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Abstract : |
The pollen grains belonging to 17 different species of Gramineae were collected from Punjab University, New campus, Lahore during the spring/summer of 1984. The preservation and mounting media were farmer`s fluid, cornoy`s solution and molten jelly respectively. The size of pollen ranges from 17.50?1.96 ? (width)/17.97?1.67 ? (length) in Imperata cylindrica to 58.13?1.96 ? (width)/64.49?0.68 ? (length) in Triticum aestivum. The pollen of tetraploid and hexaploid species were larger in size as compared to those of diploids. The post pollen mitotic divisions do not occur at the site of production of pollen. Meiotic stages were observed in PMCs of some of the 17 plants. The results are discussed in relation to breeding programme leading to the formation of at least another ' man made genus' Tritipoa or 'Tritipogon'., |
