A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Genetic Variation in Water-Use Efficiency (WUE) and Growth in Mature Longleaf Pine
The genetic and physiological quality of seedlings is a critical component for longleaf pine (Pinus palustris Mill.) restoration, because planting genetic material that is adapted to environmental stress is required for long-term restoration success. Planting trees that exhibit high water-use efficiency (WUE) is a practice that could maximize this species’ survival and growth in a changing climate. Our study evaluates genetic variation in WUE and growth, as well as WUE-growth relationships, a key step to determine potential for breeding and planting trees with high WUE. We measured carbon isotope discrimination (∆)—a proxy for WUE—in 106 longleaf pine increment cores extracted from trees belonging to nine full-sib families. Tree diameter and total tree height were also measured at ages 7, 17, 30 and 40 years. Each increment core was divided into segments corresponding to ages 7⁻17, 18⁻30 and 31⁻40, representing early, intermediate and mature growth of the trees. We identified significant genetic variation in DBH and WUE among families that merit further exploration for identifying trees that can potentially withstand drought stress. Mean family growth rates were not associated with mean family values for carbon isotope discrimination. Family variation in both diameter growth and WUE but no relationship between family values for these traits, suggests it is possible to improve longleaf pines in both diameter growth and WUE through appropriate breeding.
Genetic Variation in Water-Use Efficiency (WUE) and Growth in Mature Longleaf Pine
The genetic and physiological quality of seedlings is a critical component for longleaf pine (Pinus palustris Mill.) restoration, because planting genetic material that is adapted to environmental stress is required for long-term restoration success. Planting trees that exhibit high water-use efficiency (WUE) is a practice that could maximize this species’ survival and growth in a changing climate. Our study evaluates genetic variation in WUE and growth, as well as WUE-growth relationships, a key step to determine potential for breeding and planting trees with high WUE. We measured carbon isotope discrimination (∆)—a proxy for WUE—in 106 longleaf pine increment cores extracted from trees belonging to nine full-sib families. Tree diameter and total tree height were also measured at ages 7, 17, 30 and 40 years. Each increment core was divided into segments corresponding to ages 7⁻17, 18⁻30 and 31⁻40, representing early, intermediate and mature growth of the trees. We identified significant genetic variation in DBH and WUE among families that merit further exploration for identifying trees that can potentially withstand drought stress. Mean family growth rates were not associated with mean family values for carbon isotope discrimination. Family variation in both diameter growth and WUE but no relationship between family values for these traits, suggests it is possible to improve longleaf pines in both diameter growth and WUE through appropriate breeding.
Genetic Variation in Water-Use Efficiency (WUE) and Growth in Mature Longleaf Pine
Ana C. Castillo (author) / Barry Goldfarb (author) / Kurt H. Johnsen (author) / James H. Roberds (author) / C. Dana Nelson (author)
2018
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Genetic Variation in Longleaf Pine
| British Library Conference Proceedings | 1993
Restoring Longleaf Pine Community Integrity
| British Library Conference Proceedings | 1993
Dynamics of an Old-Growth Longleaf Pine Population
| British Library Conference Proceedings | 1993
Growth and Yield in Naturally-Regenerated Longleaf Pine Stands
| British Library Conference Proceedings | 1993
Regenerating Longleaf Pine with Natural Seeding
| British Library Conference Proceedings | 1993