Three Pea Seedborne Mosaic Virus Pathotypes from Pea and Lentil Germ Plasm

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Abstract
Three isolates of pea seedborne mosaic virus (PSbMV), P-1 and P-4 from pea (Pisum sativum) and L-1 from lentil (Lens culinaris) germ plasma accessions, were distinguished by their capacity to infect pea genotypes. Resistance in peas was isolate-specific. Resistance to the L-1 isolate was associated with bean yellow mosaic virus resistance and also with a delayed reaction to isolate P-4. Several pea germ plasm accessions were resistant to all three isolates. All isolates were infective to 26 genetic lines of chickpea (Cicer arietinum), a new host, but not to 12 accessions of pigeon pea (Cajanus cajan). Antisera produced against the cytoplasmic inclusion protein induced in peas by P-1 and L-1 were useful in detecting infections by the indirect ELISA method and were generally more sensitive than antisera to the viral protein.