Leaf Rubisco turnover in a perennial ryegrass (Lolium perenne L.) mapping population: genetic variation, identification of associated QTL, and correlation with plant morphology and yield

Khaembah, Edith N.; Irving, Louis J.; Thom, E. R.; Faville, Marty J.; Easton, H. S.; Matthew, C.

doi:10.1093/jxb/ers384

Cited by 19 publications

(17 citation statements)

References 49 publications

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“…A recent paper [48] demonstrated a negative correlation between the maximum leaf Rubisco concentration and plant dry mass in glasshouse grown Lolium perenne plants. A second paper, comparing two long-leaved with two short-leaved L. perenne genotypes, presented evidence that leaf Rubisco content correlated strongly with leaf elongation duration, tiller weight, and leaf elongation rate, with a weaker correlation noted between leaf Rubisco content and plant dry mass [49].…”

Section: Plant Morphology As a Partial Consequence Of Photosynthetic mentioning

confidence: 97%

Carbon Assimilation, Biomass Partitioning and Productivity in Grasses

Irving

2015

Agriculture

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Plant growth correlates with net carbon gain on a whole plant basis. Over the last several decades, the driving factors shaping plant morphology and performance have become increasingly clear. This review seeks to explore the importance of these factors for grass performance. Briefly, these fall into factors influencing photosynthetic rates directly, competition between plants in a canopy, and nutrient status and availability.

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Section: Plant Morphology As a Partial Consequence Of Photosynthetic mentioning

confidence: 97%

Carbon Assimilation, Biomass Partitioning and Productivity in Grasses

Irving

2015

Agriculture

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“…Potential QTL were evaluated if the QTL position was supported by Kruskal-Wallis (KW) nonparametric single-locus analysis (P \ 0.001) and an IM logarithm of odds (LOD) threshold[2.5 (Khaembah et al 2013). Potential QTL were further resolved by selecting the nearest markers to set as cofactors, followed by repeated rounds of multiple QTL mapping (MQM) and cofactor reduction or adjustment.…”

Section: Qtl Analysesmentioning

confidence: 99%

Development of a high-density cranberry SSR linkage map for comparative genetic analysis and trait detection

et al. 2015

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Since its domestication 200 years ago, breeding of the American cranberry (Vaccinium macrocarpon) has relied on phenotypic selection because applicable resources for molecular improvement strategies such as marker-assisted selection (MAS) remain limited. To enable MAS in cranberry, the first high-density SSR linkage map with 541 markers representing all 12 cranberry chromosomes was constructed for the CNJ02-1 progeny from a cross of elite cultivars, CNJ97-105-4 and NJ98-23. The population was phenotyped for a 3-year period for total yield (TY), mean fruit weight (MFW), and biennial bearing index (BBI), and data were analyzed using mixed models and best linear unbiased predictors (BLUPs). Significant differences between genotypes were observed for all traits. Quantitative trait loci (QTL) analyses using BLUPs identified four MFW QTL on three linkage groups (LGs), three TY QTL on three LGs, and one BBI QTL which colocalized with a TY QTL. Local BLAST of a cranberry nuclear genome assembly identified homologous sequences for the mapped SSRs which were then anchored to 12 pseudo-chromosomes using the linkage map information. Analyses comparing coding regions (CDS) anchored in the cranberry linkage map with grape, kiwifruit, and tomato genomes were Electronic supplementary material The online version of this article (

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“…However, the decrease in Rubisco was not observed when perennial ryegrass was provided with high N, indicating a redistribution of resources away from Rubisco. Additionally, recent studies have remarked on the significant variation found in Rubisco quantity and catalytic turnover among and within cool‐season grasses which should also be taken into consideration under conditions of elevated CO 2 concentrations (Ishikawa, Hatanaka, Misoo, & Fukayama, ; Khaembah et al., ).…”

Section: Effects Of Elevated Co2 On Cool‐season Grass Metabolismmentioning

confidence: 99%

Impacts of abiotic stresses on the physiology and metabolism of cool‐season grasses: A review

Loka

Harper

Humphreys

et al. 2018

Food and Energy Security

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Grasslands cover more than 70% of the world's agricultural land playing a pivotal role in global food security, economy, and ecology due to their flexibility and functionality. Climate change, characterized by changes in temperature and precipitation patterns, and by increased levels of greenhouse gases in the atmosphere, is anticipated to increase both the frequency and severity of extreme weather events, such as drought, heat waves, and flooding. Potentially, climate change could severely compromise future forage crop production and should be considered a direct threat to food security. This review aimed to summarize our current understanding of the physiological and metabolic responses of temperate grasses to those abiotic stresses associated with climate change. Primarily, substantial decreases in photosynthetic rates of cool‐season grasses occur as a result of high temperatures, water‐deficit or water‐excess, and elevated ozone, but not CO2 concentrations. Those decreases are usually attributed to stomatal and non‐stomatal limitations. Additionally, while membrane instability and reactive oxygen species production was a common feature of the abiotic stress response, total antioxidant capacity showed a stress‐specific response. Furthermore, climate change‐related stresses altered carbohydrate partitioning, with implications for biomass production. While water‐deficit stress, increased CO2, and ozone concentrations resulted in higher carbohydrate content, the opposite occurred under conditions of heat stress and flooding. The extent of damage is greatly dependent on location, as well as the type and intensity of stress. Fortunately, temperate forage grass species are highly heterogeneous. Consequently, through intra‐ and in particular inter‐specific plant hybridization (e.g., Festuca x Lolium hybrids) new opportunities are available to harness, within single genotypes, gene combinations capable of combating climate change.

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Leaf Rubisco turnover in a perennial ryegrass (Lolium perenne L.) mapping population: genetic variation, identification of associated QTL, and correlation with plant morphology and yield

Cited by 19 publications

References 49 publications

Carbon Assimilation, Biomass Partitioning and Productivity in Grasses

Carbon Assimilation, Biomass Partitioning and Productivity in Grasses

Development of a high-density cranberry SSR linkage map for comparative genetic analysis and trait detection

Impacts of abiotic stresses on the physiology and metabolism of cool‐season grasses: A review

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