CS.I.R., New Delhi for financial support.

Variation in expression of genie male sterility in pearl millet ABSTRACT: In pearl millet (Pennisetum americanum (L.) Leeke), male sterility In line Vg 272 in the Initial families resulted from degeneration of microspores before first mitosis (PGM-type), but in later generations it resulted from a failure of archespore differentiation or function (Arc-type). Male sterility In this line, as well as in line IP 482, is essentially con-trolled by a single recessive gene. However, environmental conditions and modifying genes influence expression of male sterility in both lines and leads to distorted segregation ratios