Heterotic patterns in hybrids involving cultivar-groups of summer squash, Cucurbita pepo L.

Anido, F.L. and Cravero, V. and Asprelli, P. and et al, . (2004) Heterotic patterns in hybrids involving cultivar-groups of summer squash, Cucurbita pepo L. Euphytica, 135 (3). pp. 355-360.

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Heterotic response for total yield among five cultivar-groups of summer squash, Cocozelle, Vegetable Marrow, Zucchini, Crookneck and Straightneck, was studied in two sets of diallel crosses evaluated in two harvest seasons. Each diallel cross included two representatives of each the five cultivar-groups. Griffing and diallel GGE biplot (genotype main effect and interaction) analyses were carried out. The relative importance of the specific combining ability variance on total variance was greater than that reported earlier for intragroup crosses. Highly significant heterosis was manifested only in combinations of Crooknecks or Straightnecks crossed to Cocozelles, Vegetable Marrows or Zucchinis. GGE biplots showed a consistent arrangement where testers of ssp. texana interacted with cultivars of ssp. pepo and vice versa. We propose that the heterotic pattern of texana-pepo crosses could be potentially used to achieve increased yields in hybrids by introgressing one group into another in a manner that would maintain fruit attributes of the cultivar-group

Item Type: Article
Uncontrolled Keywords: Cucurbita pepo ssp. texana; diallel; genotype and interaction biplot: ssp. pepo
Author Affiliation: Cátedra de Genética, Facultad de Ciencias Agrarias, Universidad Nacional Rosario, S2125 ZAA Zavalla, Argentina
Subjects: Plant Production
Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Other Crops
Depositing User: Ms K Syamalamba
Date Deposited: 10 Jul 2013 05:35
Last Modified: 10 Jul 2013 05:35
Official URL: http://dx.doi.org/10.1023/B:EUPH.0000013373.91446....
URI: http://eprints.icrisat.ac.in/id/eprint/11025

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