Genetic resistance to <i>Phytophthora lateralis</i> in Port‐Orford‐cedar (<i>Chamaecyparis lawsoniana</i>) – Basic building blocks for a resistance program

Sniezko, Richard A.; Johnson, Jeremy S.; Reeser, Paul; Kegley, Angelia; Hansen, E. M.; Sutton, Wendy; Savin, Douglas P.

doi:10.1002/ppp3.10081

Cited by 17 publications

(15 citation statements)

References 35 publications

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“…Within the context of these inoculation trials, the ʻŌDRP will also examine the effects of temperature and season on infection rates and disease progression to inform optimal timing for inoculating and experiment duration. This information is vital for fine-tuning screening methods and avoiding experiments that are too short to distinguish types of resistance or capture intermediate levels of resistance (Sniezko et al 2020). In vitro experiments of C. lukuohia cultures demonstrate that mycelial growth and sporulation are optimal at 25 °C and quickly diminish at temperatures ≤ 20 °C or ≥ 35 °C .…”

Section: Inoculation Methodologymentioning

confidence: 99%

“…Understanding the genetic basis and host defense mechanisms in a given pathosystem can aid in the development of potentially durable, long-lasting resistance (Carson and Carson 1989). Host resistance to disease can manifest in the form of major gene resistance (MGR), often conferred by a single dominant gene, or quantitative disease resistance (QDR), resistance conferred by multiple genes (Woodcock et al 2018;Sniezko et al 2020). MGR confers complete resistance to a disease, but when it is overcome by a pathogen, all of the previously resistant individuals become susceptible (Kinloch et al 2004).…”

Section: Understanding Mechanisms Of Rod Resistancementioning

confidence: 99%

“…QDR confers partial resistance to a disease and is harder for a pathogen to overcome. These types of resistance are not exclusive; it is possible for a host to express both MGR and QDR (Vigoroux and Olivier 2004;Sniezko et al 2014Sniezko et al , 2020. A common resistance mechanism in Ceratocystis pathosystems generally involves the occlusion of the pathogen within the xylem by the rapid production of tyloses, phenolic compounds, and other defense compounds, as seen in resistance responses of mango (Mangifera indica L.; Araujo et al 2014a;Araujo et al 2014b) and Eucalyptus urophylla × E. grandis hybrids (Silva et al 2020) to Ceratocystis fimbriata infection.…”

Section: Understanding Mechanisms Of Rod Resistancementioning

confidence: 99%

“…resistance to Dutch elm disease (Martín et al 2019), Port-Orford-cedar (Chamaecyparis lawsoniana (A. Murray bis) Parl.) resistance to Phytophthora lateralis Tucker and Milbrath (Sniezko et al 2012(Sniezko et al , 2020, Sitka spruce (Picea sitchensis [Bong.] Carr) resistance to white pine weevil (Pissodes strobi Peck; Alfaro et al 2013), and pine (Pinus spp.)…”

Section: Introductionmentioning

confidence: 99%

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A framework for establishing a rapid ‘Ōhi‘a death resistance program

Luiz¹,

Giardina²,

Keith

et al. 2022

New Forests

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Metrosideros polymorpha Gaud. (‘ōhi‘a) is the most abundant native forest tree in Hawai‘i and a keystone species of cultural, ecological, and economic importance. ‘Ōhi‘a forests, particularly on Hawaiʻi Island, are being severely impacted by Rapid ‘Ōhi‘a Death (ROD), which is caused by the fungal pathogens Ceratocystis lukuohia and C. huliohia. ROD is characterized by branch dieback, crown wilting, and mortality. Initial disease resistance screening of four varieties of M. polymorpha with C. lukuohia demonstrated that varieties may differ in susceptibility. Several survivors of field or screening-based infections still exist, providing strong impetus for the establishment of the ‘Ōhiʻa Disease Resistance Program (ʻŌDRP). Here, we outline a framework for guiding the ʻŌDRP throughout the process of identifying and developing ROD resistance in M. polymorpha and, possibly, all Hawaiian Metrosideros species. Core ʻŌDRP projects include: (1) evaluating and operationalizing methods for greenhouse-based production and screening of test plants; (2) greenhouse screening of seedlings and rooted cuttings sampled from native Metrosideros throughout Hawaiʻi; (3) establishing field trials to validate results from greenhouse assays; (4) understanding environmental and genetic drivers of resistance to characterize the durability of resistance to ROD; (5) developing remote sensing and molecular methods to rapidly detect ROD-resistant individuals; and (6) conducting breeding trials to improve the degree and durability of ROD resistance. Ultimately, the ʻŌDRP seeks to produce ROD-resistant material for the perpetuation of M. polymorpha across Hawai‘i, with the goal of preserving the ecology, culture, and communities that are dependent on this tree species.

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Section: Inoculation Methodologymentioning

confidence: 99%

Section: Understanding Mechanisms Of Rod Resistancementioning

confidence: 99%

Section: Understanding Mechanisms Of Rod Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A framework for establishing a rapid ‘Ōhi‘a death resistance program

Luiz¹,

Giardina²,

Keith

et al. 2022

New Forests

Self Cite

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“…For both species, resistant lines have been used in reforestation for decades (Sniezko et al 2016). The Phytophthora lateralis resistance program also shows promise to help stabilize Port Orford cedar (Chamaecyparis lawsoniana) in its native range of north-western California and southwestern Oregon, USA (Sniezko et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Quambalaria shoot blight resistance in marri (Corymbia calophylla): genetic parameters and correlations between growth rate and blight resistance

Duong

Mazanec²,

McComb

et al. 2022

Tree Genetics & Genomes

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Quambalaria shoot blight (QSB) has emerged recently as a severe disease of Corymbia calophylla (marri). In this study, QSB damage and growth were assessed in Corymbia calophylla trees at 4 and 6 years of age in two common gardens consisting of 165 and 170 open-pollinated families representing 18 provenances across the species’ natural distribution. There were significant differences between provenances for all traits. The narrow-sense heritability for growth traits and QSB damage at both sites were low to moderate. The genetic correlation between QSB damage and growth traits was negative; fast-growing families were less damaged by QSB disease. Age-age genetic correlations for individual traits at four and six years were very strong, and the type-B (site–site) correlations were strongly positive for all traits. Provenances from cooler wetter regions showed higher resistance to QSB. The QSB incidence at 6 years was significantly correlated with environmental factors of the provenance’s origin. The QSB incidence at years four and six was not correlated with the QSB expression in 3-month-old seedlings. Based on these results, selection for resistance could be undertaken using 4-year-old trees. There is potential for a resistance breeding program to develop populations of marri genetically diverse and resistant to QSB.

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