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Combining ability in diploid and triploid sugarbeet hybrids from diverse parents

AuthorsLasa Dolhagaray, José Manuel ; Romagosa, Ignacio; Hecker, R. J.; Sanz Madoz, José Miguel
KeywordsBeta vulgaris
Issue Date1989
PublisherAmerican Society of Sugar Beet Technologists
CitationJournal of Sugar Beet Research 26: 10-18 (1989)
AbstractAn international cooperative project to develop monogerm sugarbeet (Beta vulgaris L.) hybrids for use in Spain, and potentially in the U.S., involved the development of sugarbeet hybrids between diploid u.S. cytoplasmic male sterile (CMS) monogerm lines and diploid and tetraploid European pollinators. A fixed set of 120 hybrids involving 32 female lines and 15 pollinators were evaluated over six environments. General (GCA) and specific (SCA) combining ability estimates were derived independently for diploid and triploid hybrids. There was a masking effect by tetraploid pollinators on diploid CMS lines. The relative importance of the pollinator vs. the female lines was different in diploid than in triploid hybrids. No significant female GCAs were detected for the triploid hybrids, whereas, GCA estimates for the same CMS lines in diploid hybrids were generally significant. Higher environmental stability was detected among triploid than among diploid hybrids. The use of public monogerm eMS lines crossed to open-pollinated pollinators was found to be an acceptable way to readily start a monogerm sugarbeet hybrid breeding program.
Description9 Pags.- 4 Tabls.
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