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Phenotyping and correlation studies of recombinant inbred lines derived from interspecific cross of Oryza sativa and Oryza nivara

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Title Phenotyping and correlation studies of recombinant inbred lines derived from interspecific cross of Oryza sativa and Oryza nivara
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Creator De Silva N.P.S, Divya Balakrishnan, V.G.Shankar, B.Kavitha, A.K.Raju, P.Prashanthi, Y.Poli, D.Subramanyam, N.Sarla
 
Subject Rice, yield, grain shape, correlation coefficient, recombinant inbred lines
 
Description Not Available
Recombinant Inbred Lines (RILs) derived from crosses between elite cultivars and wild introgression lines
are important sources of new genetic variability. In this study 177 RILs derived from a cross of Swarna /
166s (Swarna /Oryza nivara), were characterized for yield and grain shape related traits for two seasons
Rabi 2018-19 and Kharif 2019. Phenotypic correlation analysis showed that, single plant yield had a positive
association with productive tiller number, total tiller number, panicle weight, biomass and harvest index in
both the seasons. Significant and positive correlation was observed between grain length and grain perimeter
followed by productive tiller number and total tiller number. A perfect negative linear relationship was
observed between filled grain percentage and unfilled grain percentage. Across the seasons, biomass weight
consistently showed significant positive correlations with the majority of yield contributing traits, followed
by days to 50 percent flowering. Grain shape traits (grain length, grain width, length/width ratio, grain area
and grain perimeter) were interrelated with each other significantly. Trait association study in this mapping
population showed that though the yield performance has always been the main focus of breeding programmes,
the complex interaction of the yield attributes is also equally significant to understand the genetic mechanisms
for yield improvement. Selected RILs from this study are being used in rice improvement programmes to
detect favorable genes from O. nivara for yield improvement.
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Date 2024-06-11T14:29:05Z
2024-06-11T14:29:05Z
1001-12-01
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/83548
 
Language English
 
Relation Not Available;
 
Publisher Not Available