A review: Stay-green trait and its physiological and genetic basis of yield variation in rice

Abstract

Stay-green is one of the most significant and desirable traits which enable the crop plants to keep their green leaves in the active photosynthetic trait to maintain assimilation process and increase yield. Breeding for functional stay-green has contributed in improving crop yields, particularly when it is combined with other useful traits. This review explores the relevant literature available at national and international level on different yield attributing traits, physiological parameters and biochemical traits examined by plant breeders to sort out the most useful and promising stay green genotypes for their possible use in future breeding program. Further it has aimed to reveal the genetic variability with respect to physiological and molecular basis of stay green trait in rice. So this review has focused on various aspects like growth and growth parameters, dry matter partitioning, chlorophyll, protein and carbohydrate content, nutrient acquisition, genetic advance and heritability and correlation of grain yield with various component traits.