A comparison of the effect of genetic improvement, seed source and seedling seed orchard variables on progeny growth in Eucalyptus nitens in South Africa

AbstractDifferences in height-diameter (H-DBH) relationship were investigated using the Chapman-Richards function among jack pine seedlots planted in a realized genetic gain test in New Brunswick. Three seedlots representing the bulk mixed cone collection from the 1979 J.D. Irving’s first-generation seedling seed orchard (JDISSO) before rogueing (UNR), after the first time genetic rogueing (1STR) and after the second time genetic rogueing (2NDR), respectively, were planted in the test. Unimproved commercial seedlots (UC) were also included for comparison. Results indicate that an overall H-DBH relationship for all the seedlots was not appropriate. Seedlot pairwise comparisons in H-DBH relationships showed that, whereas most seedlot pairs were significantly different from each other, there was no significant difference between the UNR and UC and between the 1STR and 2NDR. Two models were developed with one targeting the UNR and UC (UNIMPROVED) and the other targeting the 1STR and 2NDR (IMPROVED). The difference between the UNIMPROVED and IMPROVED models was caused only by asymptote of the Chapman-Richards function. Applying the UNIMPROVED or IMPROVED model to predict height of the 1STR and 2NDR or the UNR and UC would result in an under-estimated or an over-estimated bias by 2 to 3% in height. In light of this study, seedlot differences in H-DBH relationships should be integrated into growth and yield models by a multiplier for height depending on genetic improvement levels.

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PENILAIAN KESEHATAN KEBUN BENIH SEMAI Pinus merkusii DENGAN METODE FHM (FOREST HEALTH MONITORING) DI KPH SUMEDANG Health Assessment for Seedling Seed Orchard of Pinus merkusii Using FHM (Forest Health Monitoring) Method in KPH Sumedang

Journal of Tropical Silviculture ◽

10.29244/j-siltrop.9.2.99-108 ◽

2019 ◽

Vol 9 (2) ◽

pp. 99-108

Author(s):

Supriyanto . ◽

Taufik Iskandar

Keyword(s):

Health Monitoring ◽

Forest Health ◽

Seed Orchard ◽

Tree Damage ◽

Damage Level ◽

Seedling Seed Orchard ◽

Forest Health Monitoring ◽

Gum Rosin ◽

Damage Condition ◽

Pinus Merkusii

Pine (Pinus merkusii) is tree species that provides timber and gum rosin. To meet the needs of wood and non wood (gum rosin) products, planting by using superior or high quality seeds are needed. Seed procurements for planting are obtained from seedling seed orchard (SSO). However, Cijambu’s SSO was attacked by pine woolly aphid (Pineus boerneri). Therefore, assessment of Cijambu’s SSO needs to be done to evaluate the severity pest attacks that could affect to the quality and the quantity of seed production. Forest Health Monitoring (FHM) method is one of the methods to assess the health level of a stand. The number of trees found in all cluster plots in Cijambu’s SSO were 270 trees. Based on the value of the VCR (Visual Crown Rating), the trees located in all cluster plot have health level between low to high. Based on the value of the VCR showed 38.52% (104 trees) having VCR’s value was high, 49.26% (133 trees) having VCR’s value was middle; 12.22% (33 trees) having VCR’s value was low; and no tree having very low VCR’s value. The average of VCR’s value in all cluster plots were 3.25 and classified as middle health. Based on the value of TDLI (Tree Damage Level Index) from 270 trees in all cluster plot showed that 189 trees (70.00%) in healthy condition; 69 trees (25.56%) in slight damage condition; 11 trees (4.07%) in middle damage condition; and 1 tree (0.37%) in heavy damage condition. The value of damage in all cluster plots (ALI) was 261.22 and classified as in health condition. The trees located in all cluster plots were mostly suitable to be seed sources as 242 trees (89.63%), while 28 trees (10.37%) were not suitable for seed sources.Keywords: Forest Health Monitoring, Pinus merkusii, seedling seed orchard, Tree Damage Level Index, Visual Crown Rating

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A Canadian Example of Government-Industry Collaboration In Tree Improvement

The Forestry Chronicle ◽

10.5558/tfc52283-6 ◽

1976 ◽

Vol 52 (6) ◽

pp. 283-289 ◽

Cited By ~ 1

Author(s):

C. W. Yeatman

Keyword(s):

Seed Production ◽

Cold Hardiness ◽

Seed Orchard ◽

Jack Pine ◽

Tree Improvement ◽

Seed Sources ◽

Seedling Seed Orchard ◽

Forest Region ◽

Future Supply ◽

High Quality Seed

A program of provenance testing, seed production and genetic improvement of jack pine was developed in the Baskatong region of western Quebec through sustained collaboration among government forest services and forest industry. Research plantations demonstrated, within a period of 10 years from establishment, the superiority in growth, cold hardiness and disease resistance of regionally adapted local seed sources. Critical differences were evident between provenances from the Boreal Forest Region and those from the adjacent Sections of the Great Lakes — St. Lawrence Forest Region.A 300-acre (120 ha) seed production area was created within a genetically superior jack pine population of natural origin in the Côte Jaune area west of Lake Baskatong. Within this population, 325 plus trees were selected, marked and recorded over two years by student crews employed in the summer. Seed harvested from the felled plus trees will be used to create a seedling seed orchard and to establish progeny tests. The plus trees are to be grafted for controlled breeding among selected progeny-tested clones at a later date. This cooperative program of tree improvement will ensure the future supply of high quality seed that will maintain and enhance the value of the forest resource.

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Mass trapping of Coryphodema tristis (Lepidoptera: Cossidae) using a sex pheromone in Eucalyptus nitens compartments in Mpumalanga, South Africa

Southern Forests a Journal of Forest Science ◽

10.2989/20702620.2020.1813648 ◽

2020 ◽

Vol 82 (3) ◽

pp. 271-279

Author(s):

KP Noeth ◽

PM Verleur ◽

MC Bouwer ◽

JW Crous ◽

J Roux ◽

...

Keyword(s):

South Africa ◽

Sex Pheromone ◽

Mass Trapping ◽

Eucalyptus Nitens

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Genetics and expected selection gain for growth traits in Eugenia dysenterica DC. populations

Bragantia ◽

10.1590/s0006-87052009000300009 ◽

2009 ◽

Vol 68 (3) ◽

pp. 629-637 ◽

Cited By ~ 4

Author(s):

Ananda Virginia de Aguiar ◽

Roland Vencovsky ◽

Lázaro José Chaves ◽

Mara Fernandes Moura ◽

Lizz Kezzy de Morais

Keyword(s):

Genetic Variation ◽

Genetic Parameters ◽

Growth Traits ◽

Block Design ◽

Genetic Material ◽

Germplasm Collection ◽

Seed Orchard ◽

Seedling Seed Orchard ◽

Randomized Block Design ◽

Eugenia Dysenterica

The objective of this study was to estimate genetic parameters of quantitative traits in a living germplasm collection of Eugenia dysenterica. The genetic material consisted of 110 progenies derived from 10 natural Eugenia dysenterica subpopulations sampled in the southeastern region of the state of Goiás. The experiment was established in a complete randomized block design, with 110 treatments, four replications and one tree per plot. The study variables were total height, stem diameter and respective growth rates. After the analysis of variance some genetic parameters were estimated. The levels of genetic variation in the collection were high and the highest proportion was found within subpopulations. Highest coefficients of heritability and genetic variation were observed in subpopulations from the counties Catalão, Três Ranchos, Cristalina and Senador Canedo. Considering the promising expected progress for growth traits, this collection can be converted into an unrogued seedling seed orchard, aiming the production of improved seed.

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Genetic Variation, Heritability and Correlation between Resin Production Character of Pinus merkusii High Resin Yielder (HRy) in Cijambu Seedling Seed Orchard (SSO)

BIOTROPIA ◽

10.11598/btb.2013.20.2.257 ◽

2013 ◽

Vol 20 (2) ◽

Keyword(s):

Genetic Variation ◽

Seed Orchard ◽

Seedling Seed Orchard ◽

Pinus Merkusii

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Survival and Growth of Douglas-Fir Relating to Weeding, Fertilization, and Seed Source

Western Journal of Applied Forestry ◽

10.1093/wjaf/11.2.62 ◽

1996 ◽

Vol 11 (2) ◽

pp. 62-69 ◽

Cited By ~ 13

Author(s):

Brian E. Roth ◽

Michael Newton

Keyword(s):

Weed Control ◽

Nitrogen Fertilization ◽

Seedling Survival ◽

Seed Orchard ◽

Douglas Fir ◽

Seed Source ◽

Interactive Effects ◽

Dominant Factor ◽

Local Source ◽

Survival And Growth

Abstract The goal of this study was to quantitatively evaluate the individual and interactive effects of weed control, nitrogen fertilization, and seed source on Douglas-fir (Pseudotsuga menziesii) survival and growth in a range of sites and growing conditions in western Oregon. Weed control was the dominant factor influencing seedling survival and growth and accounted for 49% of the explained variation in seedling volume after 2 yr. Nitrogen fertilization had no effect when used in conjunction with weed control and a negative effect when used without weed control. Seedlings from a seed orchard source were significantly larger in diameter and volume than those from a wild local source after two growing seasons, but second-year heights were similar for the two seedling types. Initial seedling size was positively correlated with growth rate. West. J. Appl. For. 11(2):00-00.

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