Seasonal Effects on the Genetic Relationships among Agronomic and Quality Traits in Sugarcane (Saccharum officinarum L.) in the North Coastal Zone of Andhra Pradesh

D.  ADILAKSHMI; P.V.  PADMAVATHI; D.  PURUSHOTAMA RAO; CH. MUKUNDA RAO MUKUNDA RAO

doi:10.54894/JISCAR.43.1.2025.162674

Authors

D. ADILAKSHMI Department of Plant Breeding, Regional Agricultural Research Station, Acharya N.G. Ranga Agricultural University, Anakapalle, Visakhapatnam - 531 001, Andhra Pradesh, India
P.V. PADMAVATHI Department of Plant Breeding, Regional Agricultural Research Station, Acharya N.G. Ranga Agricultural University, Anakapalle, Visakhapatnam - 531 001, Andhra Pradesh, India
D. PURUSHOTAMA RAO Department of Plant Breeding, Regional Agricultural Research Station, Acharya N.G. Ranga Agricultural University, Anakapalle, Visakhapatnam - 531 001, Andhra Pradesh, India
CH. MUKUNDA RAO MUKUNDA RAO Department of Crop Physiology, Regional Agricultural Research Station, Acharya N.G. Ranga Agricultural University, Anakapalle, Visakhapatnam - 531 001, Andhra Pradesh, India

https://doi.org/10.54894/JISCAR.43.1.2025.162674

Keywords:

: Correlation, Path analysis, Plant crop, Ratoon crop, Sugarcane, Variability

Abstract

The current study aims to evaluate the seasonal impact on the response of genetic variability, trait associations, and selection potential for cane yield and quality traits in eleven sugarcane clones over crop seasons. The total of twelve cane yield and quality traits was recorded for observations. The analysis of variance revealed that significant variation was observed for all cane yield and juice quality traits across the three crop cycles. Cane yield and yield attributes exhibited a moderate to high degree of genotypic and phenotypic coefficients of variation, while quality traits, viz., sucrose (%), Brix (%), and CCS (%), exhibited a low degree of variability. Both cane yield and juice quality traits show a high degree of heritability across crop seasons. Cane yield and yield-related traits exhibit high heritability coupled with a high genetic advance as a percentage of the mean. In contrast, juice quality traits such as sucrose (%), Brix (%), and CCS (%) exhibit high heritability coupled with moderate genetic advance as a percentage of the mean across the crop seasons. Genotypic correlation demonstrates that the cane yield was positively and significantly associated with the number of shoots at 120DAP, millable canes, and CCS yield across the seasons. Additionally, traits such as the number of shoots at 240DAP, stalk length, and jaggery yield exhibited significant positive correlations in the first and second plant crops. Path analysis indicated that CCS yield, jaggery yield, and brix percentage showed positive direct effects as well as significant positive correlations to cane yield, confirming a true genetic relationship among these traits.

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