Performance Differences and Genetic Parameters of Four Local Spanish Populations of Juglans Regia in the North of Spain

Contreras-Díaz, Roberto; Baoune, N.; Ninot, A.; Fernández-López, J.; Aletà, N.

doi:10.17660/actahortic.2005.705.10

Cited by 3 publications

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“…However, the adaptive character of frost resistance should also be considered with respect to other specific traits related to timber production, such as growth rate and forest growth habit. In this sense, the results of previous studies involving dendrometric characterization of the first four growing seasons of provenances at the two trial sites (Díaz et al 2006) reveal genetic differences, with VL being the most vigorous provenance. Focusing on TS1, where the highest growth was observed, the two characters (growth and frost resistance) seemed not to be related.…”

Section: Importance Of the Provenances On Autumn Frost Resistance Andmentioning

confidence: 82%

“…However, the optimum average annual temperature at this trial site was above 15°C and, from this point of view, TS1 could therefore be a better place for planting walnut trees than TS2 (Garavel 1959) (Table 1). Previous studies at these trial sites showed that, at the fourth growing season, dendrometric data for the two trial sites were very different for the average diameter at breast heigh (DBH), with the higher values being registered at TS1 (Díaz et al 2006). Moreover, a warm autumn, with minimum temperatures of 12.5°C, delayed the onset of the senescence period, which was later at TS1 than at TS2 (Díaz et al 2006).…”

Section: Importance Of the Planting Site On Autumn Frost Resistancementioning

confidence: 91%

“…Previous studies at these trial sites showed that, at the fourth growing season, dendrometric data for the two trial sites were very different for the average diameter at breast heigh (DBH), with the higher values being registered at TS1 (Díaz et al 2006). Moreover, a warm autumn, with minimum temperatures of 12.5°C, delayed the onset of the senescence period, which was later at TS1 than at TS2 (Díaz et al 2006). The risk of frost was similar at the two sites (Table 1), but the expected severity of damage to plant tissue was higher on the plantation with a Mediterranean climate than that with an Atlantic influence.…”

Section: Importance Of the Planting Site On Autumn Frost Resistancementioning

confidence: 93%

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Genotype and environment: two factors related to autumn cold hardiness on Persian walnut (Juglans regia L.)

Guàrdia

Savè

Díaz

et al. 2013

Annals of Forest Science

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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Genotype and environment: two factors related to autumn cold hardiness on Persian walnut (Juglans regia L.

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Section: Importance Of the Provenances On Autumn Frost Resistance Andmentioning

confidence: 82%

Section: Importance Of the Planting Site On Autumn Frost Resistancementioning

confidence: 91%

Section: Importance Of the Planting Site On Autumn Frost Resistancementioning

confidence: 93%

See 1 more Smart Citation

Genotype and environment: two factors related to autumn cold hardiness on Persian walnut (Juglans regia L.)

Guàrdia

Savè

Díaz

et al. 2013

Annals of Forest Science

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“…(Cannell et al, 1987), Q. petraea (Deans and Harvey, 1996;Jensen and Deans, 2004) and in P. trichocarpa (McCamant and Black, 2000) and for other cold adaptation traits, such as timing of phenological events in Q. robur L. (Jensen and Deans, 2004), and in J. regia L. (Díaz et al, 2006).…”

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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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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Phenotypic variability in the shape of nuts recorded in the seedling raised walnut (Juglans regia L.) population in the Kashmir valley

Lone

2017

IJPS

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Phenotypic variability in the shape of nuts recorded in the seedling raised walnut (Juglans regia L.) population in the Kashmir valley SUMMARYThe present investigation entitled phenotypic variability in the nut shape in the seedling raised natural population of walnut (J. regia) in the Kashmir valley was carried out in order to document the available genetic variability in walnut germplasm and to select elite walnut genotypes possessing superior attributes and quality traits. During the survey, data was recorded on one hundred fifty two (152) walnut trees growing in different areas of Kashmir valley. Remarkable variability was observed in seedling walnut trees for different morphological, nut and kernel characters. Similarly, variations were also reported for other characters viz., tree vigour, growth habit, branching habit, leaflet shape, shoot colour, nut shape, shell texture, shell colour, shell seal, shell strength, shell integrity, kernel shrivel and kernel colour. Studies on nut shape revealed nut shape varied from round to cordate. Majority of the genotypes (56) that represented 36.85 per cent population had round nut shape followed by 36 genotypes (23.69%) that had ovate nut shape; 8 genotypes (5.27%) had triangular nut shape; 10 genotypes (6.58%) had broad ovate nut shape; 7 genotypes (4.60%) had short trapezoid nut shape, 3 genotypes (1.97%) had long trapezoid nut shape, 16 genotypes (10.52%) had broad elliptic nut shape and the remaining 13 genotypes (8.55%) had elliptic nut shape.

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Performance Differences and Genetic Parameters of Four Local Spanish Populations of Juglans Regia in the North of Spain

Cited by 3 publications

References 0 publications

Genotype and environment: two factors related to autumn cold hardiness on Persian walnut (Juglans regia L.)

Genotype and environment: two factors related to autumn cold hardiness on Persian walnut (Juglans regia L.)

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

Phenotypic variability in the shape of nuts recorded in the seedling raised walnut (Juglans regia L.) population in the Kashmir valley

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