Inbred progeny of tall fescue infected with Epichloë fungal endophyte have a high defence compound content and no depression in seed set

Inbred progeny of tall fescue infected with Epichloë fungal endophyte have a high defence compound content and no depression in seed set

ABSTRACT Substantial evidence is available on the capacity of particular strains of Epichloë fungal endophyte to remove the barriers of self‐pollination in host grasses. We hypothesized that this might open up new methods to obtain inbred lines for specific turf hybrids and genetic studies. In the p...

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Bibliographic Details
Published in:Plant biology (Stuttgart, Germany) Vol. 24; no. 5; pp. 827 - 835
Main Authors: Raahbar, A., Sabzalian, M. R., Mirmohammady Maibody, S. A. M., Zarean, M., Pastor, V.
Format: Journal Article
Language:English
Published: England Wiley Subscription Services, Inc 01-08-2022
Subjects:
Biosynthesis
Chlorogenic acid
Cloning
Coumaric acid
Crop yield
Cultivars
Endophyte
Endophytes
Epichloë
Flavonoids
Fungi
Genotypes
Grasses
Hybrids
inbred line
Inbreeding
Lolium arundinaceum
Offspring
Phenolic compounds
Phenols
Plant reproduction
Pollination
Progeny
Rutin
Seed set
Seeds
self‐pollination
Sheaths
tall fescue
Turf
Endophyte
self-pollination
inbred line
Epichloë
tall fescue
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Summary:ABSTRACT Substantial evidence is available on the capacity of particular strains of Epichloë fungal endophyte to remove the barriers of self‐pollination in host grasses. We hypothesized that this might open up new methods to obtain inbred lines for specific turf hybrids and genetic studies. In the present study, we evaluated the first generation of self‐pollination derived plants of endophyte infected clones (EIS1) from putative genotypes 75B+ and 75C+ and those from the first generation of self‐pollination in six commercial tall fescue clones plus their hybrids with 75B− and 75C− for growth, seed yield and polyphenolic content as an index for biosynthesis of defence compounds under field conditions. The results showed that EIS1 had high hyphal density within leaf sheaths and higher growth and seed‐related traits in at least one genotype. There were higher amounts of flavonoid and phenolic compounds (up to twofold) in both genotypes than in their hybrid counterparts and endophyte‐free progeny. Selected genotypes within EIS1 contained significantly more chlorogenic acid, p‐coumaric acid and rutin than the best non‐infected genotypes. We conclude that phenotypic selection of individuals from the S1 population is feasible for improving fitness and stress resistance in novel inbred lines of tall fescue for development of new turf cultivars with the desired ecophysiological traits. Self‐pollination derived progenies of Epichloë‐infected clone of 75B+ were superior over those of cross‐pollinated counterparts regarding growth and seed yield and phytochemical content.
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ISSN:1435-8603
1438-8677
DOI:10.1111/plb.13422