Combining Drought Survival via Summer Dormancy and Annual Biomass Productivity in Dactylis glomerata L.

Kallida, Rajae; Zhouri, Latifa; Volaire, Florence; Guérin, Adrien; Julier, Bernadette; Shaimi, Naima; Fakiri, Malika; Barré, Philippe

doi:10.3389/fpls.2016.00082

Cited by 15 publications

(12 citation statements)

References 45 publications

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“…The low forage productivity of many summer-dormant populations is a disincentive to adoption of cultivars with this trait, even though the superior persistence of these plants provides some compensation to this drawback. In this context, the recent publication of research exploring the possibility of breaking this trade-off is timely (Kallida et al 2016). Even though these researchers observed that high summer dormancy was negatively correlated with annual biomass production (−0.34, P < 0.005), they did note that some progeny had both high dormancy and high productivity indicating the potential to break this trade-off.…”

Section: Summer Dormancy To Improve Survival Of Extended Extreme Dromentioning

confidence: 99%

Plant drought survival under climate change and strategies to improve perennial grasses. A review

Norton¹,

Malinowski²,

Volaire

2016

Agron. Sustain. Dev.

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The three cool-season perennial forage grasses cocksfoot/orchardgrass, Dactylis glomerata L., tall fescue, Festuca arundinacea Schreb. syn. Lolium arundinaceum (Schreb.) Darbysh., and phalaris/harding grass, Phalaris aquatica L., are of major economic and ecological importance in regions with summer-dry environments. This review considers the constraints that these species are likely to experience under current and predicted increase of droughts due to climate change scenarios in south-eastern Australia, the southern Great Plains of USA and the Western Mediterranean Basin. The review identifies research required to maximise the development and use of C3 cool-season grasses with enhanced resilience to drought while considering the concern of some regulators that these grasses may be potential weeds. The state of knowledge of factors influencing plant drought survival and therefore recovery after stress and long-term persistence is discussed in the light of adaptive strategies. The major research needs identified to enhance traits conferring drought survival include (1) increasing the depth and density of grass root systems to strengthen dehydration avoidance; (2) exploring the biochemical, molecular and hydraulic bases of dehydration tolerance and improving techniques to measure this trait; (3) breaking the trade-off between summer dormancy and forage yield potential and improving understanding of environmental, biochemical and genetic controls over summer dormancy; (4) identifying non-toxic endophyte strains compatible with summer-dormant cultivars of tall fescue to enhance drought survival; and (5) enhancing seed production capability of new cultivars as well as the development of agronomic management packages for promoting stable mixtures combining perennial grasses and legumes. The weed potential of newly introduced summer-dormant cultivars is concluded to be minor. The research directions proposed here should improve pasture grass resilience and forage crop sustainability in Mediterranean and temperate summer-dry environments under the future drier and warmer conditions associated with climate change.

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Section: Summer Dormancy To Improve Survival Of Extended Extreme Dromentioning

confidence: 99%

Plant drought survival under climate change and strategies to improve perennial grasses. A review

Norton¹,

Malinowski²,

Volaire

2016

Agron. Sustain. Dev.

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“…Such pseudo F 1 / F 2 populations have been genotyped and phenotyped to identify QTL for several agronomical and physiological traits in L. perenne ( Muylle et al , 2005 ; Barre et al , 2009 ), L. multiflorum ( Studer et al , 2007 ), F. pratensis ( Ergon et al , 2006 ; Alm et al , 2011 ), tall fescue ( Festuca arundinacea ) ( Saha et al , 2009 ) and cock’s-foot ( Dactylis glomerata ) ( Kallida et al , 2016 ; Zhao et al , 2016 ). Because single F 1 plants cannot be selfed, pseudo-test crosses or full-sib matings of F 1 plants have been widely employed to construct pseudo-backcross or pseudo- F 2 populations.…”

Section: Practical Applications Of Sc In Forage Grassesmentioning

confidence: 99%

Characterization and practical use of self-compatibility in outcrossing grass species

et al. 2021

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Background Self-incompatibility (SI) systems prevent self-fertilisation in several species of Poaceae, many of which are economically important forage, bioenergy and turf grasses. SI ensures cross-pollination and genetic diversity but restricts the ability to fix useful genetic variation. In most inbred crops, it is possible to develop high performing homozygous parental lines by self-pollination which then enables the creation of F1 hybrid varieties with higher performance, a phenomenon known as heterosis. The inability to fully exploit heterosis in outcrossing grasses is partially responsible for lower levels of improvement in breeding programmes compared to inbred crops. However, SI can be overcome in forage grasses to create self-compatible populations. This is generating interest in understanding the genetical basis of self-compatibility (SC), its significance for reproductive strategies and its exploitation for crop improvement, especially in the context of F1 hybrid breeding. Scope We review the literature on SI and SC in outcrossing grass species. We review the currently available genomic tools and approaches used to discover and characterise novel SC sources. We discuss opportunities barely explored for outcrossing grasses that SC facilitates. Specifically, we discuss strategies for wide SC introgression in the context of the Lolium-Festuca complex and the use of SC to develop immortalised mapping populations for the dissection of a wide range of agronomically important traits. The germplasm available is a valuable practical resource and will aid understanding of the basis of inbreeding depression and hybrid vigour in key temperate forage grass species. Conclusions A better understanding of the genetic control of additional SC loci offers new insight into SI systems, their evolutionary origins and reproductive significance. Heterozygous outcrossing grass species that can be readily selfed facilitate studies of heterosis. Moreover, SC introduction into a range of grass species will enable heterosis to be exploited in innovative ways in genetic improvement programmes.

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“…This in general might be true as pleiotropy is the predominant cause of trait association over linkage 31 . A negative correlation between summer dormancy and vegetative productivity was observed by Shaimi et al 28 and Kallida et al 27 , however they described the correlation as environmental adaptation rather than genetic control.…”

Section: Resultsmentioning

confidence: 88%

“…Thus, transgressive segregation in a population is highly likely which is useful for QTL mapping 26 . In summer dormancy related traits, it was reported in D. glomerata 27,28 . In this study, we find that summer dormancy is not only imbedded in the 103-2, but the Continental parent also contributes alleles.…”

Section: Resultsmentioning

confidence: 98%

Mapping QTL for summer dormancy related traits in tall fescue (Festuca arundinacea Schreb.)

Talukder

Bhamidimarri

Chekhovskiy

et al. 2020

Sci Rep

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Summer dormancy is an important stress avoidance mechanism of cool season perennial grasses to persist well under harsh summer conditions. QtL associated with summer-dormancy related traits in tall fescue has significant breeding implications. An F 1 pseudo testcross population was developed by crossing a Mediterranean (103-2) to a Continental parent (R43-64). The population was genotyped using 2,000 SSR and DArT markers. Phenotyping was done in growth chambers and in two Oklahoma, USA locations. Total length of R43-64 and 103-2 maps were 1,956 cM and 1,535 cM, respectively. Seventy-seven QTL were identified in the male and 46 in the female parent maps. The phenotypic variability explained by the QTL ranged between 9.91 and 32.67%. Among all the QTL, five summer dormancy related putative QTL were identified in R43-64 linkage groups (LGs) 4, 5, 12, 20 and 22 and two in 103-2 LGs 5 and 17. All the putative summer dormant QTL regions in male map showed pleiotropic responses and epistatic interactions with other summer dormant and stress responsive QTL regions for plant height, new leaf and dry biomass weight. The flanking markers related to the QTL reported in this study will be useful to improve tall fescue persistence in dry areas through marker-assisted breeding. Summer dormancy is a phenomenon, which is endogenously controlled and coupled with series of processes including growth reduction, cessation and/or senescence under non-limiting moisture conditions during summer 1. It is an important drought avoidance mechanism of cool season perennial grasses in the Mediterranean climates to survive under harsh summer conditions 2. Summer dormancy had been reported in many grass species, i.e., Poa secunda J. Presl [syn. Poa scabrella (Thurb.) Benth. ex Vasey] 3 , Poa bulbosa L. 4 , Hordeum bulbosum L. 5 , orchardgrass (Dactylis glomerata L.) 6 , hardinggrass (Phalaris aquatica L.) 7 and tall fescue [Festuca arundinacea (Schreb.) S.J. Darbysh.] 8. Tall fescue is an important perennial, cool-season forage and turf grass in the United States 9 belongs to the genus 'Festuca' under Poaceae family 10,11. It is a cross-pollinated allohexaploid grass. Tall fescue has three distinct morphotypes, and those mainly used as forage belong to the Continental and Mediterranean groups. These two morphotypes might have differences in genomic constitution 12-14. Sleper and West 15 reported that the genomic constitution of Continental tall fescue is PPG1G1G2G2, while that of the Mediterranean fescue is still unresolved 9,11,14,16,17. Continental morphotype is summer active and winter hardy. Mediterranean morphotype exhibits incomplete summer dormancy, greater growth during fall but lacks winter hardiness 18,19. In the southern great plains, the persistence and productivity of cool season perennial grasses are significantly affected by hot and dry summer 20,21. Thus, understanding and utilization of summer dormancy mechanism in tall fescue could help in developing suitable cultivars for the region. The induction and exhibition of summer dor...

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Combining Drought Survival via Summer Dormancy and Annual Biomass Productivity in Dactylis glomerata L.

Cited by 15 publications

References 45 publications

Plant drought survival under climate change and strategies to improve perennial grasses. A review

Plant drought survival under climate change and strategies to improve perennial grasses. A review

Characterization and practical use of self-compatibility in outcrossing grass species

Mapping QTL for summer dormancy related traits in tall fescue (Festuca arundinacea Schreb.)

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