NATURAL SELECTION OF KATARIBHOG LAND RACES AGAINST DISEASE REACTION

Abstract

Disease during field the in studied were katari) var. L sativa (Oryza rice kataribhog aromatic the in frequency disease high to due design RCBD following 2010 June-December, Radhunipagol, Philippine, viz. were races land The country. the of region northwestern local from collected and katari Badhua and Tajmohol Behulabasor, Jota, Jira, Bolder, yield. and intensity disease content, aroma on recorded were Data Dinajpur. of farmers found and stages growth different at done was content aroma for test sensibility Organic seedling in zota and Radhunipagol in five of out 4.50 above aroma of grades highest the narrow blight, sheath spot, brown blast, of prevalence The stages. inflorescence and Zota in lowest the found were tiller per and hill per diseases burn stack and spot brown and 25.00% 7.00%, 7.17%, 12.10%, and 10.00%; and 12.23% 25.00%, 17.20%, 16.67%, (77.80%), Bolder (49.43%), Badhua in were highest the where respectively 2.77%, (36.67%), Jira and (25.50%), Bodhua and (52.20%) Bolder (62.20%), Radhunipagol (27.23%), Tajmohol and (48.90%) Bolder (42.20%), Radhunipagol (51.63%), Bolder false blast, panicle of severity disease The transplanting. after days 60-90 at respectively Zota in lowest (46.67%) Zira in highest significantly found were spot grain and smut (59.67%) Bolder in highest (8.87%), Zira in lowest (15.00) Zota in highest (12.20%), leaf of prevalence The heading. after days 25 at respectively (11.00%), Zota in lowest Zota in lowest the and (30.00%) races land Jira in highest found was disease blast and spot brown narrow spot, brown blast, by infection area leaf percent (7.23%). The Bolder in highest (7.80%), Zota in lowest (53.33%) Jira in highest were burn stack Philippine in lowest (82.23%) Bodhua in highest (6.00%), Philippine in lowest (95.57%) where respectively (5.43%), Zota in lowest (30.00%) Tajmohal in highest and (5.00%) in lowest (44.43%) Radhunipagol in highest was blight sheath by infection area sheath (2.87- Bolder in highest found was tillers dead of numbers average The (5.00%). Zota after days 60-90 during races land katari Philippine in (1.00) lowest the and 7.47) the was level soil from (cm) height lesion blight sheath relative The transplanting. Katari Philippine in was cm) (15.00 lowest the where Radunipagol in cm) (39.53 highest land katari local eight the resistant, disease for selection In transplanting. after days 90 at (Breda oryzae Bipolaris Sacc., grisea Pyricularia to susceptible be to found were s races Alternaria and Miyake oryzae Cercospora Kuhn, solani Rhizoctonia Shoen, Haan) de different the of terms In level. resistance varying with Ellis M.B. padwickii (Ganguly) highly to moderately were s races land eight all (0-9), scoring severity disease highly very blast; panicle in resistant was Philippine but pathogen blast to susceptible highly very blight; sheath to resistant highly very but spot brown to susceptible Zota but burn stack to resistant moderately and spot leaf brown narrow to susceptible yield highest The spot. leaf brown narrow to susceptible highly to resistant showed katari was t/ha) (2.05 lowest the and races land katari Jota in found was t/ha) (3.46 hectare per Zota in highest was (t/ha) Behulabasor over increase yield Percent Behulabasor. in that suggest results selection resistance Field (60%). Philippine by followed %) (68.78 biotic these to level resistance relatives with variability genetic have races land all Zota and pathogen, blast neck to susceptibility high very reflecting is katari Jira agents, Philippine by followed aroma higher with yield higher significantly to attributed is katari katari.