Potato Germplasm Enhancement Enters the Genomics Era

Bethke, Paul C.; Halterman, Dennis; Jansky, Shelley

doi:10.3390/agronomy9100575

Cited by 42 publications

(49 citation statements)

References 148 publications

(172 reference statements)

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“…If an oligogenic-like inheritance confirms and upon QTL validation, specific markers to retrieve the haplotypes conferring resistance to common scab can be screened in breeding populations to perform early selection (Bradshaw, 2017). Progress of MAS in potato is relatively slow when compared to diploid, inbred species, and needs to take into consideration several aspects in addition to the genetic architecture of a trait, such as polyploidy, high heterozygosity, and clonal propagation (Slater et al, 2014; Bethke et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

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Quantitative trait locus mapping for common scab resistance in a tetraploid potato full-sib population

Pereira¹,

Mollinari

et al. 2020

Preprint

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Despite the negative impact of common scab (Streptomyces spp.) to the potato industry, little is known about the genetic architecture of resistance to this bacterial disease in the crop. We evaluated a mapping population (~150 full-sibs) derived from a cross between two tetraploid potatoes ('Atlantic' × B1829-5) in three environments (MN11, PA11, ME12) under natural common scab pressure. Three measures to common scab reaction were assessed, namely percentage of scabby tubers, and disease area and lesion indices, which were highly correlated (>0.76). Due to large environmental effect, heritability values were zero for all three traits in MN11, but moderate to high in PA11 and ME12 (0.44~0.79). We identified a single quantitative trait locus (QTL) for lesion index in PA11, ME12 and joint analyses on linkage group 3, explaining 22~30% of the total variation. The identification of QTL haplotypes and candidate genes contributing to disease resistance can support genomics-assisted breeding approaches.

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Section: Discussionmentioning

confidence: 99%

“…Due to the autotetraploidy of potato (2 n = 4 x = 48), such a recessive locus would have to appear as in a quadruplex recessive state, which is not easy to achieve using conventional breeding (Bradshaw, 2017). In this sense, marker-assisted selection (MAS) could facilitate recessive allele introgression (Bethke et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Quantitative trait locus mapping for common scab resistance in a tetraploid potato full-sib population

Pereira¹,

Mollinari

et al. 2020

Preprint

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“…The most effective strategies to control bacterial soft rot in potato crops are the application of sanitation measures and enhancement of potato resistance, while chemical control is seldom used for these bacterial diseases. However, there are few highly resistant commercial potato cultivars, and the complexity of the inheritance of resistance to soft rot bacteria makes breeding potato cultivars with high levels of resistance difficult (Bethke et al 2019; Charkowski et al 2020). To date, there is no evidence of any species/strain–specific resistance of potato to soft rot bacteria.…”

Section: Introductionmentioning

confidence: 99%

QTLs for potato tuber resistance toDickeya solaniare located on chromosomes II and IV

Lebecka

Śliwka

Grupa-Urbańska

et al. 2021

Preprint

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Soft rot is a bacterial disease that causes heavy losses in potato production worldwide. The goal of this study was to identify quantitative trait loci (QTLs) for potato tuber resistance to bacterium Dickeya solani and for tuber starch content to study the relationship between these traits. A highly resistant diploid hybrid of potato was crossed with a susceptible hybrid to generate the F1 mapping population. Tubers that were wound-inoculated with bacteria were evaluated for disease severity expressed as the mean weight of rotted tubers, and disease incidence measured as the proportion of rotten tubers. Diversity array technology (DArTseq) was used for genetic map construction and QTLs analysis. The most prominent QTLs for disease severity and incidence were identified in overlapping regions on potato chromosome IV and explained 22.4% and 22.9% of the phenotypic variance, respectively. The second QTL for disease severity was mapped to chromosome II and explained 16.5% of the variance. QTLs for starch content were detected on chromosomes III, V, VI, VII, VIII, IX, XI, and XII in regions different than the QTLs for soft rot resistance. Two strong and reproducible QTLs for resistance to Dickeya solani on potato chromosomes IV and II might be useful for further study of candidate genes and marker development in potato breeding programs. The relationship between tuber resistance to bacteria and the starch content in potato tubers was not confirmed by QTL mapping, which makes the selection of genotypes highly resistant to soft rot with a desirable starch content feasible.

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“…In recent decades, several technologies have been applied to potato breeding that promise to accelerate the process of unlocking the genetic diversity in potato, such as genetic engineering, molecular marker technology, cis-genesis, and more recently gene editing (Jansky et al 2016;Bethke et al 2019). This article focuses on the governance of genetic resources in the context of another technological innovation: hybrid diploid potato breeding.…”

Section: Introductionmentioning

confidence: 99%

Innovation and the commons: lessons from the governance of genetic resources in potato breeding

Beumer

Stemerding²,

Swart

2020

Agric Hum Values

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This article explores the relation between innovation and resources that are governed as commons by looking at the governance of potato genetic resources, especially in the context of the emergence of hybrid diploid potato breeding that will enable potato propagation through true seeds. As a new breeding tool, hybrid diploid potato breeding may not only revolutionize traditional potato breeding practices, it may also strongly affect current governance modes of potato genetic resources as a commons. Contrary to conventional accounts of the commons that treat technological innovation mainly as an exogenous factor, we argue that technological innovation can better be understood as an endogenous factor. In particular, we develop a co-production framework of innovation and the commons that draws attention to the different ways in which innovation, commons and its governance interact. Using this framework, we demonstrate that the constitution of potato genetic resources as a commons cannot be understood without considering the various ways in which technological innovation affects resources and mediate how these are governed. While reversely, technological innovations themselves are also enabled and constrained by users who govern potato genetic resources as a shared resource. We argue that changes in the governance of genetic resources can be understood as a change from one socio-technical constellation to another, whereby innovations, resources, and institutions are continuously co-produced.

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Potato Germplasm Enhancement Enters the Genomics Era

Cited by 42 publications

References 148 publications

Quantitative trait locus mapping for common scab resistance in a tetraploid potato full-sib population

Quantitative trait locus mapping for common scab resistance in a tetraploid potato full-sib population

QTLs for potato tuber resistance toDickeya solaniare located on chromosomes II and IV

Innovation and the commons: lessons from the governance of genetic resources in potato breeding

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