Genetic parameters and genotype × environment interaction in Pinus taeda clonal tests

Braga, Rayssa Chaves; Paludeto, João Gabriel Zanon; Souza, Bruno Marchetti de; Aguiar, A. V. de; Pollnow, Maria Fernanda M.; Carvalho, Ana Gabriela Monnerat; Tambarussi, Evandro Vagner

doi:10.1016/j.foreco.2020.118342

Cited by 17 publications

(10 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The coefficient of environmental variation (CV e ) for DBH and H t obtained from the joint analysis ranged from 11.81% to 30.30%, demonstrating reasonable experimental precision. These results indicate that the model captured the majority of the variation in the study and that the estimates can be trusted [8]. These values are similar to those found by Zhao et al [10].…”

Section: Genetic Parameterssupporting

confidence: 89%

“…The clonal breeding of forest trees has developed rapidly in recent years because it is capable of producing more productive, better adapted, and more stable genotypes than natural varieties, as well as providing more promising management outcomes in commercial plantations [8,9]. The systematic clonal breeding of Paulownia in China began during the 1970s.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Genetic Parameters and Genotype–Environment Interactions in Paulownia Clonal Tests in Temperate and Subtropical Regions of China

Zhao

Feng

Yang

et al. 2022

Forests

View full text Add to dashboard Cite

Clonal forestry has developed rapidly in recent years and already plays a significant role in commercial tree plantations worldwide. Clonal breeding requires accurate assessments of genetic parameters, together with measurements of clonal productivity, stability, and adaptably. However, relevant studies for clones of Paulownia spp. genotypes are rare. We therefore conducted clonal tests on twenty Paulownia clones established at three sites in the temperate and subtropical regions of China. Trees were planted in a randomized block design, with four replications in each site, twenty plots in each block, and six to eight individuals of the same clone in each plot. We measured the trunk diameter at breast height (DBH), total trunk height (Ht), and individual stand volume of 7-year-old trees to estimate genetic parameters and analyze genotype–environment interactions. A combined analysis of variance indicated that clonal, site, and clone–site interactions significantly affected the three growth traits. Clonal heritability and individual heritability were 0.35–0.84 and 0.07–0.30, respectively. The phenotypic and genetic correlation coefficients among the growth traits were 0.46–0.93 and 0.85–0.99, respectively. There were extremely significant positive linear relationships between the best linear unbiased predictors for DBH and the original DBH values (R2 > 0.98). Clones 10, 2, 18, and 13 were selected for deployment based on a selection intensity of 1.4, GGE biplots, and the relative performance of harmonic means on genotypic values analysis. For these clones, the genetic gains in DBH, Ht, and volume were 18.05%, 21.46%, and 46.03%, respectively. These results provide useful information for the selection of Paulownia clones at the target sites and will provide a sound basis for improving Paulownia clonal breeding programs in the future.

show abstract

Section: Genetic Parameterssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Genetic Parameters and Genotype–Environment Interactions in Paulownia Clonal Tests in Temperate and Subtropical Regions of China

Zhao

Feng

Yang

et al. 2022

Forests

View full text Add to dashboard Cite

show abstract

“…One of the most important functions of this parameter in genetic breeding studies is its predictive role. Heritability is the main indicator of success in the selection process, with higher values indicating greater genetic gains (Braga et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Impacts of genetic selection on Sequoia sempervirens mini-cutting rooting and initial growth in the field

Lovatel

Rosa

Sá

et al. 2021

NZJFS

View full text Add to dashboard Cite

Background: Vegetative propagation from superior individuals allows multiple copies of plants that are genetically identical to the parent plant to be obtained. However, vegetative propagation success varies among individual genotypes, with some clones having more difficulty forming roots than others. The aim of this study was to evaluate the genetic gain in Sequoia sempervirens (D.Don) Endl. clones using parameters describing vegetative propagation success and initial growth in field. Methods: Vegetative propagation success was quantified for 16 clones in a completely randomised design consisting of 10 replications, each containing 10 mini-cuttings. At 90 days, rooting (RT), survival (SV) and the number of new shoots (NS) were evaluated. Performance after planting in the field was assessed using 13 clones from the previous experiment, arranged in linear parcels of 10 plants with 8 replicates. After 18 months, survival (SV), stem diameter (SD), height (H) and dominance breakdown (DB) were assessed. Estimates of variance components, heritability and genetic correlations were obtained using the Selegen-REML/BLUP software. Results: The mini cuttings of the 16 clones had a coefficient of genetic variation (CVgi%) of 32.32% for RT, 5.44% for SV and 5.35% for NS. The heritability of the total genetic effects (H2 g) for RT was 0.68. The clones with the best predicted genotypic classifications for the characteristics evaluated in the field were A116, A140 and A138 for SV, A126, A140 and A138 for SD, A138, A140 and A117 for H and A138, A228 and A116 for DB. Conclusions: In general, it was possible to obtain high genetic gain for rooting and medium gain for dendrometric variables in the field.

show abstract

“…Variables of a complex genetic nature are infl uenced by the environment, and their selection is usually complicated due to the signifi cant stochastic eff ects involved (Cruz, 2010); however, signifi cance may be found among these variables, permitting indirect selection. Heritability values for H and DBH in both the restricted and broad sense were low because of environmental infl uences, due to continuous distribution (Baldoni et al, 2020;Braga et al, 2020;Souza et al, 2020).…”

Section: Initial Plant Growth and Genetic Parameters Of Progeniesmentioning

confidence: 99%

SOIL RESISTANCE AND MULTIVARIATE ANALYSIS AS AN AUXILIARY METHOD FOR SELECTING Calophyllum brasiliense PROGENIES

et al. 2022

View full text Add to dashboard Cite

Precision silviculture is being developed to manage and improve Calophyllum brasiliense, a tree species associated with wet and swampy soils. This study estimated genetic parameters for growth traits in response to soil resistance as an auxiliary tool for identifying and selecting progenies adapted to water-saturated soils. This was undertaken in a progeny test of C. brasiliense in which 1,200 seedlings grown from seeds collected from a natural population were planted in a randomized complete block design for single-tree plots. Genetic statistical analysis was conducted using the REML/BLUP method. Significant differences (p<0.01) in diameter at breast height were observed among the progenies. The coefficients of genetic variation and heritability at the individual and progeny levels were low for diameter at breast height and height, indicating low genetic control for these traits, while high positive and significant genetic and phenotypic correlations were detected between diameter at breast height and height. Theoretical genetic gains and multivariate statistical analysis indicated three groups of progenies with different degrees of tolerance and adaptability to flooded soils, which could be useful in future breeding programs for this species, although further analysis at advanced ages is still required. The mean heights of tolerant and sensitive progenies were 12 and 58%, respectively, lower than the theoretical values, indicating that constant soil flooding is harmful to this species.

show abstract

Genetic parameters and genotype × environment interaction in Pinus taeda clonal tests

Cited by 17 publications

References 37 publications

Genetic Parameters and Genotype–Environment Interactions in Paulownia Clonal Tests in Temperate and Subtropical Regions of China

Genetic Parameters and Genotype–Environment Interactions in Paulownia Clonal Tests in Temperate and Subtropical Regions of China

Impacts of genetic selection on Sequoia sempervirens mini-cutting rooting and initial growth in the field

SOIL RESISTANCE AND MULTIVARIATE ANALYSIS AS AN AUXILIARY METHOD FOR SELECTING Calophyllum brasiliense PROGENIES

Contact Info

Product

Resources

About