Variación genética en familias de polinización abierta de Tectona grandis L.f. en Colombia

Mayor, L. F. Llanos; Barrios-Trilleras, Alonso; Aguirre, Ana Milena López

doi:10.14483/2256201x.13797

Cited by 3 publications

(1 citation statement)

References 10 publications

(12 reference statements)

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“…The best linear unbiased predictors (BLUP) of families were calculated according to Eq. ( 10) [33], which was used to obtain the general combining ability (GCA) of parent trees in order to deduce the family's breeding values according to Eq. ( 11) [29].…”

Section: Statistical Analysesmentioning

confidence: 99%

Genetic Variation in Growth and Cone Traits of Pinus Koraiensis Half-Sib Families in Northeast China

Kaviriri¹,

Liu²,

Zhang³

et al. 2020

Phyton

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Genetic parameters were evaluated for growth and cone characteristics (tree height, diameter at breast height, volume, cone number, thousand seeds weight and single cone seeds weight) on 86 half-sib families of Pinus koraiensis aged 31 years. Analyses of variance revealed significant differences (p < 0.001) in all growth and cone traits among families while no significant differences were detected among blocks and the interaction between blocks and families. The average family values for growth traits were 17.22 m, 8.67 cm and 0.43 m 3 for tree height, diameter at breast height and volume, respectively. The average cone number, thousand seeds weight and single cone seeds weight were 17.57, 748.91 g and 77.25 g, respectively. Genotypic additive variance and phenotypic variances ranged from 0.00009 to 3.820 and from 0.0005 to 23.066, while genotypic and phenotypic coefficients of variation ranged from 2.693% to 37.196% and 4.963% to 60.595%, respectively. Heritability at the individual and family level ranged from 0.152 to 0.215 and 0.611 to 0.862, respectively. Growth traits were significantly positively correlated with each other, but cone traits showed a weak correlation with growth traits. Based on 10% selection rate, nine families each were selected as elite materials in terms of high performance in volume and cone numbers, with 22.16% and 43.82% genetic gain in volume and cone number, respectively. These results provide beneficial information to select excellent families and establish orchards of P. koraiensis from improved seeds.

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Section: Statistical Analysesmentioning

confidence: 99%

Genetic Variation in Growth and Cone Traits of Pinus Koraiensis Half-Sib Families in Northeast China

Kaviriri¹,

Liu²,

Zhang³

et al. 2020

Phyton

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Genetic Improvement of Teak

Callister

2021

Compendium of Plant Genomes

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Balancing wood production and water use efficiency in the selection of open-pollinated families of Gmelina arborea

López-Aguirre,

Barrios-Trilleras,

Melo-Cruz

2023

New Forests

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Global climate crisis and severe water scarcity worldwide demand alternative genotypes that allow an adequate balance between production and water use while ensuring benefits for foresters. The genetic improvement of water use efficiency (WUE) in forest plantations could reduce water use without compromising yield. Above-ground biomass (AGB), saw-wood volume up to small-end diameter of 15 cm (V15), wood density (WD) and intrinsic WUE (WUEi) from wood carbon isotopic discrimination was evaluated in forty open-pollinated families of G. arborea grown in a tropical dry forest known as a water-limited environment, to select superior genotypes considering a balance in wood production and water use. Heritability of open-pollinated family means were moderate with values of h2f = 0.554 for AGB, h2f = 0.541 for V15, h2f = 0.608 for WD and h2f = 0.495 for WUEi. Significant genetic correlations between both WD and WUEi and production traits (p < 0.05) and a nonsignificant genetic correlation between WD and WUEi were found. Although production traits and WUEi showed moderate narrow-sense and family means heritabilities, considerable responses to selection of up to 13.7% in AGB, 15.5% in V15, 2.5% in WD and 3.0% in WUEi could be achieved from intensive selection of superior families. Our results showed that it may be possible balancing wood production and WUE by selecting open-pollinated families of G. arborea with higher V15 and WUEi. The deployment of these superior families can be used as a forest management strategy to adapt the species to future drought scenarios associated with global climate change.

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Variación genética en familias de polinización abierta de Tectona grandis L.f. en Colombia

Cited by 3 publications

References 10 publications

Genetic Variation in Growth and Cone Traits of Pinus Koraiensis Half-Sib Families in Northeast China

Genetic Variation in Growth and Cone Traits of Pinus Koraiensis Half-Sib Families in Northeast China

Genetic Improvement of Teak

Balancing wood production and water use efficiency in the selection of open-pollinated families of Gmelina arborea

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