Evaluation of Recombinant Inbreed Lines (RIL) population of upland rice under stress and non stress conditions for grain yield and drought tolerance

Abstract

Drought is the major abiotic factor that limit rice productivity in rainfed and upland occuring ecosystems; worldwide, it reduces yield by 15-50 % depending on the stress impact on crop growth period. Stress period occuring more than 7-14 days drastic reduction is observed in all the parameters i.e. average plant height 12.9-29.5%, panicle number 41.6-65.4%, yield of inbred lines 17.34 -86.04% followed by an average of overall 44.86% over non stress condition. Similarly it was found that biomass, harvest index, filled grain per panicle, total grain per panicle, fertility % and so on were reduced under stress condition in comparison to congenial condition.Variation in drought susceptibility index (DSI) and drought resistant index (DRI) in the inbred lines ranges 1.081 to 2.116 and 0.04 to 2.80 respectively. Significant variations observed in the population for different agronomical traits and derived indices would facilitate selection of recombinant inbred lines (RILs) with drought tolerance and high yielding.

Agronomic Response of Local Upland Rice Cultivars on Growing under Two Cultivation Systems

“…In contrast to the upland cultivation system (dry land), water needs are limited because rice growth is solely dependent on rainfall. Drought-affected areas have significantly less dry matter accumulation during flowering and maturity (Kumar et al, 2018). As a result, local upland rice production is lower in dryland with upland cultivation systems than rice fields.…”

Comparison of Effectiveness of Arbuscular Mycorrhiza Fungi (AMF) on Vitis vinifera under Low Irrigation Conditions

“…Drought stress, decreased crop quality and yield and also restrict the geographical range over which production of crop is viable (Thakur et al 2010: Kumar et al 2018. Abiotic stress such as drought, causes generate secondary stresses, including oxidative and osmotic stress, which have harmful effects on the plants and causing changes in the plants growth, development and metabolism (Kranner et al 2010).…”