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EVALUATION OF RICE (Oryza sativa L.) VARIETIES AND HYBRIDS TO SYSTEM OF RICE INTENSIFICATION (SRI) METHOD OF CULTIVATION AND ITS EFFECT ON YIELD AND QUALITY PARAMETERS

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Title EVALUATION OF RICE (Oryza sativa L.) VARIETIES AND HYBRIDS TO SYSTEM OF RICE INTENSIFICATION (SRI) METHOD OF CULTIVATION AND ITS EFFECT ON YIELD AND QUALITY PARAMETERS
 
Creator VEERABHADRAM, G
 
Contributor SESHAGIRI RAO, A
 
Subject developmental stages, rice, planting, yields, grain, productivity, vegetative propagation, irrigation, hybrids, genotypes
 
Description Studies on System of Rice Intensification (SRI) for seed yield and quality were
taken up with four hybrids and eleven varieties in both field and laboratory. Field
studies were conducted at ICRISAT DRR Farm, Patancheru, Hyderabad, while
laboratory studies were carried out at Department of Genetics and Plant Breeding,
Directorate of Rice Research, Rajendranagar, Hyderabad during kharif 2009. The field
experiment was laid out in Randomized Block Design with three replications with
spacing 25 x 25 cm (SRI method) and 15 genotypes with different duration groups as
treatments. Data was recorded on growth, yield attributing characters, and grain quality
characters. The mean and range were calculated for yield and yield components and
grain quality characters. Path coefficient analysis was used to partition the phenotypic
and genotypic correlation coefficient into direct and indirect effects for yield and yield
components.
The analysis of variance showed significant differences for the characters total
tillers per plant, ear bearing tillers per plant, plant height, days to 50 per cent flowering,
root density, dry matter production, panicle per plant, filled grains per panicle, 1000
grain weight and grain yield per plant. The character panicle length showed non
significant difference.
The positive correlation of ear bearing tillers with panicle length and root
density with filled grains per panicle, dry matter production and ear bearing tillers, dry
matter production with plant height and filled grains per panicle indicates the
importance of characters for selection under SRI cultivation. Therefore, these characters
are to be involved in getting higher yields.
The results suggest that ear bearing tillers; root density, dry matter production and
filled grains per panicle are important characters to consider for improvement of grain
yield under SRI cultivation.
The path coefficient analysis revealed that ear bearing tillers per plant, root
density, dry matter production and panicle length exhibited high positive direct effect on
grain yield. Indirectly root density, filled grains per panicle, plant height, panicle length
and 1000 grain weight contributed for ear bearing tillers per plant.
In the present investigation, the medium duration rice hybrids (KRH-2, PA6201)
gave highest grain yield associated with more number of ear bearing tillers, high root
density, dry matter production and filled grains per panicle. The character association
and direct and indirect effects under SRI reveals the importance of characters ear
bearing tillers, root density, dry matter production and filled grains per panicle in
selecting rice genotypes suitable for SRI method.
Realization of higher yields under SRI method with less external inputs
particularly water is evident. Though all Rice genotypes (Varieties / Hybrids) were
responded well under SRI but identification of varieties or hybrids having high tillering
ability, dense root system, high total dry matter production and lengthy panicles with
more number of filled grains will enhance the yield potential of the system.
The genotypes differ in their performance for grain quality characters under SRI
but similar trend of performance was observed under irrigated situation also and
therefore no conclusion can be drawn from the study about the enhancement of grain
quality characters under SRI. It needs further studies for confirmation
 
Date 2016-06-16T14:56:23Z
2016-06-16T14:56:23Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67469
 
Language en
 
Relation D9328;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY