Population genetics of Phytophthora infestans in Nepal and surrounding regions

Professor Hodgkiss, Ivor John   (Principal Investigator (PI))

Dr Ghimire Sita Ram   (Co-Investigator)

Professor Hyde Kevin David   (Co-Investigator)

Dr Drenth   (Co-Investigator)

Dr Liew Edward Chau Yin   (Co-Investigator)

36

1999-01-01

953000

Population genetics of Phytophthora infestans in Nepal and surrounding regions

null

N/A

HKU 7214/98M

General Research Fund (GRF)

1998

Completed

To determine the mating types of Phytophthora infestans present in various potato and tomato growing areas in Nepal. Is mating type A2, previously unknown to this region, now present? To characterise isolates of P. infestans collected in this region in terms of pathogenic races based on differential potato cultivars. To determine the levels of resistance of P. infestans isolates to metalaxyl, a systemic fungicide commonly used in the control of potato late blight. Are isolates collected from urban and peri-urban areas where this fungicide is routinely used more resistant to metalaxyl than those collected in areas where fungicide application is rarely or not practised? To assess the gentypic diversity of the P. infestans isolates based on DNA fingerprinting and allozyme analysis. This will give an indication of the genetic variability and the extent of contribution of sexual reproduction, if present, to the diversity of this pathogen in the field.