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Simultaneous Selection for Stable Disease Resistant and High Yielding Groundnut Genotypes under High Rainfall Area

Author(s)
TSSK Patro Acharya NG Ranga Agricultural University, Agricultural Research Station,Vizianagaram-535 001, A.P.,India
N Anuradha Acharya NG Ranga Agricultural University, Agricultural Research Station,Vizianagaram-535 001, A.P.,India
Ashok Singamsetti Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University,Varanasi-221005, U.P.,India
Y Sandhya Rani Acharya NG Ranga Agricultural University, Agricultural Research Station,Vizianagaram-535 001, A.P.,India
U Triveni Acharya NG Ranga Agricultural University, Agricultural Research Station,Vizianagaram-535 001, A.P.,India
Abstract
Groundnut (Arachis hypogaea L.) is a allotetraploid, self-pollinated crop valued for its high oil and protein content. Its haulm is used as a source of fodder. In addition, being a leguminous crop, it enriches the soil by fixing atmospheric Nitrogen. The traditional area under groundnut cultivation is endangered and is being gradually replaced by other commercial crops in high rainfall areas. High yielding genotypes which can perform stably from year after year are required to sustain the groundnut area. This is an attempt in groundnut to study simultaneously the role of weather, AMMI stability for pod yield and disease resistance. Thirteen best performing genotypes were evaluated for yield, leaf spot resistance and other agronomic traits during three consecutive years. This study helped in understanding the role of temperature and relative humidity in the increased expression of leaf spots and in turn reduction in pod yields. It also revealed that genotypes were highly influenced by the environment for pod yields while genotypes contributed more variation for disease score. Genotype × Environment Interaction (GEI) had a significant role for both pod yield and disease score. Simultaneous selection for high yield, yield stability, disease resistance and disease stability was best achieved when more weights were assigned to pod yield and disease score followed by yield stability and least weight to disease stability in the selection index. The best performing groundnut genotypes identified in the present study for high rainfall areas were K 1789, Kadiri 9 and TCGS 1097.
Publication Details
Page(s) 85-92
DOI 10.17957/IJAB/15.1955
Published Journal: International Journal of Agriculture and Biology, Volume: 28, Issue: 2, Year: 2022

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Keywords
leaf spot, Groundnut, stability, AMMI, Selection index, Simultaneous selection
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