Applicability of photosynthesis efficiency for successful prediction of near-isogenic lines rice (Oryza sativa L.) to different planting densities.

摘要

Introduction: Rice in Ethiopia is one of strategic food security commodities and its expansion is also linearly increasing in different parts of the country (MoA, 2010). However, the culm habit in rice, classified into five different types such as erect (<30°), Intermediate (≤ 45°)，Open (≤ 60°)，spreading (〉＞ 60° < 80°) and procumbent (angle rests on the ground) (IRRI,1980). These culm habit regulates the genotype for the responsiveness of N and light interception. The rate of Diomass production is determined by the rate of canopy photosynthesis, wnich consists of single leaf photosynthesis, leaf area index, and light interception efficiency. The crop photosynthetic rate of plant is dependent on the absorption of photosynthetically active radiation (PAR), by the leaves as well as the green actively growing plant parts that contains chlorophyll pigments. So, the main purpose of this study is to determine the applicability of photosynthesis efficiency and light interception for success full prediction in the canopy of NILs rice.