Predicted genetic gains for growth traits and wood resistance in Pinus maximinoi and Pinus tecunumanii

Perek, Matheus; Hodge, Gary R.; Tambarussi, Evandro Vagner; Biernaski, Fabrício Antonio; Acosta, Juan J.

doi:10.1590/1984-70332022v22n2a23

Cited by 6 publications

(4 citation statements)

References 16 publications

(14 reference statements)

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“…Selecting by volume barely in uenced the two wood quality traits evaluated here, though the literature contains examples in the literature of selection by volume that affect both traits positively (Perek et al 2022) and negatively (Hayatgheibi et al 2017). In our work, we identi ed a minimum number of families to select based on either wood quality or volume, to avoid decreases in non-selected traits.…”

mentioning

confidence: 88%

“…Selection for multiple traits in breeding programs is common, but the genetic gains for some interesting traits are frequently reduced and in uenced by the breeder's selection criteria (Perek et al 2022). Before including a wood quality trait as a selection criterion in the Galician breeding program for P. pinaster, its genetic parameters and interactions with yield traits such as volume, straightness and tree slenderness must be studied to avoid yield loss.…”

Section: Introductionmentioning

confidence: 99%

“…This strategy has been studied by some authors, who report positive genetic gains for all selected and non-selected traits (Xiao et al 2021). Other available strategies such as the selection index could prove interesting to study in future works (Isik et al 2017;Perek et al 2022).…”

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confidence: 99%

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The feasibility of adding wood quality traits as selection criteria in the Galician Pinus pinaster Aiton breeding program: case study

Torres-Sánchez,

Prada,

Díaz

2024

Eur J Forest Res

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Pinus pinaster is a very important species for the Galician wood industry. A genetic breeding program was started in the 1980s to select plus trees based on growth and straightness. In this study, we estimated genetic parameters, juvenile-mature correlations and genetic gains in basic density (BD) and the dynamic modulus of elasticity (MOE d ) in Galician breeding families, as well as their relation to volume, straightness, and tree slenderness. All traits were measured at a tree age of 12 years in three half-sib progeny trials. Wood quality traits were also measured at 24 years in two other trials. All progeny trials followed a randomized complete block design and the data were analyzed using several mixed-model approaches. The individual heritability of MOE d remained stable at both ages (~ 0.39) but decreased with age for BD (from 0.44 at age 12 to 0.24 at age 24). The high juvenile-mature correlations (0.51 for BD, 0.57 for MOE d ) observed support the viability of early selection for both traits at 12 years. Both wood quality traits correlated positively with each other and weakly with volume, straightness and tree slenderness. Selecting a minimum number of the best families, based on volume or any wood quality trait, would generate genetic gains for the selecting trait and prevent genetic losses of non-selecting traits. We also identi ed speci c families showing positive genetic gains for all traits. The research indicates that either or both of these wood quality traits could be included as new selection criteria in the Galician breeding program.

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confidence: 88%

Section: Introductionmentioning

confidence: 99%

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The feasibility of adding wood quality traits as selection criteria in the Galician Pinus pinaster Aiton breeding program: case study

Torres-Sánchez,

Prada,

Díaz

2024

Eur J Forest Res

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“…In coniferous timber, tracheids made up more than 90% of the wood volume, making wood tracheid morphology a crucial indicator of the nature of coniferous timber. Studying the variation in wood tracheid morphology was essential for improving the quality and efficient use of wood fibers [3,4]. Leaves were vital organs for plants to acquire and utilize survival resources through photosynthesis, respiration, and transpiration.…”

Section: Introductionmentioning

confidence: 99%

Discrepancies and Evaluation of Needle-Leaf and Tracheid Traits of Qinhai Spruce in Qilian Mountains, Northwest China

Zhao,

Xu,

et al. 2024

Forests

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Phenotypic variation analysis and comprehensive evaluation are important tools for selecting provenances of forest trees, which, in turn, is crucial for genetic improvement of forest trees. The study analyzed eight needle-leaf and fourteen tracheid trait indexes of ten provenances of Qinghai spruce forest stands. Multiple comparisons, correlation analysis, cluster analysis, and principal component analysis were used to evaluate the differences in needle-leaf and tracheid traits among the different provenances. The study found significant differences in the needle-leaf and tracheid traits among the provenances. All traits included 50 pairs of positive and 26 pairs of negative correlations. The coefficient of variation for the tracheid trait (18.86%) was higher than that for the needle-leaf trait (17.20%). A comprehensive evaluation of needle-leaf and tracheid traits was conducted using principal component analysis. The study demonstrated that the degree of variation in needle-leaf and tracheid traits among the provenances of Qinghai spruce was extensive, with a multitude of sources of variation. Therefore, it is crucial to strengthen the selection of good provenances in the early seed selection process. The results of the comprehensive evaluation can be utilized as a foundation for the selection of good provenances for carbon sequestration and timber properties.

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Synergistic effects of L-glutamine and inorganic nitrogen molar ratios enhance the induction of somatic embryogenesis of Pinus maximinoi H.E. Moore

Nzama,

Myburg,

Hills

2024

Plant Cell Tiss Organ Cult

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Clonal breeding programs of Pinus maximinoi require the establishment of a robust somatic embryogenesis (SE) protocol to produce enough cell lines to accelerate the effective continuous deployment of elite planting stocks to research and commercial compartments. Somatic embryogenesis was induced from immature zygotic embryo explants enclosed in megagametophytes of P. maximinoi collected from two plantations located in different climatic conditions. Cones were collected during the winter months from July to August and the influence of seed family, cone collection date and culture medium formulation, with emphasis on the organic and inorganic nitrogen supply, were studied. Ammonium to nitrate molar ratios of 1:1 and 1:2 in modified Litvay’s medium (mLV) produced the highest numbers of extrusions, while a 1:4 ratio mostly produced unhealthy, non-embryogenic extrusions. The formation of a tissue showing a rapidly-proliferating, spiky morphotype was produced in a medium supplemented with 1.5 g/L of L-glutamine. Morphologically advanced cultures with nodular structures were produced in megagametophytes from both plantations in a 1:2 NH4+:NO3− medium regardless of L-glutamine supplementation levels. The optimal medium for P. maximinoi SE induction contained a 1:2 NH4+:NO3− molar ratio with 1.5 g/L L-glutamine. The synergy between the molar ratio of NH4+:NO3− and L-glutamine resulted in the highest numbers of extrusions. The overall inductive competence window for somatic embryogenic response in P. maximinoi was determined to be from the second week of July to the first week of August for both plantations. The “peak” period was in the fourth week of July 2022. The success of the SE technology in P. maximinoi seed families is determined by the optimal inductive competence window of the immature megagametophytes enclosing zygotic embryos and the chemical composition of the induction medium in terms of the ammonium to nitrate molar ratio and the concentration of the L-glutamine used.

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Predicted genetic gains for growth traits and wood resistance in Pinus maximinoi and Pinus tecunumanii

Cited by 6 publications

References 16 publications

The feasibility of adding wood quality traits as selection criteria in the Galician Pinus pinaster Aiton breeding program: case study

The feasibility of adding wood quality traits as selection criteria in the Galician Pinus pinaster Aiton breeding program: case study

Discrepancies and Evaluation of Needle-Leaf and Tracheid Traits of Qinhai Spruce in Qilian Mountains, Northwest China

Synergistic effects of L-glutamine and inorganic nitrogen molar ratios enhance the induction of somatic embryogenesis of Pinus maximinoi H.E. Moore

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