Open AccessGenetic Analysis of Components of Resistance to Philippine Downy Mildew In Maize
Author(s) -
Dedi Ruswandi,
A. L. Carpena,
R. M. Lantican,
Artemio M. Salazar,
Desiree M. Hautea,
A. D. Raymundo
Publication year - 2015
Publication title -
zuriat
Language(s) - English
Resource type - Journals
eISSN - 2615-6261
pISSN - 0853-0858
DOI - 10.24198/zuriat.v13i2.6744
Subject(s) - downy mildew , biology , inbred strain , epistasis , inoculation , plant disease resistance , agronomy , dominance (genetics) , horticulture , gene , genetics
The genetics of resistance to Philippine downy mildew in maize (Zea mays L.) caused by Peronosclerospora philippinensis was studied in progeny derived from crosses between the resistant inbred P 345 and susceptible inbred Pi 17 and Pi 23. Plant generations used in this study were the PS (susceptible lines Pi 17 and Pi 23); PR (P 345); extensively F1, F2; F3; BS and BR. Plants at three leaf stages were artificially inoculated and evaluated for components of resistance, namely: disease incidence, disease severity, onset of systemic symptom, area under disease progress curve, and rate of downy mildew development. Analysis of generation means indicate that additive- dominance with epistasis gene effect play important role in all components of resistance to Philippines downy mildew.