MORPHOMETRIC AND ALLOMETRIC VARIATIONS OF A POPULATION OF TRICHODORUS PAKISTANENSIS SIDDIQI, 1962 FROM UTTAR PRADESH, INDIA

Nisha Srivastava, V. Singh Rawat, M. Ahmad

Abstract


Morphometric and allometric variations were studied on a population of Trichodorus pakistanensis Siddiqi, 1962, collected from the rhizosphere of litchi in the Doon Valley, India. In total, 25 characters were considered. Lip width, tail length and 'c' value in both sexes and cervical papillae, onchiostyle and ventromedian supplements in the males were stable according to CV% and can be used in species identification. Body length, mid-body width, body diameter at anus, 'c' value in females and guide ring position were moderately variable and correlation between characters were positive and significant at P 0.05 level. However, 't' test (P 0.05) has shown that these characters are not significant in males.

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