Inheritance of yellow vein mosaic virus (YVMV) tolerance in a cultivar of okra (Abelmoschus esculentus (L.) Moench)

Inheritance of yellow vein mosaic virus (YVMV) tolerance in a cultivar of okra (Abelmoschus esculentus (L.) Moench)

2000

A:PS

Okra variety IPSA Okra 1, tolerant of YVMV [bhendi yellow vein mosaic virus] was crossed to 3 susceptible genotypes, viz. Parbhani Kranti, SL-44 and SL-46, to determine the nature of inheritance of tolerance of IPSA Okra 1. Tolerance was studied in the field under natural epiphytotic disease conditions during 1996-97. A grafting test revealed that the tolerance in IPSA Okra 1 is genetic and not due to escape. The F1 hybrids were tolerant of YVMV. From the segregation pattern for disease reaction in F2 and BC1 generations of the 3 crosses, it could be hypothesized that the tolerance of YVMV in IPSA Okra 1 is quantitative, with possibly two major factors, and dependent on gene dosage with incomplete dominant gene action.

v.111(3):205-209, EUPHYTICA

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