volume 28 issue 3 (september 2005) : 189 - 193
VARIABILITY AND CORRELATION STUDIES FOR QUANTITATIVE TRAITS IN SPANISH BUNCH GROUNDNUT (ARACHIS HYPOGAEA L.) GENOTYPES
1Regional Agricultural Research Station,
Tirupati - 517502, Andhra Pradesh. India
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Legume Research
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volume 28 issue 3 (september 2005) : 189 - 193
VARIABILITY AND CORRELATION STUDIES FOR QUANTITATIVE TRAITS IN SPANISH BUNCH GROUNDNUT (ARACHIS HYPOGAEA L.) GENOTYPES
1Regional Agricultural Research Station,
Tirupati - 517502, Andhra Pradesh. India
ABSTRACT
Groundnut is an important oil seed crop grown in Andhra Pradesh and India during khanf (rainfed) and post rainy (rabi-summer) seasons. Study of variability and correlation among yield and yield component traits and stem necrosis disease would help in selection of high yielding varieties with stem necrosis disease resistance. Twenty two genotypes were sown in randomized block design with three replications during rabi 2000–01. High genotypic and phenotypic variation was observed for final plant stand (730.40 and 1059.80), 100 pod weight (41.18 and 76.60). High genotypic and phenotypic coefficients of variation were recorded for pod yield per plant (23.06% and 33.20%) and plant stand maintained at harvest (22.75% and 27.41%). It indicates the presence of considerable amount of genetic variability for these characters. High heritability was observed for 100 pod weight (73.33%), plant stand maintained at harvest (68.92%) and PSND (63.61%). High genetic advance as percentage of mean was observed for plant stand maintained at harvest (38.91%), pod yield per plant (32.99%) and PSND incidence (20.90). The performance of additive genetic variance for plant stand maintained at harvest as showing high heritability, genetic advance and PSND incidence gives a lot of scope for improvement through selection. Moderate heritability and low genetic gain was observed for days to maturity and shelling out turn indicating the non-additive gene effects. Pod yield showed highly significant positive correlation with shelling out turn (0.272), kernel yield per plant (0.901) and weak negative correlation with peanut stem necrosis disease incidence (−0.063)
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In this Article
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Published In
Legume Research