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High density SNP and DArT-based genetic linkage maps of two closely related oil palm populations (2017)
Journal Article
Gan, S. T., Wong, W. C., Wong, C. K., Soh, A. C., Kilian, A., Low, E.-T. L., Massawe, F., & Mayes, S. (in press). High density SNP and DArT-based genetic linkage maps of two closely related oil palm populations. Journal of Applied Genetics, https://doi.org/10.1007/s13353-017-0420-7

Oil palm (Elaeis guineensis Jacq.) is an outbreeding perennial tree crop with long breeding cycles, typically 12 years. Molecular marker technologies can greatly improve the breeding efficiency of oil palm. This study reports the first use of the DAr... Read More about High density SNP and DArT-based genetic linkage maps of two closely related oil palm populations.

Microsatellite analysis of populations of the endangered tree Gomortega keule suggests pre-Columbian differentiation (2017)
Journal Article
Munoz-Concha, D., Davey, M. R., Ribas, G., & Mayes, S. (in press). Microsatellite analysis of populations of the endangered tree Gomortega keule suggests pre-Columbian differentiation. New Zealand Journal of Botany, 55(3), https://doi.org/10.1080/0028825X.2017.1343737

Temperate forests have been affected extensively by human activities, resulting in land cover changes and population fragmentation. However, these anthropogenic effects can be superimposed onto the natural history of species, making it difficult to d... Read More about Microsatellite analysis of populations of the endangered tree Gomortega keule suggests pre-Columbian differentiation.

Differential gene expression at different stages of mesocarp development in high- and low-yielding oil palm (2017)
Journal Article
Wong, Y. C., Teh, H. F., Mebus, K., Ooi, T. E. K., Kwong, Q. B., Koo, K. L., Ong, C. K., Mayes, S., Chew, F. T., Appleton, D. R., & Kulaveerasingam, H. (2017). Differential gene expression at different stages of mesocarp development in high- and low-yielding oil palm. BMC Genomics, 18(1), Article 470. https://doi.org/10.1186/s12864-017-3855-7

Background

The oil yield trait of oil palm is expected to involve multiple genes, environmental influences and interactions. Many of the underlying mechanisms that contribute to oil yield are still poorly understood. In this study, we used a micro... Read More about Differential gene expression at different stages of mesocarp development in high- and low-yielding oil palm.

Characterizing haploinsufficiency of SHELL gene to improve fruit form prediction in introgressive hybrids of oil palm (2017)
Journal Article
Teh, C. K., Muaz, S. D., Tangaya, P., Fong, P.-Y., Ong, A. L., Mayes, S., Chew, F. T., Kulaveerasingam, H., & Appleton, D. R. (in press). Characterizing haploinsufficiency of SHELL gene to improve fruit form prediction in introgressive hybrids of oil palm. Scientific Reports, 7(1), https://doi.org/10.1038/s41598-017-03225-7

The fundamental trait in selective breeding of oil palm (Eleais guineensis Jacq.) is the shell thickness surrounding the kernel. The monogenic shell thickness is inversely correlated to mesocarp thickness, where the crude palm oil accumulates. Commer... Read More about Characterizing haploinsufficiency of SHELL gene to improve fruit form prediction in introgressive hybrids of oil palm.

Genomic selection in commercial perennial crops: applicability and improvement in oil palm (Elaeis guineensis Jacq.) (2017)
Journal Article
Kwong, Q. B., Ong, A. L., Teh, C. K., Chew, F. T., Tammi, M., Mayes, S., Kulaveerasingam, H., Yeoh, S. H., Harikrishna, J. A., & Appleton, D. R. (in press). Genomic selection in commercial perennial crops: applicability and improvement in oil palm (Elaeis guineensis Jacq.). Scientific Reports, 7, Article 2872. https://doi.org/10.1038/s41598-017-02602-6

Genomic selection (GS) uses genome-wide markers to select individuals with the desired overall combination of breeding traits. A total of 1,218 individuals from a commercial population of Ulu Remis x AVROS (UR x AVROS) were genotyped using the OP20... Read More about Genomic selection in commercial perennial crops: applicability and improvement in oil palm (Elaeis guineensis Jacq.).

A transcriptomic comparison of two Bambara groundnut landraces under dehydration stress (2017)
Journal Article
Khan, F., Chai, H. H., Ajmera, I., Hodgman, C., Mayes, S., & Lu, C. (2017). A transcriptomic comparison of two Bambara groundnut landraces under dehydration stress. Genes, 8(4), Article 121. https://doi.org/10.3390/genes8040121

The ability to grow crops under low-water conditions is a significant advantage in relation to global food security. Bambara groundnut is an underutilised crop grown by subsistence farmers in Africa and is known to survive in regions of water deficit... Read More about A transcriptomic comparison of two Bambara groundnut landraces under dehydration stress.

Development of gene‐based SSR markers in winged bean (Psophocarpus tetragonolobus (L.) DC.) for diversity assessment (2017)
Journal Article
Wong, Q., Tanzi, A., Ho, W., Malla, S., Blythe, M., Karunaratne, A., Massawe, F., & Mayes, S. (2017). Development of gene‐based SSR markers in winged bean (Psophocarpus tetragonolobus (L.) DC.) for diversity assessment. Genes, 8(3), Article 100. https://doi.org/10.3390/genes8030100

Winged bean (Psophocarpus tetragonolobus) is an herbaceous multipurpose legume grown in hot and humid countries as a pulse, vegetable (leaves and pods), or root tuber crop depending on local consumption preferences. In addition to its different nutri... Read More about Development of gene‐based SSR markers in winged bean (Psophocarpus tetragonolobus (L.) DC.) for diversity assessment.

A cross-species gene expression marker-based genetic map and QTL analysis in bambara groundnut (2017)
Journal Article
Chai, H., Ho, W., Graham, N., May, S., Massawe, F., & Mayes, S. (2017). A cross-species gene expression marker-based genetic map and QTL analysis in bambara groundnut. Genes, 8(3), https://doi.org/10.3390/genes8020084

Bambara groundnut (Vigna subterranea (L.) Verdc.) is an underutilised legume crop, which has long been recognised as a protein-rich and drought-tolerant crop, used extensively in Sub-Saharan Africa. The aim of the study was to identify quantitative t... Read More about A cross-species gene expression marker-based genetic map and QTL analysis in bambara groundnut.

Integrating genetic maps in bambara groundnut [Vigna subterranea (L) Verdc.] and their syntenic relationships among closely related legumes (2017)
Journal Article
Ho, W. K., Chai, H. H., Kendabie, P., Ahmad, N. S., Jani, J., Massawe, F., Kilian, A., & Mayes, S. (2017). Integrating genetic maps in bambara groundnut [Vigna subterranea (L) Verdc.] and their syntenic relationships among closely related legumes. BMC Genomics, 18, Article 192. https://doi.org/10.1186/s12864-016-3393-8

Background

Bambara groundnut [Vigna subterranea (L) Verdc.] is an indigenous legume crop grown mainly in subsistence and small-scale agriculture in sub-Saharan Africa for its nutritious seeds and its tolerance to drought and poor soils. Given that... Read More about Integrating genetic maps in bambara groundnut [Vigna subterranea (L) Verdc.] and their syntenic relationships among closely related legumes.

Identifying seedling root architectural traits associated with yield and yield components in wheat (2017)
Journal Article
Xie, Q., Fernando, K., Mayes, S., & Sparkes, D. L. (in press). Identifying seedling root architectural traits associated with yield and yield components in wheat. Annals of Botany, 119(7), https://doi.org/10.1093/aob/mcx001

Background and Aims: Plant roots growing underground are critical for soil resource acquisition, anchorage and plant-environment interactions. In wheat (Triticum aestivum), however, the target root traits to improve yield potential still remain large... Read More about Identifying seedling root architectural traits associated with yield and yield components in wheat.

Image-based 3D canopy reconstruction to determine potential productivity in complex multi-species crop systems (2017)
Journal Article
Burgess, A. J., Retkute, R., Pound, M. P., Mayes, S., & Murchie, E. H. (2017). Image-based 3D canopy reconstruction to determine potential productivity in complex multi-species crop systems. Annals of Botany, 119(4), 517-532. https://doi.org/10.1093/aob/mcw242

Background and Aims: Intercropping systems contain two or more species simultaneously in close proximity. Due to contrasting features of the component crops, quantification of the light environment and photosynthetic productivity is extremely difficu... Read More about Image-based 3D canopy reconstruction to determine potential productivity in complex multi-species crop systems.

Preanthesis biomass accumulation of plant and plant organs defines yield components in wheat (2016)
Journal Article
Xie, Q., Mayes, S., & Sparkes, D. L. (2016). Preanthesis biomass accumulation of plant and plant organs defines yield components in wheat. European Journal of Agronomy, 81, https://doi.org/10.1016/j.eja.2016.08.007

The preanthesis period in wheat is critical for growth of plant organs including leaves, stems, spikes and roots. However, the roles of the preanthesis biomass accumulation of plant and plant organs in yield determination are only partially elucidate... Read More about Preanthesis biomass accumulation of plant and plant organs defines yield components in wheat.

Construction of a genetic linkage map and QTL analysis in bambara groundnut (2016)
Journal Article
Ahmad, N. S., Redjeki, E. S., Ho, W. K., Aliyu, S., Mayes, K., Massawe, F., Kilian, A., & Mayes, S. (2016). Construction of a genetic linkage map and QTL analysis in bambara groundnut. Genome, 59(7), 459-472. https://doi.org/10.1139/gen-2015-0153

Bambara groundnut (Vigna subterranea (L.) Verdc.) is an indigenous underutilized legume that has the potential to improve food security in semi-arid Africa. So far, there are a lack of reports of controlled breeding populations that could be used for... Read More about Construction of a genetic linkage map and QTL analysis in bambara groundnut.

Genetic diversity and population structure of Bambara groundnut (Vigna subterranea (L.) Verdc.): synopsis of the past two decades of analysis and implications for crop improvement programmes (2016)
Journal Article
Aliyu, S., Massawe, F., & Mayes, S. (2016). Genetic diversity and population structure of Bambara groundnut (Vigna subterranea (L.) Verdc.): synopsis of the past two decades of analysis and implications for crop improvement programmes. Genetic Resources and Crop Evolution, 63(6), 925-943. https://doi.org/10.1007/s10722-016-0406-z

Knowledge of genetic diversity within crop species and the nature of their breeding systems are critical for crop improvement. These determine the appropriate species specific breeding methodologies to deploy. Genetic diversity analysis is an ongoing... Read More about Genetic diversity and population structure of Bambara groundnut (Vigna subterranea (L.) Verdc.): synopsis of the past two decades of analysis and implications for crop improvement programmes.

Use of microsatellite markers for the assessment of bambara groundnut breeding system and varietal purity before genome sequencing (2016)
Journal Article
Ho, W. K., Muchugi, A., Muthemba, S., Kariba, R., Mavenkeni, B. O., Hendre, P., Song, B., Van Deynze, A., Massawe, F., & Mayes, S. (2016). Use of microsatellite markers for the assessment of bambara groundnut breeding system and varietal purity before genome sequencing. Genome, 59(6), 427-431. https://doi.org/10.1139/gen-2016-0029

Maximizing the research output from a limited investment is often the major challenge for minor and underutilized crops. However, such crops may be tolerant to biotic and abiotic stresses and are adapted to local, marginal, and low-input environments... Read More about Use of microsatellite markers for the assessment of bambara groundnut breeding system and varietal purity before genome sequencing.

Development and validation of a high-density SNP genotyping array for African Oil Palm (2016)
Journal Article
Kwong, Q. B., Teh, C. K., Ong, A. L., Heng, H. Y., Lee, H. L., Mohamed, M., Low, J. Z.-B., Apparow, S., Chew, F. T., Mayes, S., Kulaveerasingam, H., Tammi, M., & Appleton, D. R. (2016). Development and validation of a high-density SNP genotyping array for African Oil Palm. Molecular Plant, 9(8), https://doi.org/10.1016/j.molp.2016.04.010

High-density single nucleotide polymorphism (SNP) genotyping arrays are powerful tools that can measure the level of genetic polymorphism within a population. To develop a whole-genome SNP array for oil palms, SNP discovery was performed using deep r... Read More about Development and validation of a high-density SNP genotyping array for African Oil Palm.

Fine-mapping and cross-validation of QTLs linked to fatty acid composition in multiple independent interspecific crosses of oil palm (2016)
Journal Article
Ting, N. C., Yaakub, Z., Kamaruddin, K., Mayes, S., Massawe, F., Sambanthamurthi, R., Jansen, J., Low, L. E. T., Ithnin, M., Kushairi, A., Arulandoo, X., Rosli, R., Chan, K. L., Amiruddin, N., Sritharan, K., Lim, C. C., Nookiah, R., Amiruddin, M. D., & Singh, R. (2016). Fine-mapping and cross-validation of QTLs linked to fatty acid composition in multiple independent interspecific crosses of oil palm. BMC Genomics, 17(1), Article 289. https://doi.org/10.1186/s12864-016-2607-4

Background: The commercial oil palm (Elaeis guineensis Jacq.) produces a mesocarp oil (commonly called ‘palm oil’) with approximately equal proportions of saturated and unsaturated fatty acids (FAs). An increase in unsaturated FAs content or iodine v... Read More about Fine-mapping and cross-validation of QTLs linked to fatty acid composition in multiple independent interspecific crosses of oil palm.

Identification of novel quantitative trait loci for resistance to Fusarium seedling blight caused by Microdochium majus and M. nivale in wheat (2016)
Journal Article
Ren, R., Foulkes, J., Mayes, S., Yang, X., & Ray, R. V. (2016). Identification of novel quantitative trait loci for resistance to Fusarium seedling blight caused by Microdochium majus and M. nivale in wheat. Field Crops Research, 191, 1-12. https://doi.org/10.1016/j.fcr.2016.03.011

Microdochium nivale and Microdochium majus are important causal agents of Fusarium seedling blight (FSB) and Fusarium head blight (FHB) in wheat and other cereals worldwide. A doubled-haploid population derived from a cross between the winter wheat R... Read More about Identification of novel quantitative trait loci for resistance to Fusarium seedling blight caused by Microdochium majus and M. nivale in wheat.

Identification of gene modules associated with low temperatures response in Bambara groundnut by network-based analysis (2016)
Journal Article
Bonthala, V. S., Mayes, S., Moreton, J., Blythe, M. J., Wright, V., May, S., Massawe, F., Mayes, S., & Twycross, J. (2016). Identification of gene modules associated with low temperatures response in Bambara groundnut by network-based analysis. PLoS ONE, 11(2), Article e0148771. https://doi.org/10.1371/journal.pone.0148771

Bambara groundnut (Vigna subterranea (L.) Verdc.) is an African legume and is a promising underutilized crop with good seed nutritional values. Low temperature stress in a number of African countries at night, such as Botswana, can effect the growth... Read More about Identification of gene modules associated with low temperatures response in Bambara groundnut by network-based analysis.