Genetic Analysis of Cytoplasmic Systems in Sorghum

Abstract

F1 studies on pollen sterility, pollen shedding and seed set enabled the classification of the cytoplasmic sources into three groups: (1) CK60A and Nagpur- A based on milo-A,; (2)M 35-1A and M31-2A-A2 (Tentative); (3) VZM2A and G1A - A, (Tentative). The correspondence of the A, with A, steriles reported from USA is yet to be established- These studies provided evidence for the seasonal (temperature) interaction for pollen fertility and seed set, the M35-1A and M31-2A steriles, exhibiting greater levels of fertility during summer season. in some crosses, evidence for the operation of self-incompatibility was available.