Effect of Panicle Morphology on Grain Filling and Rice Yield: Genetic Control and Molecular Regulation.

ABSTRACT: The demand for rice is likely to increase approximately 1.5 times by the year 2050. In contrast, the rice production is stagnant since the past decade as the ongoing rice breeding program is unable to increase the production further, primarily because of the problem in grain filling. Investigations have revealed several reasons for poor filling of the grains in the inferior spikelets of the compact panicle, which are otherwise genetically competent to develop into well-filled grains. Among these, the important reasons are 1) poor activities of the starch biosynthesizing enzymes, 2) high ethylene production leading to inhibition in expressions of the starch biosynthesizing enzymes, 3) insufficient division of the endosperm cells and endoreduplication of their nuclei, 4) low accumulation of

SUBMITTER: Parida AK 

PROVIDER: S-EPMC9127237 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature