Thumbnail Image

Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur

Browse

20132
Reset filters
Subject: Plant Breeding and Genetics × Author: Vanshkar, Preeti × Start date: 2000 × Type: Thesis × Thesis Type: M.Sc ×
Reset filters

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    ThesisItemOpen Access
    Genetics Studies of Recombinant Inbred Lines Derived From JNPT 101*25B for Yield and Quality Attributes in Rice (Oryza sativa L.)
    (JNKVV, 2013) Vanshkar, Preeti; Rao, S.K.
    ABSTRACT he present investigation entitled “Genetics of RECOMBINANT INBRED LINES derived from JNPT 101 X 25 B for yield and quality attributes in Rice (Oryza sativa L.) carried out on recombinant inbred lines at Seed Breeding Farm of J.N.K.V.V, Jabalpur with these genotypes in Randomized Complete Block Design with three replications during Kharif 2011-12. Observations were recorded on the basis of ten random competitive plants selected from each RILs in every replication for morphological traits e.g. days to fifty percent flowering, days to maturity, number of leaves, number of tillers per plant, number of productive tillers plant-1, plant height, inter nodal distance, flag leaf width, panicle length, panicle weight, average panicle weight, number of spikelets, number of filled spikelets, number of unfilled spikelets, spikelet fertility %,spikelet sterility %,1000 grain weight, grain yield plant-1, biological yield plant-1 , panicle index, harvest index, grain length, grain breadth, length breadth ratio, hulling%, milling % and head rice recovery %. were evaluated as per standard procedure. The mean data estimated were subjected to analysis of variance as per the Randomized Block Design. Analysis of data revealed highly significant difference among genotypes for all traits. GCV and PCV were comparatively high for spikelet sterility % followed by number of unfilled spikelets, number of filled spikelets, number of spikelets, average panicle weight, biological yield plant-1, panicle weight, grain yield plant-1, number of productive tillers plant-1, number of tillers plant-1, 1000 grain weight, flag leaf length, harvest index%, seed width, leaf width, head rice recovery %, milling %, number of leaves, grain breadth ratio, hulling %, flag leaf width , days to fifty percent flowering, while, moderate variation were observed for days to maturity, plant height, inter nodal distance, panicle length, panicle index, grain length, whereas, low genotypic and phenotypic coefficient of variations was observed for spikelet fertility %. Heritability in broad sense estimates revealed were highest for days to maturity followed by very high estimate, 1000 grain weight, inter nodal distance, milling%, hulling%, head rice recovery %, grain breadth ratio, number of leaves, spikelet fertility%, number of productive tillers and days to fifty percent flowering. The estimates of heritability were moderate for number of tillers, length breadth ratio. Low heritability was recorded for harvest index, panicle length, spikelet sterility %, biological yield plant-1, panicle index, grain yield plant-1, plant height, number of spikelets, average panicle weight. The estimate of genetic advance as percentage of mean at five percent selection intensity was highest for number of unfilled spikelets followed by number of filled spikelets, biological yield plant-1, spikelet sterility %,average panicle weight, number of spikelets, harvest index%, panicle weight, while, moderate genetic advance was estimated for grain yield plant-1, number of productive tillers plant-1, 1000 grain weight, head rice recovery%, milling %, hulling %, and flag leaf width, However, low genetic advance as percentage of mean was estimated for length breadth ratio. High heritability accompanied by high genetic advance indicated the predominance of additive gene action for the traits number of leaves, number of productive tillers, number of unfilled spikelets, 1000 grain weight, milling %, hulling % and head rice recovery %. Selection can be effective on the basis of correlation and path analysis for the characters viz., number of productive tillers, 1000 grain weight, milling%, spikelet fertility %, grain length, biological yield plant-1, panicle weight, average panicle weight, number of spikelet, number of filled spikelet and number of tillers. With respect to findings of the present investigation, recombinant inbred lines viz., 54, 51, 33, 36, 21 were identified as superior lines with respect to morphological and grain quality traits.
  • Thumbnail Image
    ThesisItemOpen Access
    Genetics Studies of Recombinant Inbred Lines Derived From JNPT 101*25B for Yield and Quality Attributes in Rice (Oryza sativa L.)
    (JNKVV, 2013) Vanshkar, Preeti; Rao, S.K.
    ABSTRACT he present investigation entitled “Genetics of RECOMBINANT INBRED LINES derived from JNPT 101 X 25 B for yield and quality attributes in Rice (Oryza sativa L.) carried out on recombinant inbred lines at Seed Breeding Farm of J.N.K.V.V, Jabalpur with these genotypes in Randomized Complete Block Design with three replications during Kharif 2011-12. Observations were recorded on the basis of ten random competitive plants selected from each RILs in every replication for morphological traits e.g. days to fifty percent flowering, days to maturity, number of leaves, number of tillers per plant, number of productive tillers plant-1, plant height, inter nodal distance, flag leaf width, panicle length, panicle weight, average panicle weight, number of spikelets, number of filled spikelets, number of unfilled spikelets, spikelet fertility %,spikelet sterility %,1000 grain weight, grain yield plant-1, biological yield plant-1 , panicle index, harvest index, grain length, grain breadth, length breadth ratio, hulling%, milling % and head rice recovery %. were evaluated as per standard procedure. The mean data estimated were subjected to analysis of variance as per the Randomized Block Design. Analysis of data revealed highly significant difference among genotypes for all traits. GCV and PCV were comparatively high for spikelet sterility % followed by number of unfilled spikelets, number of filled spikelets, number of spikelets, average panicle weight, biological yield plant-1, panicle weight, grain yield plant-1, number of productive tillers plant-1, number of tillers plant-1, 1000 grain weight, flag leaf length, harvest index%, seed width, leaf width, head rice recovery %, milling %, number of leaves, grain breadth ratio, hulling %, flag leaf width , days to fifty percent flowering, while, moderate variation were observed for days to maturity, plant height, inter nodal distance, panicle length, panicle index, grain length, whereas, low genotypic and phenotypic coefficient of variations was observed for spikelet fertility %. Heritability in broad sense estimates revealed were highest for days to maturity followed by very high estimate, 1000 grain weight, inter nodal distance, milling%, hulling%, head rice recovery %, grain breadth ratio, number of leaves, spikelet fertility%, number of productive tillers and days to fifty percent flowering. The estimates of heritability were moderate for number of tillers, length breadth ratio. Low heritability was recorded for harvest index, panicle length, spikelet sterility %, biological yield plant-1, panicle index, grain yield plant-1, plant height, number of spikelets, average panicle weight. The estimate of genetic advance as percentage of mean at five percent selection intensity was highest for number of unfilled spikelets followed by number of filled spikelets, biological yield plant-1, spikelet sterility %,average panicle weight, number of spikelets, harvest index%, panicle weight, while, moderate genetic advance was estimated for grain yield plant-1, number of productive tillers plant-1, 1000 grain weight, head rice recovery%, milling %, hulling %, and flag leaf width, However, low genetic advance as percentage of mean was estimated for length breadth ratio. High heritability accompanied by high genetic advance indicated the predominance of additive gene action for the traits number of leaves, number of productive tillers, number of unfilled spikelets, 1000 grain weight, milling %, hulling % and head rice recovery %. Selection can be effective on the basis of correlation and path analysis for the characters viz., number of productive tillers, 1000 grain weight, milling%, spikelet fertility %, grain length, biological yield plant-1, panicle weight, average panicle weight, number of spikelet, number of filled spikelet and number of tillers. With respect to findings of the present investigation, recombinant inbred lines viz., 54, 51, 33, 36, 21 were identified as superior lines with respect to morphological and grain quality traits.