Number of the records: 1  

Triploid forage grass hybrids Festuca apennina × F. pratensis display extraordinary heterosis for yield characteristics

  1. 1.
    0532723 - ÚEB 2021 RIV NL eng J - Journal Article
    Boller, B. - Kopecký, David
    Triploid forage grass hybrids Festuca apennina × F. pratensis display extraordinary heterosis for yield characteristics.
    Euphytica. Roč. 216, č. 9 (2020), č. článku 143. ISSN 0014-2336. E-ISSN 1573-5060
    R&D Projects: GA ČR(CZ) GA20-10019S; GA MŠMT(CZ) EF16_019/0000827
    Institutional support: RVO:61389030
    Keywords : Alpine sward * Festuca * Forage * Heterosis * Triploid hybrid
    OECD category: Genetics and heredity (medical genetics to be 3)
    Impact factor: 1.895, year: 2020
    Method of publishing: Open access
    http://doi.org/10.1007/s10681-020-02680-0

    Hybrid vigor (or heterosis) is the over-performance of a hybrid over its parents in a specific trait or a set of traits. As such, hybrid breeding serves as a tool to efficiently trigger gains in breeding programs. Moreover, hybrids of genetically distant landraces, varieties or even species may become evolutionary successful. In Swiss alpine swards, we observed frequent prevalence of triploid hybrids of Festuca pratensis × F. apennina with outstanding competitiveness relative to their parental species in the sites of sympatric occurrence. Observations of these highly vigorous hybrids prompted the study on their heterosis across various environmental conditions. Phenotypic observations during 3 years at four locations at different altitudes (from 200 to 1850 m a.s.l.) have shown significant heterosis for dry biomass production at all sites during the first and second year, and at the mid- and high altitude sites also in the third year. At mid-altitude (1000 m a.s.l.), heterosis increased steadily and reached a maximum of + 508% for annual yield (+ 626% for a single cut) in the third year. This is by far the highest value of heterosis ever reported for annual dry matter yield of a forage grass. Further utilization of triploid hybrids in forage grass breeding is hampered by their sterility. Hence there is a need for vegetative propagation. However, artificial chromosome doubling of triploids to create fertile hexaploids, or seeking ways to propagate them vegetatively at an industrial scale might overcome this limitation.
    Permanent Link: http://hdl.handle.net/11104/0311135

     
    FileDownloadSizeCommentaryVersionAccess
    2020_Boller_Euphytica_143.pdf11.4 MBOtheropen-access
     
Number of the records: 1  

  This site uses cookies to make them easier to browse. Learn more about how we use cookies.