Mapping of quantitative trait loci controlling adaptive traits in coastal Douglas-fir. I. Timing of vegetative bud flush

Jermstad, K. D.; Bassoni, Daniel L.; Jech, K. S.; Wheeler, Nicholas C.; Neale, David B.

doi:10.1007/s001220000505

Cited by 93 publications

(85 citation statements)

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“…The close correlation between bud phenology and frost hardiness may indicate that these two traits are controlled by overlapping genes. This occurs in some species, such as P. menziesii, in which three QTL (quantitative trait loci) for spring cold hardiness were mapped at the same locations as QTL for spring bud burst (Jermstad et al, 2001). Although timing of bud burst and leaf fall are important for spring and autumn frost tolerance, there must be other genetic factors involved, as reported for other species (Deans and Harvey, 1996;Jensen and Deans, 2004;Liepe, 1993).…”

Section: Discussionmentioning

confidence: 85%

“…In general, data corresponding to the two highest temperatures (-7 and -10 • C) were used in the spring test, while data corresponding to the two intermediate temperatures (-10 and -12 • C) were used in the autumn test. For the field variables, we used score data recorded on a single day, selecting the date with the maximum coefficient of variation (Baliuckas et al, 1999;Jermstad et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

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Variation de la résistance au gel au printemps et en automne entre et dans les populations espagnoles sauvages de Castanea sativa

Díaz

Johnsen²,

Fernández-López

2009

Ann. For. Sci.

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Abstract• Genetic variation in freezing resistance was evaluated among and within six populations of Spanish wild chestnut (Castanea sativa Miller). The extent to which frost susceptibility was related to phenology and the relationship between population differentiation and climatic conditions was studied.• Twigs were collected in March and November from saplings (5-year-old trees) of 41 openpollinated families from the six populations in a provenance-progeny test, and were subjected to artificial freezing. Damage to each twig was assessed as visible browning of bud and of stem tissues.• Population differences as regards frost damage traits were highly significant (p < 0.01) in both spring and autumn. Family differences within populations were low, often non-significant, and in all cases smaller than differences among populations. Population means were closely correlated with the parental drought and frost conditions. Populations originating from dry areas or from regions where frost seldom occurs were the least resistant.• Drought is suggested to be the one of the most important selective agents that shapes population differentiation in Spanish wild chestnut, while frost may be more important in northern Spain. Phenological differences are not always good predictors of the degree of frost damage. Thus, freezing tests should be used to detect frost susceptibility in chestnuts.Mots-clés : châtaignier sauvage / variation génétique / test de congélation / caractéristiques phénologiques / résistance au gel Résumé -Variation de la résistance au gel au printemps et en automne entre et dans les populations espagnoles sauvages de Castanea sativa.• La variation génétique de la résistance au gel a été évaluée entre et dans six populations espagnoles sauvages de châtaignier (Castanea sativa Miller). L'ampleur avec laquelle la sensibilité au gel est liée à la phénologie et aux relations entre la différenciation de la population et les conditions climatiques a été étudiée.• Des rameaux ont été recueillis en mars et novembre à partir de jeunes arbres (âgés de 5 ans) de 41 familles à pollinisation libre issues de six populations en test de descendances/provenances, et ont été soumis à une congélation artificielle. Les dommages à chaque rameau ont été évalués par le brunissement visible des bourgeons et des tissus de la tige.• Les différences entre population pour ce qui concerne les dégâts causés par le gel sont très significatifs (p < 0.01) au printemps et en automne. Les différences entre familles dans les populations sont faibles, souvent non significatives, et dans tous les cas plus petites que les différences parmi les populations. Les moyennes des populations sont étroitement corrélées avec les conditions de séche-resse et de gel auxquelles sont soumis les parents.Les populations originaires des régions sèches ou de régions où le gel se produit rarement sont les moins résistantes.• On suggère que la sécheresse est l'un des plus importants agents sélectifs qui forme la différencia-tion dans la population espagnole de chât...

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Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Variation de la résistance au gel au printemps et en automne entre et dans les populations espagnoles sauvages de Castanea sativa

Díaz

Johnsen²,

Fernández-López

2009

Ann. For. Sci.

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“…Differences between genetic entries for flushing time were studied using different types of variables, being the analysis of single date scores one of them. This is a cheap method that allows an efficient detection of differences between genetic entries if records are taken when 50% of the trees have flushed (Baliuckas et al, 1999;Jermstad et al, 2001). In this experiment, raw flushing scores were used for the analysis of each date data, while for the joint analysis of years and sites standardised data were used to remove the effect of different means and variances across years and sites.…”

Section: Discussionmentioning

confidence: 99%

Geographic differentiation in adaptive traits of wild chestnut Spanish populations (Castanea sativa Miller)

et al. 2005

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Flushing, spring frost damages and height were recorded in a provenance test including nineteen populations covering most Spanish chestnut distribution and were analysed to study the differentiation among wild populations. There was remarkable differentiation among populations in flushing time and height growth and Qst was higher for flushing and frost damage, and lower for height. The coefficients of quantitative differentiation among populations were similar to the values obtained for other autochthonous species. Spanish chestnut wild populations were classified in three groups: early flushing xeric populations from the Mediterranean, late flushing populations from northern mountains and intermediate flushing populations from Galician coast and Canary Islands. The observation of variability patterns indicated the importance of natural selection and a restricted gene flow as factors shaping the structure of wild populations in Spain. The use of local sources in plantations was recommended.

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“…Quantitative trait loci (QTL) mapping studies have allowed us to begin dissecting these complex traits (Jermstad et al 2001a(Jermstad et al , b, 2003Wheeler et al 2005;Carlson et al 2007). Several genomic regions responsible for genetic control of growth rhythm and cold hardiness traits were found, but QTL mapping does not reveal which individual genes are responsible for these effects.…”

mentioning

confidence: 99%

Estimation of population structure in coastal Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco var. menziesii] using allozyme and microsatellite markers

Krutovsky

Clair

Saich

et al. 2009

Tree Genetics & Genomes

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Characterizing population structure using neutral markers is an important first step in association genetic studies in order to avoid false associations between phenotypes and genotypes that may arise from nonselective demographic factors. Population structure was studied in a wide sample of ∼1,300 coastal Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco var. menziesii] trees from Washington and Oregon. This sample is being used for association mapping between cold hardiness and phenology phenotypes and single-nucleotide polymorphisms in adaptive-trait candidate genes. All trees were genotyped for 25 allozyme and six simple sequence repeat (SSR) markers using individual megagametophytes. Population structure analysis was done separately for allozyme and SSR markers, as well as for both datasets combined.

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Mapping of quantitative trait loci controlling adaptive traits in coastal Douglas-fir. I. Timing of vegetative bud flush

Cited by 93 publications

References 20 publications

Variation de la résistance au gel au printemps et en automne entre et dans les populations espagnoles sauvages de Castanea sativa

Variation de la résistance au gel au printemps et en automne entre et dans les populations espagnoles sauvages de Castanea sativa

Geographic differentiation in adaptive traits of wild chestnut Spanish populations (Castanea sativa Miller)

Estimation of population structure in coastal Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco var. menziesii] using allozyme and microsatellite markers

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