The cyst nematode Heterodera cajani is one of the major endemic diseases of pigeonpea, an important legume for food security and protein nutrition in India. It occurs in several pulse crops grown over a range of Indian agro climatic conditions but the extent of its intraspecifc variation is inadequately defned. In view of this, 11 populations of H. cajani were analyzed using morphometrics and the results correlated with those obtained from an AFLP approach using 24 primer pair combinations that amplifed a total of 1278 AFLP markers. Te cluster solution from this binary data indicated similarities for fve populations that difered from those suggested by morphometrics. Te diferences obtained could not be related to geographic distance between populations. Te data suggests that recent and long distance dispersal has occurred whose causes need to be defned to restrict further feld introductions. Four AFLP primer pairs clustered the populations similarly to that generated using all 24 primer pairs. Tis simplifed approach may provide a rapid basis for discriminating populations for their future management and help to check further distribution in agricultural trade. It may also have potential to determine diferences in populations that relate to host range or virulence to resistance genes. © Sashi Bhushan Rao et al.
Rao, S. B., Rathi, A., Gothalwal, R., Atkinson, H., & Rao, U. (2011). A comparison of the variation in Indian populations of pigeonpea cyst nematode, Heterodera cajani revealed by morphometric and AFLP analysis. ZooKeys, 135, 1–19. https://doi.org/10.3897/zookeys.135.1344