Components of partial resistance in peanut genotypes to isolates of Phaeoisariopsis personata, Cercospora arachidicola and Puccinia arachidis
1996
Patcharee Thongtawat
In an attempt to verify the genetic status of the three most important peanut leaf diseases (viz. black leaf spot-Phaeoisariopsis personata, brown leaf spot - Cercospora arachidicola and rust - Puccinia arachidis) in Thai ecology. It was demonstrated via detached leaf inoculation technique with eight isolates of each pathogen collected from eight provinces all over the country and maintained separately in vivo on Tainan-9 in a quarantine facilities till the due couse of this research work. All of these isolates received a similar technique and treatment of experiment. The objectives of this study were categorized into three topics e.g. 1) Morphological and physiological characteristics, 2) Investigation on the in vivo effects of components of partial resistance of nine peanut genotypes against these three pathogen isolates. Observation on morphological properties (conidium size and number of septa per conidium) and conidia germinability of all isolates of three important pathogens of peanut provided no evidence that supported the pathogen isolate differenceness. Contradictory, the Thai pathogen genotypic pool forms a unique ecological niche which appeared vary from other sources. Components of partial of resistance in nine peanut genotypes performed consistently well through out this experiment as previously classified. Non significant differences found when observation made on various components against isolates of these pathogens, viz. number of lesions per leaflet, lesion size, number of spores per lesion at 30DAI, number of sporulating lesions at day 20 (percent 20 LS) and day 30 (percent 30 LS). The prime results explained that, pertaining to genetic basis, there were no evidence of pathogenicity difference among isolates of three pathogens in Thai host-parasite system.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Kasetsart University