Environmental Influences on Pigeonpea-Fusarium udum Interactions and Stability of Genotypes to Fusarium Wilt

Sharma, M and Ghosh, R and Telangre, R and Rathore, A and Saifulla, M and Mahalinga, D M and Saxena, D R and Jain, Y K (2016) Environmental Influences on Pigeonpea-Fusarium udum Interactions and Stability of Genotypes to Fusarium Wilt. Frontiers in Plant Science, 07 (Art253). 01-10. ISSN 1664-462X

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Fusarium wilt (Fusarium udum Butler) is an important biotic constraint to pigeonpea (Cajanus cajan L.) production worldwide. Breeding for fusarium wilt resistance continues to be an integral part of genetic improvement of pigeonpea. Therefore, the study was aimed at identifying and validating resistant genotypes to fusarium wilt and determining the magnitude of genotype × environment (G × E) interactions through multi-environment and multi-year screening. A total of 976 genotypes including germplasm and breeding lines were screened against wilt using wilt sick plot at Patancheru, India. Ninety two genotypes resistant to wilt were tested for a further two years using wilt sick plot at Patancheru. A Pigeonpea Wilt Nursery (PWN) comprising of 29 genotypes was then established. PWN was evaluated at nine locations representing different agro-climatic zones of India for wilt resistance during two crop seasons 2007/08 and 2008/09. Genotypes (G), environment (E), and G × E interactions were examined by biplot which partitioned the main effect into G, E, and G × E interactions with significant levels (p ≤ 0.001) being obtained for wilt incidence. The genotype contributed 36.51% of resistance variation followed by the environment (29.32%). A GGE biplot integrated with a boxplot and multiple comparison tests enabled us to identify seven stable genotypes (ICPL 20109, ICPL 20096, ICPL 20115, ICPL 20116, ICPL 20102, ICPL 20106, and ICPL 20094) based on their performance across diverse environments. These genotypes have broad based resistance and can be exploited in pigeonpea breeding programs.

Item Type: Article
Divisions: RP-Grain Legumes
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Fusarium wilt, GGE biplot, Genetic diversity, Host plant resistance, Multi-environment, Pigeonpea
Subjects: Mandate crops > Pigeonpea
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 07 Mar 2016 10:12
Last Modified: 21 Oct 2016 09:20
URI: http://oar.icrisat.org/id/eprint/9366
Official URL: http://dx.doi.org/10.3389/fpls.2016.00253
Funders: Department of Science and Technology (DST), Climate Change Division, Government of India, and CGIAR- Research Program Grain Legumes
Acknowledgement: We are thankful to the pigeonpea pathologists of respective locations of All India Coordinated Research Project on Pigeonpea for evaluating the disease nursery over the years for their reaction to wilt disease.
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