Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810040442
Authors: JAN, NUSRAT
Advisor: Lal, Eugenia P.
Title: Evaluation and Characterization of Rice (Oryza sativa L.) Genotypes for Seed Vigour, Yield, Quality and Component Traits Under Temperate Conditions of Kashmir
Publisher: Department of Biological Sciences Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad, U.P., India-211007
Language: en
Type: Thesis
Pages: 315P.
Agrotags: null
Keywords: Key words: - Seed vigour, grain, yield, gel consistency, alkali spreading value, amylose, variability, heritability, correlation, path, Oryza sativa L.
Abstract: The present study “Evaluation and characterization of rice (Oryza sativa L.) genotypes for seed vigour, yield, quality and component traits under temperate conditions of Kashmir” was carried out in the division of Plant Breeding and Genetics of Mountain Research Centre for Field Crops, SKUAST- K, Khudwani, Anantnag, Kashmir to assess the variability, heritability, genetic advance, correlation and path-coefficient analysis for seed and seed vigour traits, yield contributing traits and physio-chemical and cooking quality traits of 35 rice genotypes including two checks. On the basis of mean performance the maximum seed vigour index was recorded in check SR-1 followed by CH-988 and K-1313-51-3 and lowest value of seed vigour index was recorded in Pusa Sugandha-5. Highest grain yield per hill was observed in K-1313-51-3 followed byVL-DHAN-4932 and VL-DHAN-7314 and lowest value of grain yield per hill was recorded in Pusa Sugandha-3. In case of amylose content highest value was observed in K-1313-24-3 followed by CH-1007, SKAU-292 and the lowest value of amylose content was observed in SKAU-420. The magnitude of PCV (phenotypic coefficient of variation) was higher than the corresponding GCV (genotypic coefficient of variation) for seed and seed vigour traits, agro-morphological and physio-chemical and cooking quality traits. Higher estimates of broad sense heritability (h2) for seed and seed vigor traits was recorded in seedling dry weight (mg), seedling fresh weight (mg), shoot length (mm), root length (mm), and seedling length (mm). Whereas, high estimates of broad sense heritability (h2) for agro-morphological traits was observed in number of filled grains per panicle, number of spikelets per panicle and biological yield per hill (g) and medium to low estimates of broad sense heritability (h2) was observed in number of productive tillers per hill, flag leaf width (cm) and flag leaf area (cm²). Among physio-chemical and cooking quality traits amylose content (%) and head rice recovery showed high estimates of broad sense heritability (h2) (more than 60%) followed by milling and gel consistency. While as water uptake ratio and kernel widening ratio showed moderate broad sense heritability. High estimates of genetic advance was observed in seed vigour index in case of seed and seed Ph.D. Thesis Page 20 vigour traits, biological yield per hill (g) in agro-morphological traits and elongation percentage in physio-chemical and cooking quality traits. High estimates of genetic advance as (%) mean was observed in seedling fresh weight (g), harvest index (%) and gel consistency. Seed breadth (mm), flag leaf width and kernel widening ratio showed low estimates of genetic advance. Seedling length (mm), shoot length (mm), germination (%), root length (mm), seed breadth (mm) and 1000 seed weight (g) showed significant and positive association with seed vigour index. While as L/B ratio and seed length (mm) showed significant but negative association with seed vigor index at both genotypic and phenotypic level. Harvest index, plant height (cm) and flag leaf area (cm²) showed significant and positive association with grain yield per hill. While as days to 50% flowering and days to maturity showed significant negative association with grain yield per hill at both genotypic and phenotypic level. The genotypic and phenotypic correlation coefficient revealed that amylose content showed significant positive correlation with volume expansion ratio, kernel breadth after cooking (mm), kernel breadth before cooking (mm) at genotypic and phenotypic level and water uptake ratio at genotypic level only. While as amylose content showed significant negative association with kernel length after cooking(mm), hulling (%),milling (%), at genotypic and phenotypic level. While as kernel widening ratio, kernel length before cooking (mm), elongation ratio and elongation (%) at genotypic level only. Seedling length (mm) and germination (%) showed highest direct positive effect on seed vigour index at both genotypic and phenotypic level. While as L/B ratio and seed breadth showed highly negative direct effect on seed vigour index at genotypic level. Whereas, seed length and seedling fresh weight (mg) showed highest negative direct effect on seed vigour index at phenotypic level. The genotypic and phenotypic path coefficient revealed that flag leaf length (cm) showed highest direct positive effect on grain yield per hill. While as days to maturity showed highest negative direct effect on grain yield per hill followed by flag leaf area (cm²) and number of productive tillers per hill at genotypic level. Flag leaf area (cm²) showed highest direct positive effect on grain yield per hill. While as days to maturity showed highest negative direct effect on grain yield per hill followed by flag leaf width (cm), number of productive tillers per hill at phenotypic level. Genotypic and phenotypic path coefficient analysis revealed that elongation (%) showed highest direct positive Ph.D. Thesis Page 21 effect on amylose content (%). While as elongation ratio showed direct negative effect on amylose content at genotypic level. Elongation ratio showed the highest direct positive effect on amylose content (%). While as elongation (%) showed direct negative effect on amylose content at phenotypic level. On the basis of cooking quality analysis genotypes K-1313-24-3 and K-1313-51-3 are found best in terms of desirable cooking quality traits along with good grain yield and hence are expected to be preferred by consumers.
Description: Ph.d. thesis
Subject: Botany
Theme: Evaluation and Characterization of Rice (Oryza sativa L.) Genotypes for Seed Vigour, Yield, Quality and Component Traits Under Temperate Conditions of Kashmir
Research Problem: Evaluation and Characterization of Rice (Oryza sativa L.) Genotypes for Seed Vigour, Yield, Quality and Component Traits Under Temperate Conditions of Kashmir
These Type: Ph.D
Issue Date: 2018
Appears in Collections:Thesis

Files in This Item:
File Description SizeFormat 
PDF THESIS.pdf8.32 MBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.