Genetic diversity of wheat against CCN

Tylenholaimus cynodonti Nasira, Shahina and Erum, 2005 collected from soil in the vicinity of wheat (Triticum aestivum L.) from Karachi, Sindh, Pakistan. Tylencholaimus cynodonti Nasira, Shahina and Erum, 2005 is characterized by its small size (L=0.55-0.69 mm), lip region marked off from the adjacent body by a constriction, 6.4-7.2 ¿m long odontostyle, odontophore shorter than lip region width, slender part of pharynx expand abruptly, pharyngeal bulb 70-78 ¿m long, female genital system amphidelphic, V= 59-63%, tail 16-29 ¿m long, bluntly conoid to hemispheroid and male absent.