GENETIC VARIABILITY STUDIES IN SUGARCANE (Saccharum sp. Hybrid Complex) UNDER WATER STRESS AND NON-STRESS CONDITIONS

G.S. SANGHERA¹*, L. KASHYAP², ANURADHA³, R. KUMAR⁴, R. BHATT⁵, H. SINGH^6
1Regional Research Station, Kapurthala, 144602, Punjab Agricultural University, Punjab, India
²Regional Research Station, Kapurthala, 144602, Punjab Agricultural University, Punjab, India
³Regional Research Station, Kapurthala, 144602, Punjab Agricultural University, Punjab, India
⁴Regional Research Station, Kapurthala, 144602, Punjab Agricultural University, Punjab, India
⁵Regional Research Station, Kapurthala, 144602, Punjab Agricultural University, Punjab, India
⁶Regional Research Station, Kapurthala, 144602, Punjab Agricultural University, Punjab, India
* Corresponding Author : sangheragulzar@gmail.com

Received : 18-05-2018     Accepted : 26-05-2018     Published : 30-05-2018
Volume : 10     Issue : 5       Pages : 425 - 433
Genetics 10.5 (2018):425-433
DOI : http://dx.doi.org/10.9735/0975-2862.10.5.425-433

Keywords : Sugarcane, water stress, variability, heritability, genetic advance
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to Regional Research Station, Kapurthala, 144602, Punjab Agricultural University, Punjab, India
Author Contribution : All author equally contributed

This study reports the extent of genetic variability in elite sugarcane clones and varieties for cane yield components, quality and physiological traits as affected by water stress conditions. High PCV was recorded for specific leaf weight (g) under both the environments while high GCV for this trait was recorded under water stress (E2) only. For quality traits, high PCV and GCV was recorded for CCS (t/ha) under both normal (E1) as well as water stress (E2) environments. High heritability values for major economic traits like cane yield, commercial cane sugar tons per hectare, number of shoots thousand per hectare, brix (%) and pol percentage at 10 months and commercial cane sugar (%) under water stress (E2) conditions indicates that substantial improvement can be expected by giving emphasis on the selection of these traits under water stress conditions. In this study environmental influence on the expression of different traits was observed as indicated by the differences in parameters of variability. Genetic advance (GA) indicated for traits; cane yield, CCS (t/ha) and single cane weight under both the environments (E1 and E2) were having higher values and improvement can be expected by practicing selection for these traits. High heritability coupled with high genetic advance recorded for number of shoots at 120 days (000/ha), cane yield (t/ha), CCS (t/ha) under water stress (E2) environment indicated that direct selection of these traits under water stress conditions could be effective. Moderate values of h2 and GA for traits like relative water content (%) at 60 and 120 days, chlorophyll content and some quality traits indicates that direct selection could not be much effective for these traits.

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