Association of Candidate Genes With Submergence Response in Perennial Ryegrass

Wang, Xicheng; Jiang, Yiwei; Zhao, Xing; Song, Xin; Xiao, Xiangshu; Pei, Zhongyou; Liu, Huifen

doi:10.3389/fpls.2017.00791

Cited by 8 publications

(2 citation statements)

References 64 publications

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“…In another study, submergence tolerance was correlated with simple sequence repeat (SSR) markers across all genotypes [152]. Finally, a targeted approach was used, and candidate genes were selected from previous physiological experiments and analyzed for SNPs to be related to submergence tolerance [153]. However, verification of these candidate genes is still required.…”

Section: Flooding Tolerance Of Ryegrassmentioning

confidence: 99%

Improving Flooding Tolerance of Crop Plants

Mustroph

2018

Agronomy

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A major problem of climate change is the increasing duration and frequency of heavy rainfall events. This leads to soil flooding that negatively affects plant growth, eventually leading to death of plants if the flooding persists for several days. Most crop plants are very sensitive to flooding, and dramatic yield losses occur due to flooding each year. This review summarizes recent progress and approaches to enhance crop resistance to flooding. Most experiments have been done on maize, barley, and soybean. Work on other crops such as wheat and rape has only started. The most promising traits that might enhance crop flooding tolerance are anatomical adaptations such as aerenchyma formation, the formation of a barrier against radial oxygen loss, and the growth of adventitious roots. Metabolic adaptations might be able to improve waterlogging tolerance as well, but more studies are needed in this direction. Reasonable approaches for future studies are quantitative trait locus (QTL) analyses or genome-wide association (GWA) studies in combination with specific tolerance traits that can be easily assessed. The usage of flooding-tolerant relatives or ancestral cultivars of the crop of interest in these experiments might enhance the chances of finding useful tolerance traits to be used in breeding.

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Section: Flooding Tolerance Of Ryegrassmentioning

confidence: 99%

Improving Flooding Tolerance of Crop Plants

Mustroph

2018

Agronomy

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“…In order to understand how this resilience is manifested within temperate pasture grasses, a number of studies have looked at the contribution of differential gene expression, usually in leaves and sometimes in roots, in response to various aspects of stress within Lolium and Festuca spp. These studies have involved stresses such as cold-acclimation [ 3 ], xenobiotics [ 4 , 5 ], disease resistance [ 6 ], submergence [ 7 ], salinity [ 8 , 9 ], heavy metals [ 10 , 11 ], as well as water-stress [ 12 – 20 ]. Because of the resources required to conduct and analyse transcriptomics experiments, a common approach is to compare gene expression in pairs of tolerant and susceptible genotypes and then to frame observed differences in terms of how expression profiles may be contributing to the differing responses to stress—and this can provide valuable insights.…”

Section: Introductionmentioning

confidence: 99%

A comparison of shared patterns of differential gene expression and gene ontologies in response to water-stress in roots and leaves of four diverse genotypes of Lolium and Festuca spp. temperate pasture grasses

Thomas

Gasior

et al. 2021

PLoS ONE

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Ryegrasses (Lolium spp.) and fescues (Festuca spp.) are closely related and widely cultivated perennial forage grasses. As such, resilience in the face of abiotic stresses is an important component of their traits. We have compared patterns of differentially expressed genes (DEGs) in roots and leaves of two perennial ryegrass genotypes and a single genotype of each of a festulolium (predominantly Italian ryegrass) and meadow fescue with the onset of water stress, focussing on overall patterns of DEGs and gene ontology terms (GOs) shared by all four genotypes. Plants were established in a growing medium of vermiculite watered with nutrient solution. Leaf and root material were sampled at 35% (saturation) and, as the medium dried, at 15%, 5% and 1% estimated water contents (EWCs) and RNA extracted. Differential gene expression was evaluated comparing the EWC sampling points from RNAseq data using a combination of analysis methods. For all genotypes, the greatest numbers of DEGs were identified in the 35/1 and 5/1 comparisons in both leaves and roots. In total, 566 leaf and 643 root DEGs were common to all 4 genotypes, though a third of these leaf DEGs were not regulated in the same up/down direction in all 4 genotypes. For roots, the equivalent figure was 1% of the DEGs. GO terms shared by all four genotypes were often enriched by both up- and down-regulated DEGs in the leaf, whereas generally, only by either up- or down-regulated DEGs in the root. Overall, up-regulated leaf DEGs tended to be more genotype-specific than down-regulated leaf DEGs or root DEGs and were also associated with fewer GOs. On average, only 5–15% of the DEGs enriching common GO terms were shared by all 4 genotypes, suggesting considerable variation in DEGs between related genotypes in enacting similar biological processes.

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