Inter-morphotype hybridization in tall fescue (Festuca arundinacea Schreb.): exploration of meiotic irregularities and potential for breeding

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Inter-morphotype hybridization in tall fescue (Festuca arundinacea Schreb.): exploration of meiotic irregularities and potential for breeding

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Inter-morphotype hybridization in tall fescue (Festuca arundinacea Schreb.): exploration of meiotic irregularities and potential for breeding

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10608 - Biochemistry and molecular biology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Euphytica

ISSN

0014-2336

e-ISSN

—

Svazek periodika

215

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

17

Strana od-do

97

Kód UT WoS článku

000465138400001

EID výsledku v databázi Scopus

2-s2.0-85064574307