Resistance evaluation of popular rice varieties to Magnaporthe oryzae B. Couch., isolated from different rice growing areas in the Philippines

Date

12-2012

Degree

Bachelor of Science in Agriculture

Major Course

Major in Plant Pathology

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Johnny F. Balidion

Abstract

The off campus research internship was conducted at Philippine Rice Research Institute (PhilRice) ? Central Experiment Station, Maligaya, Science City of Muñoz, Nueva Ecija from May 2, 2012 to June 19, 2012. The research internship includes direct participation in the on going rice blast disease evaluation study for popular rice varieties in the Philippines. The activities include farm visits, observation of ongoing research activities and laboratory work such as culture media preparation, single spore isolation, inoculum production, test plant preparation, inoculation and disease assessment. Rice blast resistance of popular rice varieties was evaluated by artificial inoculation using different Philippine isolates of Magnaporthe oryzae. Leaf severity of rice blast was assessed on the inoculated plants at seven days after inoculation using the classification scale leaf only reaction of Hayashi et al. (2009). Out of the 22 popular rice varieties, only two showed consistent resistance to the blast fungal isolates used namely: NSIC Rc 122 and PSB Rc 82. Fourteen varieties showed intermediate disease reaction results namely: NSIC Rc 148, 160, 214, 152, 144, 222, 158, 212, 172, PSB Rc 14, NSIC Rc 238, 240, 21 SR and 274. While six varieties were shown to have susceptible reaction namely: NSIC Rc 128, 138, 216, 154, 146, and 280.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993 2012 A3 C37

Document Type

Thesis

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