Saxena, K.B. and Chandrasena, G.D.S.N. and Hettiarachchi, K. and Iqbal, Y.B. and Fonseka, H.H.D. and Jayasekera, S.J.B.A. (2002) Evaluation of pigeonpea accessions and selected lines for reaction to Maruca. Crop Science, 42 (2). pp. 615-618.
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Abstract
A total of 271 pigeon pea accessions were screened for resistance to M. vitrata in an experiment conducted in Patancheru, Andhra Pradesh, India, during 1994-95 and 1995-96. The reaction of lines selected from the promising accessions was also evaluated. Screening of the germplasm accessions revealed large variation in M. vitrata damage to flowers and pods. On average, the M. vitrata damage in determinate accessions (66-75%) was higher than that of nondeterminate accessions (41-50%). Resistant plants from four determinate and 12 nondeterminate accessions were selected. Further selection for resistance to M. vitrata damage among and within lines derived from the resistant plants was exercised for six generations under nonsprayed field conditions. Under insecticide-free conditions, the selections from two accessions showed significant yield advantages over controls. Data on pod damage and larval counts indicated that the resistance was conditioned through yield compensation mechanisms. This is the first report of the selection of Maruca resistant lines in pigeon pea. Further studies showed that by using the resistant genotypes it is possible to reduce the number of insecticide sprays for economic yields
| Item Type: | Article |
|---|---|
| Author Affiliation: | International Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, Andhra Pradesh, India |
| Subjects: | Crop Improvement |
| Divisions: | Pigeonpea |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 14 Feb 2011 18:25 |
| Last Modified: | 14 Feb 2011 18:25 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/1513 |
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