G × E interactions in QTL introgression lines of Spanish-type groundnut (Arachis hypogaea L.)

Rathnakumar, A L and Manohar, S S and Nadaf, H L and Patil, S C and Deshmukh, M P and Thirumalaisamy, P P and Kumar, N and Lalwani, H B and Nagaraju, P and Yenagi, B and Patil, S S and Suryawanshi, J and Khatod, J and Kumbhar, C T and Kathmale, D K and Naik, K S S and Rajesh, P and Vemana, K and Sundaravadana, S and Premalatha, N and Variath, M T and Chaudhari, S and Radhakrishnan, T and Pandey, M K and Varshney, R K and Janila, P (2020) G × E interactions in QTL introgression lines of Spanish-type groundnut (Arachis hypogaea L.). Euphytica (TSI), 216 (6). pp. 1-20. ISSN 0014-2336

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Multi-environment testing at five locations for rust and late leaf spot (LLS) resistance with 41 introgressed lines (ILs) bred using marker-assisted backcross breeding in the genetic background Spanish- type groundnut varieties identified significant genotype, and genotype 9 environment interactions (GEI) for LLS disease resistance and yield parameters. Significant GEI effects suggest the need to identify location specific breeding lines to achieve gains in pod yield and LLS resistance. The observed variable LLS disease reaction among the ILs in part suggests influence of background genotype on the level of resistance. A breeding scheme with early generation selection using molecular markers followed by phenotyping for LLS, and multi-location testing of fixed breeding lines was optimized to enhance selection intensity and accuracy in groundnut breeding. The ILs, ICGVs 14431, 14436 and 14438 with pooled LLS score at 90 DAS of 3.5–3.7 were superior to respective recurrent parent for pod yield, with early maturing similar to recurrent parents. The pod yield advantage in ILs is attributed by more number of pods, besides resistance to LLS that contributes to better filling.

Item Type: Article
Divisions: Research Program : Asia
Research Program : Genetic Gains
Research Program : Innovation Systems for the Drylands (ISD)
CRP: CGIAR Research Program on Grain Legumes and Dryland Cereals (GLDC)
Uncontrolled Keywords: Groundnut, GGE biplot, Late leaf spot resistance, Genotype x environment interactions , Stability, Introgressed lines
Subjects: Mandate crops > Groundnut
Others > Genetics and Genomics
Others > Legume Crops
Depositing User: Mr Arun S
Date Deposited: 29 Jul 2020 12:39
Last Modified: 29 Jul 2020 12:39
URI: http://oar.icrisat.org/id/eprint/11534
Official URL: https://doi.org/10.1007/s10681-020-02613-x
Acknowledgement: Authors would like to acknowledge CGIAR Research Program on Grain Legumes and Dryland Cereals (CRP-GLDC), former CRP-GL for financial assistance to conduct multi-location evaluations. Authors are thankful to Dr. Abhishek Rathore and Ms Roma Das from Bioinformatics Unit, ICRISAT for data analysis support.
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