A vigorous mutant sugarcane (Saccharum sp.) clone Co 527.

Area of Science:

• Plant breeding and genetics
• Agricultural science
• Biotechnology

Background:

• Sugarcane (Saccharum officinarum) breeding aims to enhance yield and economic traits.
• Gamma irradiation is a mutagenic technique used to induce genetic variability in crops.
• Developing early-maturing sugarcane varieties can optimize harvesting and processing schedules.

Purpose of the Study:

• To isolate and characterize a novel sugarcane mutant with improved growth and yield potential.
• To evaluate the agronomic performance of the gamma-ray induced mutant compared to the parent variety Co 527.
• To investigate the underlying genetic basis of the observed mutant traits.

Main Methods:

• Gamma irradiation of vegetative buds of sugarcane variety Co 527.
• Isolation and selection of promising mutants across generations (vM1-vM4).
• Comparative analysis of growth rate, shoot population, millable cane yield, sucrose content, and juice purity between mutant and parent.
• Cytological examination to determine chromosomal number variations.

Main Results:

• A vigorous, fast-growing mutant was successfully isolated, maturing 60 days earlier than Co 527.
• The mutant displayed a 50% higher growth rate and a significantly greater early shoot population.
• Increased millable cane yield was observed in the mutant, while sucrose content and juice purity remained unaffected.
• The mutant exhibited a chromosomal reduction of 2-3 compared to the parent variety, indicating a chromosomal basis for the mutation.

Conclusions:

• Gamma irradiation effectively generated a superior sugarcane mutant with enhanced early vigor and yield.
• The characterized mutant presents a valuable genetic resource for sugarcane improvement programs.
• The observed chromosomal variation may be linked to the accelerated growth and early maturity traits.