Genetic Control of Photosynthesis in Sugarcane During Successive Ratoon Cycles.

ABSTRACT: This study analyzed the photosynthetic traits of 74 sugarcane genotypes using PAM-2500 and SPAD instruments over three years. Our findings revealed significant variations in photosynthetic characteristics among different genotypes and ratoon years, highlighting the complex interplay between genotype and ratoon age. Notably, the heritability of these traits ranged from 0.70 to 0.86, indicating a strong genetic influence. Through principal component analysis, we identified three critical aspects of photosynthesis: efficiency and light utilization, electron transfer and reaction center status, and chlorophyll content, which collectively accounted for 99.9% of the observed variance. The germplasms were categorized into three efficiency groups-high, moderate, and low-based on their photosynthet

SUBMITTER: Zhang C 

PROVIDER: S-EPMC12784760 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature