Molecular and Morphometric Identification of P. Thornei and P. Neglectus in Southwest of Iran

Abstract

Root lesion nematodes are considered as important agents of wheat yield reduction in most parts of the wheat growing areas. To elucidate disease situation in Khuzestan, a southwestern province of Iran, 40 soil & wheat root samples were collected. Morphological studies indicated that disease casual agents belong to Pratylenchus thornei and P. neglectus species. Morphometric studies showed that Differences exist in the body length compared with the studies done so far on these two species of nematode. The DNA of the two species, namely Pratylenchus thornei and P. neglectus, were extracted concidering Madani et al. [1], Silva et al. [2] and Waeyenberg et al. [3] plus some modifications. The quantity and quality of extracted DNA and its ability in DNA amplification and clearance of PCR bands were compared and the results showed that modified methods of Madani et al. [1] and Waeyenberg et al. [3] were the best methods for P. thornei and P. neglectus species. Polymerase chain reaction (PCR) and speciesspecific primers were used to identify P. thornei and P. neglectus.

Characterization of Pratylenchus crenatus and P. neglectus (Nematoda: Pratylenchidae) associated with wheat crop

“…Morphometrics of females of P. crenatus is within the minimum and maximum ranges given by Castillo and Vovlas (2007) except radio 'b' which is smaller 4.2 -5.1 vs 4.9 -7.9. All morphometrics of P. neglectus are within the minimum and maximum ranges given by Castillo and Vovlas (2007) and Fayazi et al (2012) except ratio 'm' where minimum value is smaller 31 -50 vs 40.8 -48.5 (Fayazi et al, 2012). P. crenatus stylet knob width is 3±0.51 (3 -4) μm where P. neglectus stylet width is 5±0.6 (4 -6) μm; P. crenatus tail tip is crenate where as P. neglectus tail tip is without annulation.…”

Molecular and morphological variation of the root-lesion nematode Pratylenchus neglectus

“…Recently, Pratylenchus haiduongensis Nguyen, Le, Nguyen, Nguyen, Liebanas & Trinh, 2017 and Pratylenchus rwandae Singh, Nyiragatare, Janssen, Couvreur, Decraemer & Bert, 2018 have been described from Vietnam and Rwanda, respectively. Morphological variation among the species of Pratylenchus has been indicated previously (Loof 1991;Ryss 2002;Fayazi et al 2012). However, accurate diagnose of Pratylenchus spp.…”