Genetic and phenotypic variations in early growth performances of grevillea trees for use in agroforestry systems

Shimizu, J. Y.; Spence, L.A.; Martins, Edna; Araujo, Arr

doi:10.1505/ifor.4.2.128.17444

Cited by 8 publications

(8 citation statements)

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“…Nevertheless, they were within the range of values reported for other tropical hardwoods at an early age (e.g., Cornelius et al, 1996;Greaves et al, 1997;Shimizu et al, 2002;Sotelo Montes et al, 2006). The estimated h 2 i was slightly higher for tree height than stem diameter: a similar result was observed in some other tropical hardwoods (Pinyopusarerk et al, 1996;Hodge et al, 2002;Sotelo Montes et al, 2006), although there are exceptions (e.g.…”

Section: Estimates Of Heritability For Tree Height and Stem Diameter supporting

confidence: 85%

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

Rochon

Margolis

Weber³

2007

Forest Ecology and Management

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Section: Estimates Of Heritability For Tree Height and Stem Diameter supporting

confidence: 85%

“…(Osorio, 2004); Grevillea robusta Cunn. (Shimizu et al, 2002); Vochysia guatemalensis Sm., J.D. (Cornelius and Mesén, 1997)].…”

Section: Variation In Tree Height and Stem Diameter At 12 Monthsmentioning

confidence: 99%

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

Rochon

Margolis

Weber³

2007

Forest Ecology and Management

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“…Estimates of individual tree heritability (h i 2 ) for growth traits of C. spruceanum were within the range of values reported for other tropical hardwoods at an early age (e.g., CORNELIUS et al, 1996;GREAVES et al, 1997;SHIMIZU et al, 2002). The estimated h i 2 was slightly higher for tree height than stem diameter at 10 cm above ground: h i 2 across zones, averaged over ages, was 0.25 for height and 0.19 for diameter (Table 5).…”

Section: Heritability Of Tree Growth and Basic Density Of Juvenile Woodsupporting

confidence: 80%

“…(OSORIO, 2004); Grevillea robusta Cunn. (SHIMIZU et al, 2002); Guazuma crinita Mart. (ROCHON, 2004); Vochysia guatemalensis Sm., J.D.…”

Section: Variation In Tree Growthmentioning

confidence: 99%

Genetic Variation and Correlations between Growth and Wood Density of Calycophyllum spruceanum at an Early Age in the Peruvian Amazon

et al. 2006

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Calycophyllum spruceanum (Benth.) Hook. f. ex K. Shum. is an important timber-tree species in the Peruvian Amazon Basin. As farmers and industry often use wood from young trees, it is important to investigate variation in juvenile wood properties in this species. A provenance/progeny test was established to evaluate genetic variation in growth and wood properties of young trees, the strength of their genetic control as well as their interrelationships both at the genetic and the phenotypic level in different planting zones. In this paper, results are presented for tree height and stem diameter (near ground level) at 16, 28 and 39 months; and stem diameter and basic density of the wood at breast height at 39 months. Significant variation due to provenances and especially due to families within provenances was found in growth and wood density. Phenotypic and genetic correlations indicated that larger trees tended to have denser wood. Wood density had higher heritability than height and diameter; and genetic control over height, diameter and density was generally highest in the planting zone where trees grew most rapidly.

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“…Although individual tree heritability (h 2 i ) of height and stem diameter of G. crinita were relatively low in this test, they were within the range of values reported for other tropical hardwoods at an early age (e.g., COR-NELIUS et al, 1996;GREAVES et al, 1997;SHIMIZU et al, 2002;SOTELO MONTES et al, 2006). At 24 months, h 2 i was too low for effective selection of faster-growing families across all plantations.…”

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

confidence: 58%

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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Genetic and phenotypic variations in early growth performances of grevillea trees for use in agroforestry systems

Cited by 8 publications

References 0 publications

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

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

Genetic Variation and Correlations between Growth and Wood Density of Calycophyllum spruceanum at an Early Age 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

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