dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:19:48Z
dc.date.available2014-05-20T13:19:48Z
dc.date.created2014-05-20T13:19:48Z
dc.date.issued2004-03-01
dc.identifierScientia Agricola. Piracicaba: Univ Sao Paolo, v. 61, n. 2, p. 224-227, 2004.
dc.identifier0103-9016
dc.identifierhttp://hdl.handle.net/11449/5322
dc.identifier10.1590/S0103-90162004000200016
dc.identifierS0103-90162004000200016
dc.identifierWOS:000225443300016
dc.identifierWOS000225443300016.pdf
dc.description.abstractThe strategy for breeding F-1 hybrid squash is to develop parental lines through self-pollination. However, it increases plant mean homozygosis, which is not the natural genetic state of a cross-pollinated species, and can cause inbreeding depression. The objective of this work was to evaluate this depression with sucessive generations of self-pollination (without selection) in Cucurbita moschata, cv. Piramoita. Populations were obtained from lines with one to four generations of self-pollination (obtained by the SSD method), from the original cv. Piramoita (population SO). Randomized blocks were used with five treatments (different generations of self-pollination -S-0 to S-4), six replicates and five plants per plot. Regression analysis was made by the Wright inbreeding coefficient (F) to measure the homozygosis level effect on vigor loss. There was a linear reduction of mean weight and fruit length, seed production (number and weight) per fruit with the increase of the homozygosis level; however inbreeding did not affect seed quality (weight of 100 seeds and germination).
dc.languageeng
dc.publisherUniversidade de São Paulo (USP)
dc.relationScientia Agricola
dc.relation0,578
dc.rightsAcesso aberto
dc.sourceWeb of Science
dc.subjectCucurbita moschata
dc.subjectcucurbits
dc.subjectselfing
dc.titleDepression by inbreeding after four sucessive self-pollination squash generations
dc.typeArtículos de revistas


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