Broad-based resistance to pigeonpea sterility mosaic disease in accessions of Cajanus scarabaeoides (L.) Benth uri icon


  • Sterility mosaic disease (SMD) is the most important biotic constraint on pigeon pea production in the Indian subcontinent. It is caused by pigeon pea sterility mosaic virus (PPSMV) that is transmitted by the eriophyid mite, Aceria cajani. Several SMD resistant/tolerant pigeon pea genotypes identified showed resistance to a mild strain of PPSMV (Patancheru isolate) but are highly susceptible to a severe strain of PPSMV (Bangalore isolate), and also to major pigeon pea fungal pathogens and pests. Wild relatives of pigeon pea have been shown to possess high levels of resistance to several of these biotic constraints. Sixty accessions of Cajanus scarabaeoides were screened against mild and severe strains of PPSMV. The accessions were evaluated for resistance by the leaf-stapling method, followed by the testing of promising accessions by petiole grafting. The test plants were monitored for mites and assayed for PPSMV infection by DAS-ELISA. Of the 60 accessions evaluated, 21 (ICP15684, 15688, 15692, 15695, 15697, 15699, 15700, 15701, 15702, 15703, 15707, 15712, 15725, 15726, 15728, 15734, 15736, 15737, 15739, 15740 and 15741) were resistant to both the mild and the severe strains of PPSMV. These can be exploited in breeding programmes to increase the degree and to diversify the genetic base of resistance to SMD in the cultivated gene pool

publication date

  • 2003