Author/Authors :
Reddy، K. R. نويسنده , , Nagendra، K. N. نويسنده , , Payasi، Devandra Kumar نويسنده Jawaharlal Nehru Krishi Vidyalaya (JNKV), Regional Agricultural Research Station, Sagar , , Varma، C. Mohan Kumar نويسنده Bayer Crop Science, Singapore , , Anantha، M. S. نويسنده Central Rainfed Upland Rice Research Station (CRRI), Hazaribag , , Shenoy، Vinay نويسنده Barwale Foundation , , Shashidhar، H. E. نويسنده University of Agricultural Sciences, GKVK, Bengaluru ,
Abstract :
Twenty CMS/Maintainer lines were evaluated for root morphology, as well as grain yield under aerobic condition. These lines were evaluated for various attributes related to morphological and physiological traits. The aim was to determine the extent of variability between and among CMS/maintainer lines and the relationship existing between yield and root related traits for effective utilization under aerobic rice hybrid breeding program. Combined ANOVA for maintainer lines related to morphological and grain yield related traits revealed significant variation for years, moisture regime and genotypes and their interactions under different moisture regimes, whereas combined ANOVA for root related traits revealed significant variation for genotypes but there was mixed results for year and type (A/B). Test of significance for root and shoot related traits revealed that out of 20 genotypes, 15 genotypes showed no significant difference between CMS lines and their respective maintainer lines. Correlation studies showed highly significant positive correlation between single plant yield and root related traits viz., maximum root length and root volume under both the moisture regimes. Molecular diversity analysis of twenty CMS/maintainer lines and seven commercial checks revealed three major clusters and cluster II consists of four out of five checks.
