Manifestation of Heterosis and Combining ability in Cucumber for Horticultural Traits
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Keywords:
Combining Ability, Cucumber, Gynoecious, Monoecious, HeterosisAbstract
An experiment was carried out during 2021 and 2022 at Vegetable Research Centre, GBPUA&T, Pantnagar to investigate the earliness, yield, variation and its effect on cucumber. The present study comprises of 30 F1’s, developed by Line × tester crossing 10 line (gynoecious) and 3 tester (monoecious) and 13 parents. A significant difference for mean sum of square was found in all the horticultural traits under study. In the cross combination, PPCUC-2 × PCUC-28 followed by PPCUC-9 × PCUC-28 is found best hybrids for horticultural traits. PPCUC-2 (line) and PCUC-28 (tester) were best general combiner for earliness and yield which can be parent in breeding programme for development of genoecious × monoecious hybrids. PPCUC-3 × PCUC-28 was best specific combiner for most of characters. Information of gene actions obtained from the study indicates the predominance of non-additive gene action which is highly desirable to develop hybrids in cucumber with yield traits. PPCUC-2 (line) and PCUC-28 (tester) were most promising parents for most of traits. PPCUC-9 × PCUC-51 was most promising cross. Based on finding, it is also possible to separate generations using promising hybrids in order to find pure lines with high yields and high-quality fruit.
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