2009
DOI: 10.1051/forest/2009021
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Variation génétique de la composition isotopique du carbone chez Juglans regia L. : relations avec la croissance, la phénologie et le climat d’origine

Abstract: Abstract• Among the traits of breeding interest for the common walnut tree Juglans regia L., characteristics such as timing of budbreak and leaf fall, water-use efficiency and growth performance are regarded as being of utmost relevance in Mediterranean conditions.• The authors evaluated intraspecific variation in δ 13 C (carbon isotope composition, surrogate of intrinsic water-use efficiency, WUE i ) for 22 J. regia families grown in a progeny test under supplementary irrigation, and investigated whether such… Show more

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Cited by 21 publications
(13 citation statements)
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“…While Δ 13 C values did not significantly correlate with A max , nor A max /g s , measurements, the trend of a negative relationship was observed providing justification for further investigation of Δ 13 C with the possibility of breeding potential (Brendel et al 2008). Additionally, the negative relationship Δ 13 C and %C coupled with the positive correlation of %C and %N could elucidate the positive correlation of %N and A max suggesting that variation of Δ 13 C could be more strongly controlled by stomatal conductance than photosynthetic capacity as previous studies have shown (Rosati et al 2006;Aletà et al 2009). Broader experiments within the breeding program should be considered for future field measurements to identify connections between mesophyll conductance and the effects of evaporative demand on water-use efficiency (Condon et al 2004;Seibt et al 2008).…”
Section: Discussionmentioning
confidence: 56%
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“…While Δ 13 C values did not significantly correlate with A max , nor A max /g s , measurements, the trend of a negative relationship was observed providing justification for further investigation of Δ 13 C with the possibility of breeding potential (Brendel et al 2008). Additionally, the negative relationship Δ 13 C and %C coupled with the positive correlation of %C and %N could elucidate the positive correlation of %N and A max suggesting that variation of Δ 13 C could be more strongly controlled by stomatal conductance than photosynthetic capacity as previous studies have shown (Rosati et al 2006;Aletà et al 2009). Broader experiments within the breeding program should be considered for future field measurements to identify connections between mesophyll conductance and the effects of evaporative demand on water-use efficiency (Condon et al 2004;Seibt et al 2008).…”
Section: Discussionmentioning
confidence: 56%
“…As the strain on California's agricultural water supply continues, targeted breeding for water use efficiency in perennial crops, such as walnut, will rise in priority (Condon et al 2004;Aletà et al 2009;Bassett et al 2011). Demand for agricultural water will persist in walnut production as production acreage and crop exportation increases.…”
Section: Discussionmentioning
confidence: 99%
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“…; Aletà et al . ). In our case, the genotypes with the earliest growth onset were also the most efficient to use water based on δ 13 C values.…”
Section: Discussionmentioning
confidence: 97%
“…The relationship between leaf phenological events and WUE may be informative for strategies regarding resource use efficiency. The patterns reported in the literature are however conflicting (Hall et al 1994;Aletà et al 2009). In our case, the genotypes with the earliest growth onset were also the most efficient to use water based on δ 13 C values.…”
Section: Relationship Between Growth and δ 13 Cmentioning
confidence: 99%