Irregular Meiosis Associated with Pollen Sterility in Vetiveria zizanioides (Linn.) Nash

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Abstract
The pollen and seed fertility of 75 clones of Vetiveria zizanioldes collected from different parts of India was examined for the purpose of providing a basis for the improvement of this essential oil plant. Some clones were highly pollen sterile. A preliminary examination of 4 clones differing in fertility indicated that univalent formation at diakinesis and metaphase, combined with lagging at anaphase followed by the production of micronuclei, were closely correlated with the observed sterility.