Breakdown of Meiosis in a Tetraploid Clone from Dichanthium-Bothriochloa Complex

The paper describes the details of meiosis in a tetraploid clone(collection number 260) from Dichanthium-Bothriochloa complex.Meiosis is reported to have broken down very early in prophaseI. Pollen mother cells are reported to be present in the formof plasmodial mass or syncyte with several nuclei in each ofthem. Each syncyte, presumably, gave rise to one pollen grainwithout undergoing division. Consequently, each pollen grainhad one to several nuclei. A brief note on morphology and taxonomy of the collection isalso added. Although the spikelet morphology indicated it tobe a natural hybrid Bothrio-chloa grahamii x B. intermedia,in other morphological characters, it resembled Dichanthiumannulatum. It was concluded, therefore, that it was a productof continuous natural introgression.