<abstract xmlns="http://www.w3.org/1999/xhtml"><p>We analyzed a 21-year old progeny test of Konishii fir (<italic>Cunninghamia lanceolata</italic> (Lamb.) Hook. var. <italic>konishii</italic>) involving 75 families. Tree height and diameter at breast height (DBH) were periodically recorded. At age 21, average height, DBH, and volume were 15.2 m, 20.2 cm, and 278 dm<sup>3</sup>, respectively. At this age, family accounted for 9, 12, and 11% of the total variance in height, DBH and volume, respectively. Also at age 21, individual tree heritability was 0.35, 0.49, and 0.45 for height, DBH and volume, respectively, and family heritability was 0.53, 0.69, and 0.66 for the three respective characteristics. The age trend for all genetic parameters was more stable for DBH than for height and volume. Family (backward) selection for DBH at age 21 resulted in a 9.6% gain and indirectly 5.1 and 21.0% gains for height and volume, respectively, compared to 5.2 and 20.1% gains for height and volume, respectively, when selection for these characteristics is done directly. DBH is an effective proxy trait for selection in growth. DBH is also less susceptible than height to typhoon damage, which frequently afflicts tree plantations in Taiwan. Therefore, DBH should be considered as the primary trait for selection for Konishii fir in Taiwan. Konishii fir is a genetically variable species despite its limited geographic range, and is fast growing which makes it a viable candidate species for tree improvement.</p></abstract>

We analyzed a 21-year old progeny test of Konishii fir (Cunninghamia lanceolata (Lamb.) Hook. var. konishii) involving 75 families. Tree height and diameter at breast height (DBH) were periodically recorded. At age 21, average height, DBH, and volume were 15.2 m, 20.2 cm, and 278 dm3, respectively. At this age, family accounted for 9, 12, and 11% of the total variance in height, DBH and volume, respectively. Also at age 21, individual tree heritability was 0.35, 0.49, and 0.45 for height, DBH and volume, respectively, and family heritability was 0.53, 0.69, and 0.66 for the three respective characteristics. The age trend for all genetic parameters was more stable for DBH than for height and volume. Family (backward) selection for DBH at age 21 resulted in a 9.6% gain and indirectly 5.1 and 21.0% gains for height and volume, respectively, compared to 5.2 and 20.1% gains for height and volume, respectively, when selection for these characteristics is done directly. DBH is an effective proxy trait for selection in growth. DBH is also less susceptible than height to typhoon damage, which frequently afflicts tree plantations in Taiwan. Therefore, DBH should be considered as the primary trait for selection for Konishii fir in Taiwan. Konishii fir is a genetically variable species despite its limited geographic range, and is fast growing which makes it a viable candidate species for tree improvement.

Genetic Variation and Tree Improvement of Konishii fir (<italic>Cunninghamia lanceolata</italic> (Lamb.) Hook. var. <italic>konishii</italic>) in Taiwan

BC Ministry of Forests and Range, Research

Silvae Genetica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Genetic Variation and Tree Improvement of Konishii fir ( (Lamb.) Hook. var. ) in Taiwan

We analyzed a 21-year old progeny test of Konishii fir (Cunninghamia lanceolata (Lamb.) Hook. var. konishii) involving 75 families. Tree height and diameter at...

Genetic Variation and Tree Improvement of Konishii fir (Cunninghamia lanceolata (Lamb.) Hook. var. konishii) in Taiwan

Pubblicato online: 05 ago 2017

Pagine: 196 - 205

Ricevuto: 23 ago 2010

DOI: https://doi.org/10.1515/sg-2011-0026

Parole chiave
Konishii fir, genetic variation, tree improvement, Taiwan

© 2011 Jeng-Der Chung et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Genetic Variation and Tree Improvement of Konishii fir (Cunninghamia lanceolata (Lamb.) Hook. var. konishii) in Taiwan

Pubblicato online: 05 ago 2017

Pagine: 196 - 205

Ricevuto: 23 ago 2010

DOI: https://doi.org/10.1515/sg-2011-0026

Parole chiaveKonishii fir, genetic variation, tree improvement, Taiwan

© 2011 Jeng-Der Chung et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
Konishii fir, genetic variation, tree improvement, Taiwan