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GENETIC ASSESSMENT FOR YIELD AND QUALITY COMPONENTS UNDER ORGANIC AND CONVENTIONAL FERTILIZER MANAGEMENTS IN RICE (Oryza sativa L.)

KrishiKosh

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Title GENETIC ASSESSMENT FOR YIELD AND QUALITY COMPONENTS UNDER ORGANIC AND CONVENTIONAL FERTILIZER MANAGEMENTS IN RICE (Oryza sativa L.)
 
Creator RAMA DEVI, C
 
Contributor MOHAN REDDY, D
 
Subject grain, yields, planting, developmental stages, rice, genotypes, genetics, harvesting, harvest index, fertilizers
 
Description The present investigation was conducted at wetland farm of S.V. Agricultural College, Tirupati during late rabi 2011 to study the variability and genetic parameters, character association and path analysis in thirty two genotypes of rice under organic and conventional fertilizer managements separately.
Analysis of variance carried out in respect of fourteen quantitative characters revealed highly significant differences among the genotypes for all the characters under both organic and conventional fertilizer managements, indicating the presence of considerable amount of genetic variation for different traits in the present material. Based on mean performance studies for all the characters, the genotypes Bhadraj, TN-1, Plutikambani, Dular, ADT-43, Velluthachera, PR-106, NLR-145, TKM-6, MTU-1061, MTU-9993, MTU-2077, Triguna and MTU-1001 were found to be good for yield as well as for quality improvement under organic and conventional fertilizer managements. High GCV, PCV, heritability and genetic advance as per cent of mean were recorded for number of grains per panicle, grain yield per plant, number of effective tillers per plant, harvest index and plant height suggesting preponderance of additive gene action in the expression of these characters under both organic as well as conventional fertilizer managements. Hence, direct selection for these traits would result in further improvement of yield under these two management systems.
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The association analysis in both the fertilizer managements indicated significant positive association of number of grains per panicle, harvest index, panicle length, days to 50 % flowering and days to maturity with grain yield per plant, indicating the possibility for simultaneous selection of these characters towards the improvement of grain yield.
Path analysis revealed high positive direct effects of days to 50 % flowering, number of grains per panicle and harvest index on grain yield under organic fertilizer management. Whereas, under conventional fertilizer management days to maturity and harvest index displayed high positive direct effect on grain yield per plant. Therefore, the characters viz., days to 50 % flowering, number of grains per panicle and harvest index under organic fertilizer management, while days to maturity and harvest index under conventional fertilizer management could be emphasized as important traits. Hence selection would be more effective through these traits to improve grain yield under respective environments.
 
Date 2016-06-17T10:23:19Z
2016-06-17T10:23:19Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67501
 
Language en
 
Relation D9358;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY