Author(s): M. ROY,S. AKHTAR, 1B. ATANASSOVA, 1E. BALACHEVA,P. BISWAS AND P. HAZRA

Abstract: The present investigation reports the expressivity of one positional male sterile line (ps) maintained in the Department of Vegetable Crops, Bidhan Chandra Krishi Viswavidyalaya and two positional male sterility-2 lines (ps-2) received from Institute of Genetica, Bulgarian Academy of Science, Sofia, Bulgaria in the Eastern Indian condition. Self generation of both ps and ps-2 breeding lines under open field condition showed inconsistent functional male sterile expressivity. With a view to 75% plants with stable anther non-dehiscence character along with very low of 3.8 and 5.6% selfing it appeared that the ps-2 breeding line EC 620175 hold ample promise for utilization in commercial tomato hybrid development in Indian condition. The ps breeding line, BC ps showed comparatively higher selfing percentage. However, self ed population of the \"Stable functional sterile plants\" of both these lines need to be re-evaluated keeping record of percentage selfing in terms of natural fruit set in each plant to develop an uniform families of \"Stable functional sterile plants\" possessing least selfing percentage under the present climatic condition.

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