Genetic analysis and screening of Indian landraces of rice for submergence tolerance in target production environment (TPE)

Complete submergence is one of the most important abiotic stress constraining rice production in India. From past few decades effect this has intensified and anticipated to increase coming years as a result global climate change. Rice developed many adaptive mechanisms grow well flood ecosystems however, too much water for long time at any stage plant growth can lead serious injuries like decaying parts, lodging reperfusion causing total crop loss. Because these conditions, farmers usually rely on traditional landraces that survive through stress, despite fact tends be very low yielding. In present study, 660 along with checks were subjected screening tolerance vegetative target environment. Identification tolerant genotypes was based survival percentage plants recovery by which they grown new tillers leaves. Principle component analysis revealed three principle components accounted 99.9 per cent variation. Regeneration found discriminating character possess additive gene action. Confirmation cluster grouped susceptible respective clusters. Results showed that, out accessions, accessions viz., IC388692, IC377169 IC205953 have highest 14 days ability similar FR13A CO 43-Sub1. Apart from above eight IC216378, IC126210, IC114413, IC386238, IC133584, IC114971, RL-1312 RL-3055 scored 1 faster regeneration denoting good stress.