Articles
BREEDING POTENTIAL OF INDIAN GERMPLASM OF CUCUMIS SATIVUS VAR. HARDWICKII FOR CUCUMBER IMPROVEMENT
Article number
871_56
Pages
409 – 416
Language
English
Abstract
The Cucumis sativus var. hardwickii lines had high number of lateral branches per plant (6.44) and number of fruits per plant (18.57) but fruit length (5.03 cm), fruit diameter (3.84 cm) and average fruit weight (53.37 g) were low.
Fruit yield per plant ranged from 316.83 g (IC 277048) to 1563.95 g (IC 331620) and its mean value was recorded as 707.22 g.
Highly significant and positive phenotypic correlation was found between fruit yield per plant and number of fruits per plant (0.76), average fruit weight (0.73), pulp breadth (0.73), fruit length (0.71) and fruit diameter (0.68). Only one cross PCUC 15 × P7 showed superiority over better parent (PCUC 15) in negative direction for days to female flower anthesis.
Seven crosses exhibited significant heterosis over standard parent in positive direction for no of lateral branches per plant.
Three crosses showing significant heterobeltiosis for number of fruits per plant were PCUC 8 × P7 (44.22%), PCUC 28 × P5 (18.61%) and PCUC 15 × P7 (18.44%). Four crosses showed superiority over better parent (cucumber genotypes) for fruit yield per plant.
The highest value of heterobeltiosis was estimated in cross PCUC 15 × P3 (61.61%) followed by PCUC 15 × P7 (50.90%), PCUC 8 × P7 (43.01%) and PCUC 15 × P5 (28.43%). The cucumber genotype PCUC 28 was identified as the best general combiner for earliness, number of fruits per plant, average fruit weight, fruit length and fruit yield per plant.
The Cucumis sativus var. hardwickii genotypes P7, P1 and P3 have been identified as good general combiner for number of fruits per plant and fruit yield per plant.
Generation mean analysis showed that additive components were predominant for days to female flower anthesis, vine length and average fruit weight.
Interaction effects were predominant for number of lateral branches, number of fruits per plant, fruit length and fruit yield per plant.
This study showed that Indian germplasm of Cucumis sativus var. hardwickii has great potential for their utilization for future cucumber improvement program.
Fruit yield per plant ranged from 316.83 g (IC 277048) to 1563.95 g (IC 331620) and its mean value was recorded as 707.22 g.
Highly significant and positive phenotypic correlation was found between fruit yield per plant and number of fruits per plant (0.76), average fruit weight (0.73), pulp breadth (0.73), fruit length (0.71) and fruit diameter (0.68). Only one cross PCUC 15 × P7 showed superiority over better parent (PCUC 15) in negative direction for days to female flower anthesis.
Seven crosses exhibited significant heterosis over standard parent in positive direction for no of lateral branches per plant.
Three crosses showing significant heterobeltiosis for number of fruits per plant were PCUC 8 × P7 (44.22%), PCUC 28 × P5 (18.61%) and PCUC 15 × P7 (18.44%). Four crosses showed superiority over better parent (cucumber genotypes) for fruit yield per plant.
The highest value of heterobeltiosis was estimated in cross PCUC 15 × P3 (61.61%) followed by PCUC 15 × P7 (50.90%), PCUC 8 × P7 (43.01%) and PCUC 15 × P5 (28.43%). The cucumber genotype PCUC 28 was identified as the best general combiner for earliness, number of fruits per plant, average fruit weight, fruit length and fruit yield per plant.
The Cucumis sativus var. hardwickii genotypes P7, P1 and P3 have been identified as good general combiner for number of fruits per plant and fruit yield per plant.
Generation mean analysis showed that additive components were predominant for days to female flower anthesis, vine length and average fruit weight.
Interaction effects were predominant for number of lateral branches, number of fruits per plant, fruit length and fruit yield per plant.
This study showed that Indian germplasm of Cucumis sativus var. hardwickii has great potential for their utilization for future cucumber improvement program.
Publication
Authors
H. Choudhary, D.K. Singh
Keywords
wild germplasm, genetic diversity, sequential fruiting, lateral branches, variability, heterosis, gene action
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