parent resulted in higher 100-seed weight, kernel weight, volume weight, dry weight and germination as compared to simultaneous sowing and nine days later sowing of pollen parent to seed parent The 100-seed weight, seed filling percentage, seed weight per plant and seed yield per ha were found to be significantly higher in 5:3 and 3:1 (female to male) compared to 7:2 and 4:1 planting ratios. Effect of seed polymer coating with chemicals on growth, yield and storability in sunflower hybrid RSFH-130 (Experiment-II and III) consisted of eight seed treatments with three replications. Significantly higher seed weight per plant and seed yield per ha were obtained in seeds treated with polymer seed coating @ 5g per kg of seeds + vitavax @ 2 g per kg of seeds + imidachloprid @ 5 g per kg of seeds (T8) as compared to other treatments and untreated control (T1). Seed quality parameters during storage showed significantly highest in treatment T8 and lowest in T1 in both the containers. Seeds stored in polythene bag performed better than cloth bag.
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    ThesisItemOpen Access
    Seed technological studies in chickpea (Cicer arietinum L.)
    (UAS Dharwad, 2009) B.Gnynadev; M.B.Kurdikeri
    Field and laboratory experiments were conducted at the Main Agricultural Research Station, Dharwad and in the laboratory of Department of Seed Science and Technology, University of Agricultural Sciences, Dharwad during rabi 2007-08 and 2008-09. Nipping at 30 DAS and growth regulator foliar spray in A-1 and ICCV-2 chickpea varieties revealed that over of nipping and growth regulators, A-1 recorded more number of branches and pods per plant with higher seed yield and better seed quality parameters compared to ICCV-2. Nipping showed beneficial influence on number of branches and pods per plant with higher seed yield (28.50 q/ha) and better seed quality. Among growth regulators, NAA (50 ppm) followed by Tricontanol (0.1%) resulted in more number of branches and pods per plant with higher seed yield (29.91 and 27.80, respectively) with better seed quality parameters. The interaction effect of varieties, nipping and growth regulators also showed similar beneficial influence on seed yield and quality. The field study on seed size grades on seed yield and quality in five chickpea varieties revealed that big and medium seeds produced more seed yield (33.11 and 32.05 kg/ha, respectively) with better seed quality parameters compared to small seeds. Seed yield and quality were more in Desi over Kabuli chickpea varieties. The interaction effect showed that big seeds of Desi and Kabuli types were better in seed yield and quality compared to small seeds. The storage study indicated that Desi varieties maintained satisfactory germination upto 8-9 months while Kabuli types upto 7-8 months. Among seed size, small and medium seeds were relatively more in storage potential that other seed grades. In all the chickpea varieties, 100 seed weight and moisture content decreased significantly with advance in maturity, while, germination and vigour index increased. Seeds harvested at full yellow pod colour stage (H3) recorded higher germination (96.40%) and seed vigour. The morphological characters viz., stem colour, pigmentation, foliage colour, pod colour, seed coat colour, test weight etc. were found more reliable parameters for varietal characterization in chickpea varieties.