Analysis of responses of novel double mutant (sh2sh2/su1su1) sweet corn hybrids for kernel sweetness under different sowing- and harvest-time
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Authors
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BRIJESH K MEHTA
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FIROZ HOSSAIN
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VIGNESH MUTHUSAMY
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RAJKUMAR U ZUNJARE
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JAVAJI C SEKHAR
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HARI S GUPTA
Keywords:
Brix, Double mutant, Harvest time, Shrunken2, Sugary1, Sowing timeAbstract
Sweet corn used as vegetable and component of various snack items, has emerged as one of the popular choices across the world. Identification of suitable sowing- and harvest-time for achieving high-kernel sweetness and yield is of paramount importance for successful commercialization of sweet corn hybrids. In the present study, 11 novel double mutant sweet corn (sh2sh2/su1su1) hybrids along with traditional sh2sh2-based checks were evaluated at three sowing- and harvest-dates. Kernel brix across double mutant sweet corn hybrids ranged from 17.6-26.6% (Mean:21.0%) and was comparatively higher than sh2sh2-based checks (19.3%). Sowing- and harvest- time had significant influence on brix accounting 19.4% and 8.5% of the total variation, respectively. Genotype × sowing time, genotype× harvest time and genotype × sowing time × harvest time interactions contributed 11.4%, 10.3% and 15.2% of the total variation for brix, respectively. Average brix across harvest dates attained highest value in third sowing and 24-days after pollination recorded the highest brix across sowing dates. Few hybrids also displayed stable brix across sowing- and harvest- time. Significant influence of sowing time on both cob- and fodder- yield was also observed, and third sowing was identified as the most favourable environment for both the traits. Kernel sweetness did not show any correlation with cob- and fodder- yield. The information generated here hold significant promise in the improvement of sweet corn. This is the first ever report of responses of sh2sh2/su1su1-based hybrids to different sowing- and harvest- time for kernel sweetness and yield.
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