ASSOCIATION STUDIES IN ELITE SALT TOLERANT LINES UNDER DIRECT SEEDED CONDITIONS IN RICE (Oryza sativa L.)
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Authors
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V PRASANTH
Department of Genetics and Plant Breeding, Agricultural College, Bapatla - 522101 Acharya N. G. Ranga Agricultural University, Lam, Guntur, Andhra Pradesh, India
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T HARITHA
Department of Genetics and Plant Breeding, Agricultural College, Bapatla - 522101 Acharya N. G. Ranga Agricultural University, Lam, Guntur, Andhra Pradesh, India
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M GIRIJA RANI
Department of Genetics and Plant Breeding, Agricultural College, Bapatla - 522101 Acharya N. G. Ranga Agricultural University, Lam, Guntur, Andhra Pradesh, India
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I USHA RANI
Keywords:
Correlation, Direct seeded, Path analysis, Salt toleranceAbstract
In the present study 24 elite salt tolerant lines including two checks developed at ARS
Machilipatnam were evaluated during kharif, 2023 at Agricultural College Farm, Bapatla, Andhra
Pradeshunder direct seeded conditions to test their suitability for direct seeding with EC 2.1
dSm-1, pH 7.2 in a randomized complete block design (RCBD) for association studies. The
correlation studies revealed that early vigour traits like root length at 15 and 30 DAS, shoot
length at 15 and 30 DAS, field emergence at 15 DAS, days to 50 per cent flowering, plant height,
lodging related traits like culm thickness (mm), culm diameter (mm) and yield contributing traits
like panicle length (cm), number of filled grains per panicle, biological yield and harvest index
(%) were positively correlated with grain yield at both phenotypic and genotypic levels suggesting
the simultaneous improvement of all these traits and direct selection of the above traits can
contribute for improvement of grain yield. The path coefficient analysis revealed that at both
phenotypic and genotypic levels, important yield contributing traits like days to 50 per cent flowering,
number of filled grains per panicle, biological yield and harvest index showed not only positive
direct effect but also positive correlation with grain yield suggesting the importance of direct
selection for above traits.
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