Population-based diallel analyses among nine historically recognized alfalfa germplasms

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
A Segovia-LermaI M Ray

Abstract

Identification of heterotic groups and patterns among breeding populations provides fundamental information to help plant breeders more knowledgeably manipulate heterosis. A diallel analysis was conducted among nine alfalfa ( Medicago sativa L.) germplasms, commonly referred to as African, Chilean, Flemish, Indian, Ladak, M. falcata, M. varia, Peruvian, and Turkistan, which represent a significant proportion of the genetic diversity present in US cultivars. Heterotic responses were determined by evaluating forage yield of the germplasms and their 36 half-diallel hybrids in seeded plots that were harvested five times in each of 2 years. Commercially acceptable yields were obtained from some hybrids of unimproved parents, where at least one parent was adapted to the study environment. Variation among crosses was attributed primarily to general combining ability (GCA) effects; however, specific combining ability effects were also significant. GCA estimates for African, Chilean and Peruvian were positive, while those for Ladak, M. falcata, and M. varia were negative. Estimates for variety heterosis effects were positive for Peruvian and M. falcata and negative for Indian and M. varia. Significant mid-parent heterosis [(MPH) range o...Continue Reading

References

Apr 3, 2003·Genome Génome / Conseil National De Recherches Canada·A Segovia-LermaI M Ray

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Citations

Aug 3, 2005·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·M K SledgeG Jiang
Aug 7, 2007·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·I J Maureira-ButlerT C Osborn
Aug 16, 2011·The Plant Journal : for Cell and Molecular Biology·Yun KangMichael Udvardi
Aug 18, 2017·PloS One·Michele Jorge da SilvaRafael Augusto da Costa Parrella
Jan 27, 2019·Genetics·Nicholas SantantonioMark Sorrells
Mar 1, 2019·G3 : Genes - Genomes - Genetics·Nicholas SantantonioMark Sorrells

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