Epichloë endophyte and plant genotype determine seed production through self-pollination in tall fescue

Zarean, Maryam; Rahimmalek, Mehdi; Mirlohi, Aghafakhr; Davoudi, Marzieh; Ataii, Ehsan

doi:10.1007/s10681-017-2037-7

Cited by 9 publications

(14 citation statements)

References 40 publications

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“…Also, the reports for interaction of endophyte–host genotypes in most growth and storage traits show that endophytic fungi can affect host phenotypic variation (Cheplick, ). The results of this study are also in contrast to the results of Rice, Pinkerton, Stringer, and Undersander () and Zarean et al () who reported that within variation in tall fescue decreased probably due to the masking effect of one single endophyte strain within a plant population. In the present study, it seems that since different collected genotypes of perennial ryegrass have different endophyte strains, and hence, variation among the offspring is raised due to endophyte infection and its interaction with plant genotype.…”

Section: Discussioncontrasting

confidence: 99%

“…For seed‐related characteristics including NSP, SW and SY, Iranian EF populations were more reproductive than both EI populations and the two commercial varieties. This observation in L. perenne is in contrast to those reports which indicate the superiority of EI plants regarding seed production in tall fescue (Rice et al, ; Zarean et al, ). Marks, Clay, and Cheplick () also indicated that EI tall fescues enhanced their competitive ability while in L. perenne the endophyte‐frees were better.…”

Section: Discussioncontrasting

confidence: 99%

“…It also shows that the Iranian ryegrasses have nearly half‐self‐compatibility, and this does not depend on the presence of endophyte directly. This is in contrast to the results reported by Zarean et al () in tall fescue that EF plants could not produce selfed seeds and endophyte infection almost removed self‐incompatibility in some genotypes.…”

Section: Discussioncontrasting

confidence: 99%

“…Mean comparisons for most of the traits including FW and DW showed that there was no significant difference between EI and EF populations in each pollination status. This is while the two TA B L E 3 Analysis of variance for reproductive traits in 10 Iranian and two commercial genotypes of Lolium perenne with and without endophyte in two pollination treatments (Rice et al, 1990;Zarean et al, 2017). Marks, Clay, and Cheplick (1991) also indicated that EI tall fescues enhanced their competitive ability while in L. perenne the endophyte-frees were better.…”

Section: Discussionmentioning

confidence: 91%

“…This system prevents production of seeds through self‐pollination. Zarean, Sabzalian, Mirlohi, Davoodi, and Ataii () reported that the endophyte infection in tall fescue nearly eliminated self‐incompatibility. This endophyte‐mediated self‐fertility may open up a new view to the next generation of tall fescue breeding by concomitant inbreeding and selecting superior plants to improve the population in classical approaches of plant breeding.…”

Section: Introductionmentioning

confidence: 99%

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A simultaneous effect of selfing and Epichloë endophyte on forage, seed yield and turf characteristics of perennial ryegrass (Lolium perenne L.)

Torkian

Rahimmalek

Ehtemam

2019

Grass and Forage Science

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Ryegrass (Lolium perenne L.) is a putative turf and forage plant characterized as mainly outcrossing in which the extent of self‐fertilization and its consequences has not been investigated. In this study, selfed and half‐sib family seeds were obtained from ten clonally propagated ryegrass plants among which two were endophyte‐free (EF) and eight were endophyte‐infected (EI). Then, 20 seed populations plus two commercial varieties of Speedy and Vigor were sown and evaluated in a biennial experiment for their turf and forage characteristics. Selfing caused significant inbreeding depression for plant fresh and dry weight and leaf length and width in the first year for both EI and EF genotypes. In the second year, only leaf length remained depressed among these characters. Also, for the most growth, turf and reproductive traits, EI populations showed less depression. The presence of endophyte in self‐pollinated populations made an increasing effect for the number of seed per spike and days to heading, although seed weight was reduced. Some of the populations derived from self‐pollination and infected with fungal endophyte including S9 and S10 were even superior to the two commercial varieties in terms of both seed production and turf characteristics. However, for seed‐related characteristics including number of spikes per plant, seed weight and seed yield, EF populations including Speedy and Vigor were more reproductive than EI populations. It is concluded that selfing may increase the discrimination between EI and EF ryegrass plants because endophyte infection may mitigate the negative consequences of inbreeding depression in prone populations.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussioncontrasting

confidence: 99%

Section: Discussioncontrasting

confidence: 99%