Genetically based resistance of black spruce (Picea mariana) to the yellowheaded spruce sawfly (Pikonema alaskensis)

Cocq, Thibaut Leinekugel Le; Quiring, Dan T.; Verrez, Alice; Park, Yill Sung

doi:10.1016/j.foreco.2005.05.006

Cited by 7 publications

(1 citation statement)

References 22 publications

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“…The cell density used in the inoculum, lower than the density generally used in resistance tests for breeding purposes (= 10 6 conidia ml -1 - Santini et al 2005, Solla et al 2005a, was chosen to avoid high mortality. If we had observed a wider range of wilt symptoms, the genetic variability would have been readily expressed and the heritability values would probably have been higher (Strong et al 1993, Le Cocq et al 2005. We acknowledge that the number of replicates should have been higher, but unfortunately some clones used for the diallel design, coded CC-VG2, M-IN5 and V-JR1 and later characterized as female-sterile trees (López-Almansa et al 2003, provided no seeds.…”

Section: Discussionmentioning

confidence: 99%

Genetic variation and heritability estimates of Ulmus minor and Ulmus pumila hybrids for budburst, growth and tolerance to Ophiostoma novo-ulmi

Solla¹,

López-Almansa²,

Martín³

et al. 2015

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Las plántulas obtenidas por cruzamiento Ulmus minor y U. minor × clones U. pumila fueron evaluados para florecer y por su resistencia de corteza a los daños del escarabajo, por su brotación vegetativa, su crecimiento en altura y su resistencia al Ophiostoma novo ulmi. Ramitas de polinización abierta y plántulas obtenidas a partir de los árboles padres fueron evaluados por los mismos rasgos. La mayoría de progenies tenía rasgos similares a sus padres, pero algunas presentan heterosis en el crecimiento anual o resistencia al Ophiostoma novo ulmi. El marchitamiento de hojas fue significativamente menor en progenies con U. minor × U. pumila en lugar de U. minor como progenitor (21,5 y 30,6%, respectivamente; P<0,05). La resistencia a O. novo ulmi aumentó significativamente en función de las mayores cantidades de U. pumila germoplasma del progenitor, sugiriendo que la resistencia a la enfermedad del olmo holandés es principalmente transmitida de la madre. La brotación fue anterior en las plántulas con tasas más bajas de crecimiento (P=0,0007) y el porcentaje de marchitez fue negativo en relación a comienzos de la brotación (P<0,0001). Otras relaciones fenotípicas incluyeron porcentajes de árboles florecientes y el crecimiento anual en altura (RP=0,44; P=0.0042), el porcentaje de árboles florecientes y la brotación vegetativo (RP=-0,53; p=0,0004), así como el porcentaje de escarabajos-árboles afectados y su crecimiento anual en altura (RP=0,60; P<0,0001). Las estimaciones de heredabilidad obtenidos de la regresión y de los métodos de varianza componentes variaron de 0,06 ± 0,04 a 0,64 ± 0,18; 0,10 ± 0,05 a 0,69 ± 0,17 y 0,13 ± 0,32 a 0,71 ± 0,22 para la brotación, crecimiento y tolerancia al O. novo ulmi, respectivamente. Un amplio y estrecho sentido de los valores de heredabilidad fueron superiores cuando se estima que 60 días después de la inoculación (dpi) de 15, 30 o 120 ppp. Estimaciones de heredabilidad y ventajas genéticas notificadas indican un alto grado de control genético aditivo y a demostrar la eficacia de la selección para la resistencia a la enfermedad del olmo holandés y el rápido crecimiento de los árboles.Seedlings obtained by crossing Ulmus minor and U. minor × U. pumila clones were assessed for flowering, bark beetle damage, vegetative budburst, height growth and resistance to Ophiostoma novo ulmi. Ramets and open pollinated seedlings obtained from the parent trees were assessed for the same traits. Most progenies had similar traits to their parents, but some presented heterosis in annual growth or resistance to O. novo-ulmi. Leaf wilting was significantly lower in progenies with U. minor × U. pumila rather than U. minor as female parent (21.5 and 30.6%, respectively; P<0.05). Resistance to O. novo ulmi increased significantly as a function of increased amounts of U. pumila germplasm from the female parent, suggesting that resistance to Dutch elm disease is primarily transmitted from the mother. Budburst occurred earlier in seedlings with low rather than high growth rates (P=0.0007) and percentage o...

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Section: Discussionmentioning

confidence: 99%

Genetic variation and heritability estimates of Ulmus minor and Ulmus pumila hybrids for budburst, growth and tolerance to Ophiostoma novo-ulmi

Solla¹,

López-Almansa²,

Martín³

et al. 2015

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Temporal and spatial variation of flowering among Pinus nigra Arn. clones under changing climatic conditions

Alizoti

Kilimis

Gallios

2010

Forest Ecology and Management

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Genetic control and evolutionary potential of a constitutive resistance mechanism against the spruce budworm (Choristoneura fumiferana) in white spruce (Picea glauca)

et al. 2018

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Insect herbivory may drive evolution by selecting for trees with heritable resistance against defoliation. The spruce budworm (Choristoneura fumiferana, SBW) is a highly damaging forest insect pest that can affect population structure of white spruce (Picea glauca) in North America. Resistance against SBW was recently described in white spruce and was linked to three constitutive resistance biomarkers: the phenolic compounds piceol and pungenol, and expression of a beta-glucosidase encoding gene (Pgβglu-1). We investigated the phenotypic variability and heritability of these resistance biomarkers and of picein, the precursor of piceol, in the foliage of 874 trees belonging to 33 full-sib families and 71 clonal lines under evaluation in seven field locations in Eastern Canada. We aimed to (i) determine their genetic control, (ii) estimate the genetic and phenotypic correlations among defense biomarkers, and (iii) determine whether their constitutive levels are associated with detrimental trade-offs on growth. Quantitative genetics analyses indicated that all four traits are moderately to highly heritable. The full-sib and clonal analyses showed that additive and non-additive genetic effects play major and minor roles, respectively. Positive genetic and phenotypic correlations between resistance biomarkers and primary growth indicated that there is no trade-off between total height and height increment and resistance traits, contradicting the GDBH (Growth Differentiation Balance Hypothesis). Our findings about the predominant additive genetic basis of the resistance biomarkers show that adaptive evolution of white spruce natural populations to resist to SBW is possible and that potentially important gains could also be expected from artificial selection.

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Genetically based resistance of black spruce (Picea mariana) to the yellowheaded spruce sawfly (Pikonema alaskensis)

Cited by 7 publications

References 22 publications

Genetic variation and heritability estimates of Ulmus minor and Ulmus pumila hybrids for budburst, growth and tolerance to Ophiostoma novo-ulmi

Genetic variation and heritability estimates of Ulmus minor and Ulmus pumila hybrids for budburst, growth and tolerance to Ophiostoma novo-ulmi

Temporal and spatial variation of flowering among Pinus nigra Arn. clones under changing climatic conditions

Genetic control and evolutionary potential of a constitutive resistance mechanism against the spruce budworm (Choristoneura fumiferana) in white spruce (Picea glauca)

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