Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810029823
Authors: Swamy N.
Advisor: Dr. B. D. Biradar
Title: GENETIC DIVERSITY ANALYSIS FOR SHOOT FLY TOLERANCE AND PRODUCTIVITY TRAITS IN RABI SORGHUM [Sorghum bicolor (L.) Moench]
Publisher: University of Agricultural Science, Dharwad.
Language: en_US
Type: Thesis
Agrotags: null
Keywords: GENETIC DIVERSITY ANALYSIS FOR SHOOT FLY TOLERANCE AND PRODUCTIVITY TRAITS IN RABI SORGHUM [Sorghum bicolor (L.) Moench]
Abstract: A field experiment was conducted at Regional Agricultural Research Station, Bijapur during rabi season 2013-14, using 122 rabi sorghum genotypes (IS lines, selected B and R lines) to assess the genetic divergence for shoot fly tolerance and productivity traits. Genetic divergence studies revealed that, the days to 50 per cent flowering and trichome density on lower leaf surface contributed maximum to the total divergence. The genotype LG 33 shown high intensity of leaf glossiness (3 grade), high trichome density on lower leaf surface (95.61/mm2) (IS 40245, BL – 13, EP 94, IS 4576, EP 59, IS 40813, IS 40778) and low oviposition percentage (IS 3121, IS 26025, EP 61, BL – 7) by shoot fly can be used in development of tolerant cultivars. The most divergent B lines viz., BL 1, 2, 4, 5, 6, 9, 12, 17, 11, 14 (cluster I) and R lines viz., RL 16, 17,19, 20, 24 (cluster II) can be used to develop new hybrids with enhanced levels of shoot fly tolerance after conversion of B lines in to male sterile lines. Genetic variability studies revealed higher phenotypic and genotypic variance for the characters, oviposition percentage, dead heart percentage, trichome density on both upper and lower leaf surface, stover weight, panicle weight, grain yield and panicle length. High heritability and genetic advance over mean was obtained for the characters viz., trichome density, leaf glossiness, days to 50 per cent flowering, plant height, panicle length, panicle girth, panicle weight, stover weight, grain yield and 1000-grain weight. Hence, selection made through these characters would be effective. Correlation between oviposition and dead heart percentage with traits like leaf glossiness, seedling height and trichome density was highly significant and negative. Grain yield showed positive and significant correlation with all the characters except panicle length.
Subject: Genetics and Plant Breeding
Theme: GENETIC DIVERSITY ANALYSIS FOR SHOOT FLY TOLERANCE AND PRODUCTIVITY TRAITS IN RABI SORGHUM [Sorghum bicolor (L.) Moench]
These Type: M.Sc
Issue Date: 2014-06-01
Appears in Collections:Thesis

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