Inter-morphotype hybridization in tall fescue (Festuca arundinacea Schreb.): exploration of meiotic irregularities and potential for breeding
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F19%3A00504561" target="_blank" >RIV/61389030:_____/19:00504561 - isvavai.cz</a>
Result on the web
<a href="http://doi.org/10.1007/s10681-019-2419-0" target="_blank" >http://doi.org/10.1007/s10681-019-2419-0</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10681-019-2419-0" target="_blank" >10.1007/s10681-019-2419-0</a>
Alternative languages
Result language
angličtina
Original language name
Inter-morphotype hybridization in tall fescue (Festuca arundinacea Schreb.): exploration of meiotic irregularities and potential for breeding
Original language description
The Continental morphotype of tall fescue is one of the main forage and turf grass species. However, it suffers from summer drought, especially in dry and hot climates. On the other hand, the Mediterranean morphotype of tall fescue display summer dormancy. Hybridization of the two morphotypes seems to be an efficient way to introgress summer dormancy from Mediterranean morphotypes into elite cultivars of the Continental morphotype. In this study, we performed a series of reciprocal crosses producing F1 hybrids. Phenotyping revealed heterosis for plant height, fresh weight and dry matter yield, with hybrids generally outscoring parental genotypes. On the other hand, F1 hybrids had reduced fertility and lower seed set. This was a consequence of meiotic irregularities. Both parental morphotypes carry chromosome pairing regulators responsible for diploid-like behavior in meiosis. However, it is clear from this study that the regulators from the two morphotypes are not compatible. We observed high frequency of multivalent formation and homoeologous chromosome pairing in F1 hybrids. Molecular and cytogenetic analyses indicate high level of genome differentiation between both morphotypes. This might be caused either by massive genome reshuffling during the evolution or, most likely, by origination of the two morphotypes from different parental species. As such, introgression-form of breeding involving several rounds of backcrosses resulting in the restoration of chromosome pairing regulator (at least in some plants) appears to be the only way to achieve stability of the hybrid genomes and thus, wider utilization of genetically stable and fertile hybrid tall fescue for forage and turf.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10608 - Biochemistry and molecular biology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Euphytica
ISSN
0014-2336
e-ISSN
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Volume of the periodical
215
Issue of the periodical within the volume
5
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
17
Pages from-to
97
UT code for WoS article
000465138400001
EID of the result in the Scopus database
2-s2.0-85064574307