Cyto-Morphological Studies of Some Dicot Plants from Rajasthan (India)

Abstract

At present male meiosis and pollen fertility have been studied in 17 species of dicots from different localities of Rajasthan. Varied cytotype reports of Capparis decidua (n=18), Ipomoea pes-tigridis (n=30) and Triumfetta rhomboidea (n=8) have been reported for the first time from world level. Meanwhile, Orobanche ramosa (n=12) is the first diploid cytotype report from India. Present chromosome counts for the remaining species have already been reported by other researchers. The course of meiosis varies from normal to abnormal in different populations of the species. The anomalous taxa are marked with meiotic abnormalities in the form of cytomixis, chromosomal stickiness, unoriented bivalents, formation of laggards and bridges resulting in abnormal microsporogenesis and production of heterogenous sized fertile pollen grains.