Stability analysis in advanced clones of sugarcane Saccharum spp. complex
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Date
2022-08
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G. B. Pant University of Agriculture & Technology, Pantnagar, Uttarakhand. PIN 263145
Abstract
The present investigation entitled “Stability analysis in advanced clones of sugarcane (Saccharum spp. complex)” was conducted with 18 advanced clones of Sugarcane including three checks viz., CoS 767, CoPant 97222 and Co 05011 to estimate the genotype×environment interaction and stability parameters using Eberhart and Russell model. The experiment was conducted in randomized block design at three different environments viz., Norman E. Borlaug Crop Research Centre of Govind Ballabh Pant University of Agriculture and Technology, Pantnagar (E1), U.P Council of Sugarcane Research, Shahjahanpur (E2) and, PAU Regional Station, Kapurthala (E3). At each environment observations were recorded for fifteen yield and yield contributing traits viz., germination percent, tillers/ha, brix percent at 10 months, purity percent at 10 months, sucrose percent at 10 months, number of millable cane/ha, single cane weight (kg), cane diameter (cm), cane height (m), cane yield (t/ha), CCS yield (t/ha), brix percent at 12 months, sucrose percent at 12 months, purity percent at 12 months and CCS percent at 12 months. Analysis of variance at each environment revealed that genotypes exhibited highly significant differences for all characters under study. Further, the pooled analysis of variance over three environments also exhibited significant differences among genotypes for all the fifteen traits. The estimates of the environmental index showed that E1 was the most favourable environment for nine traits followed by E2 for seven traits and E3 for five traits. Based on the mean performance, CoPant 97222 was registered as the best check for nine traits followed by CoS 767 for six traits. Likewise, among the entries, Co17018 was found superior to best checks for seven traits, followed by CoH 17262 for six traits and CoS 17234 and CoPb 17214 for five traits. The G X E interaction was found significant for all characters except for two traits namely, purity % at 10 months and purity % at 12 months. Based on the estimates of stability parameters as per Eberhart and Russell model, CoPb 17214 was observed as stable genotype for all traits except tillers/ha. Similarly, CoS 17236 and CoH17261 were found stable for fourteen traits except cane yield t/ha. Likewise, among the checks, Co 05011 was found stable for all traits except for cane yield, here this genotype was responsive in favourable environment. Check, CoS 767 was found stable for all traits except for germination percent. Based on the study the clone Co17018 was identified stable for cane yield and sucrose percent at 12 months, along with superiority over all the three checks. Hence, this genotype can be recommended for cultivation over different environments. While, two clones viz., CoS 17234 and Co 05011 were found responsive for cane yield in favourable environment, hence these can be recommended for cultivation under resource rich environment.