Assessment of patterns of rice major traits and their influence in shaping grain yield

Abstract

Investigating exclusive as well as patterns of major traits plays a key role in yield improvement of rice. We evaluated 54 genotypes for 28 major characters putatively boosting rice yield. Our results showed that patterns of all length and width traits, panicles traits, tillering and panicle position have a profound influence on grain yield per plant (PPGW). Width factors (traits expand horizontally) impact was higher on grain yield than length factors (traits expand vertically). Among traits the number of tillers per plant showed the super influence on per plant yield than panicle traits. The study propose a convincing picture of an ideotype that would better accountable for high production of having high number of tillers with reasonable thickness, moderate plant height, lower panicle position, intermediate panicle length, low number of primary branches and high number of secondary branches per panicle with high grain yield per plant and harvest index. Further, the investigations also suggest molecular approach to get insight to shared genes or cluster of genes and their interaction which shape various traits or factors in a particular way.