Genetic variation in growth of Guazuma crinita (Mart.) trees at an early age in the Peruvian Amazon

Rochon, Caroline; Margolis, Hank A.; Weber, John C.

doi:10.1016/j.foreco.2007.03.025

Cited by 31 publications

(49 citation statements)

References 15 publications

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“…There were large, significant differences in mean growth of G. crinita trees among zones at 24 months, whereas the differences were not significant at 12 months (ROCHON et al, 2007). This illustrates the fact that differences in tree growth among planting environments tend to increase over time (e.g., WEBER and SOTE- LO MONTES, 2005;SOTELO MONTES et al, 2006;WEBER and SOTELO MONTES, 2008).…”

Section: Genetic and Environmental Variation In Tree Height And Stem mentioning

confidence: 89%

“…al.·Silvae Genetica (2011) 60-2, 70-78 weeks during the dry season, but weeding was not systematically done due to time and labor constraints. The relatively large plantation size (about 0.3 ha) combined with farmers' erratic weeding practices probably affected the differences among plantations and among families within plantations, as well as the stability of provenance and family performance across plantations (ROCHON et al, 2007).…”

Section: Methodsmentioning

confidence: 99%

“…Details about the sample region, study area, experimental design and management of the provenance/progeny test are provided elsewhere (Rochon et al, 2007).…”

Section: Methodsmentioning

confidence: 99%

“…The larger coefficients of variation (CV) for tree height and stem diameter in the slower-growing plantations at 24 months were probably related to differences in microenvironmental variation and leaf abscission (ROCHON et al, 2007). The faster-growing plantations were in the upper and middle zones while the slower-growing plantations were in the lower and middle zones of the watershed.…”

Section: Genetic and Environmental Variation In Tree Height And Stem mentioning

confidence: 99%

“…A provenance/progeny test of G. crinita was established on farms in the Aguaytía watershed (Rochon et al, 2007), which is representative in terms of environmental conditions of many other watersheds in the western Peruvian Amazon. Mean annual rainfall and soil fertility increase in general from the lower to the upper part of the watershed.…”

Section: Introductionmentioning

confidence: 99%

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Genetic variation in tree growth, stem form and mortality of Guazuma crinita in slower- and faster-growing plantations in the Peruvian Amazon

Weber¹,

Montes²,

Cornelius

et al. 2011

Silvae Genetica

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Guazuma crinita is an important timber tree with a rotation age of 6-12 years in the Peruvian Amazon. A provenance/progeny test containing 200 families from seven locations (provenances) in the Aguaytía watershed of Peru was established in three zones in the Aguaytía watershed that differ in mean annual rainfall and soil fertility. Farmers managed the replications as plantations. Replications were divided into two groups at 24 months: faster-and slower-growing plantations. The faster-growing plantations were thinned at 32 months. The objectives of this paper are to determine if genetic variation in growth traits (tree height, stem diameter) is relatively greater in the faster-growing plantations, and if there are significant differences in tree mortality and stem bifurcations among provenances and families at 24, 36 and 48 months. Variation due to provenances and families and heritability of growth traits were consistently greater in the faster-growing plantations. At 48 months, heritability of growth traits was about twice as large in the faster-than in the slower-growing plantations. There were no significant interactions between zones and either provenances or families. Tree mortality and stem bifurcations in the faster-growing plantations generally did not differ significantly among families, but did differ significantly among provenances. Based on these results and considering its rotation age, we recommend that G. crinita families/trees could be selected at 48 months in the faster-growing plantations, the plantations could be transformed into seed orchards and the seed could be used for reforestation throughout the Aguaytía watershed. Results are compared with other tropical hardwoods.

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Section: Genetic and Environmental Variation In Tree Height And Stem mentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

“…Details about the sample region, study area, experimental design and management of the provenance/progeny test are provided elsewhere (Rochon et al, 2007).…”

Section: Methodsmentioning

confidence: 99%

Section: Genetic and Environmental Variation In Tree Height And Stem mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Genetic variation in tree growth, stem form and mortality of Guazuma crinita in slower- and faster-growing plantations in the Peruvian Amazon

Weber¹,

Montes²,

Cornelius

et al. 2011

Silvae Genetica

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Maximizing bolaina wood utilization: extraction of cellulose nanofibers from sawdust waste

Díaz,

Mora,

Gacitúa

et al. 2024

Eur. J. Wood Prod.

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Managing genetic variation in tropical trees: linking knowledge with action in agroforestry ecosystems for improved conservation and enhanced livelihoods

et al. 2008

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Tree species in agroforestry ecosystems contribute to the livelihoods of rural communities and play an important role in the conservation of biodiversity. Unless agroforestry landscapes are productive, however, farmers will not maintain or enhance the range and quality of tree species in them, and both income opportunities and biodiversity will be lost. Productivity depends on both tree species diversity and genetic (intra-speciWc) variation, but research on the latter has until recently not received the recognition it deserves. Worse, when knowledge on tree genetic variation in agroforestry systems has become available, it has not generally been linked in any systematic way with management, indicating a disjunction between research and Weld-level practice. In this essay, we attempt to bridge this gap by considering three questions: why is genetic diversity important in tree species? What is our current state of knowledge about intra-speciWc variation in trees in agroforestry systems? And, Wnally, what practical interventions are possible to support the conservation of this diversity in agricultural landscapes, while enhancing farmers' livelihoods? A wide genetic base in agroforestry trees is essential to prevent inbreeding depression and allow adaptation to changing environmental conditions and to altering markets for tree products. Recent evidence shows, however, that many species are subject to poor germplasm collection practice, occur at low densities in farmland, and are found in highly aggregated distributions, all of which observations raise concerns about productivity and sustainability. A range of germplasmaccess based interventions is necessary to improve current management, including the enhancement of community seed-and seedling-exchange networks, and the development of locally based tree domestication activities. Equally necessary, but more diYcult to address, is Biodivers Conserv (2009) 18:969-986 1 C the development of markets that support genetic diversity in tropical tree species; we discuss approaches by which this may be undertaken.

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Genetic variation in growth of Guazuma crinita (Mart.) trees at an early age in the Peruvian Amazon

Cited by 31 publications

References 15 publications

Genetic variation in tree growth, stem form and mortality of Guazuma crinita in slower- and faster-growing plantations in the Peruvian Amazon

Genetic variation in tree growth, stem form and mortality of Guazuma crinita in slower- and faster-growing plantations in the Peruvian Amazon

Maximizing bolaina wood utilization: extraction of cellulose nanofibers from sawdust waste

Managing genetic variation in tropical trees: linking knowledge with action in agroforestry ecosystems for improved conservation and enhanced livelihoods

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