Parâmetros genéticos de crescimento inicial e frutificação de Dipteryx alata Vogel em teste de progênie e espaçamento

Andrade, Henrique Sverzut Freire de; Baroni, Gabriel de Resende; Brancalion, Pedro Henrique Santin; Moraes, Mário Luiz Teixeira de; Silva, Paulo Roberto Arbex

doi:10.18671/scifor.v48n126.17

Cited by 4 publications

(1 citation statement)

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“…Conversely, when moderate to high heritability values are observed, greater genetic gain is expected by selection for a particular character (ZARUMA et al, 2015;CANUTO et al, 2016). This is expected as a result of the selection for the number of mini-cuttings rooted per mini-stump, a character that presented the highest heritability estimates (Table 2), corroborating the considerations regarding the correlation between the characters.…”

Section: Resultssupporting

confidence: 63%

Selection of Acacia mearnsii for mini-cutting propagation

Gazzana,

Avinio,

Tonetto

et al. 2024

Cienc. Rural

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Acacia mearnsii De Wild. (Black wattle) is a forest species with great social and economical importance for the southern region of Brazil. This species has multifunctional characteristics, being cultivated to produce tannin, cellulose and energy. This research identified black wattle genotypes with competence for adventitious rooting for mini-cutting propagation. Single-bud mini-cuttings were treated with IBA at a concentration of 2000 mg L-1. After 30 days of cultivation in a humid chamber, the mini-cuttings were evaluated for percentages of survival, rooting, number of roots, average length of the three largest roots, and the number of mini-cuttings rooted per mini-stump. The identification of the best genotypes was performed with the Selegen REML/BLUP software. Selection between and within black wattle progenies can be performed based on the number of rooted mini-cuttings, making it possible to select genotypes with high competence for adventitious rooting while maintaining genetic variability for new selection cycles to develop clones for vegetative propagation by mini-cutting.

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Section: Resultssupporting

confidence: 63%

Selection of Acacia mearnsii for mini-cutting propagation

Gazzana,

Avinio,

Tonetto

et al. 2024

Cienc. Rural

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Genetic parameters and promising provenances and progenies for enhanced silvicultural traits in Eremanthus erythropappus

de Almeida,

Oliveira,

Santos

et al. 2024

New Forests

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Genetic parameters and promising provenances and progenies for enhanced silvicultural traits in Eremanthus erythropappus

Almeida,

Oliveira,

Santos

et al. 2023

Preprint

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Eremanthus erythropappus, a species of economic importance for α-bisabolol production, has great potential for genetic improvement. However, limited knowledge on genetic parameters during the exploitation of commercial plantations hampers its progress. In this study, we estimated genetic parameters and correlations for silvicultural traits in a provenance and progenies test of E. erythropappus at 11 years of age, aiming to identify promising provenances and families. The experiment, conducted in Baependi, involved five provenances and 116 half-sib families in a complete randomized block design. Height (H), diameter at breast height (DBH), survival (SOB), and volume (Vol) were measured, and the REML/BLUP mixed model approach was used to estimate genetic parameters. Our results revealed significant genotype-level effects for all traits, except H at the provenance level. Narrow sense heritability ranged from 0.05 (SOB) to 0.17 (DBH), suggesting a substantial influence of environmental factors. Genotypic variation surpassed that of provenances, and positive phenotypic and genotypic correlations between growth traits were observed, ranging from moderate to strong. Notably, the provenances Itabirito and Delfim Moreira exhibited outstanding performance in terms of DBH and Vol. Furthermore, families 4, 6, 37, 118, and 124 emerged as top contenders for H, DBH, and Vol. Despite low heritability, selection strategies within and between provenances and families for silvicultural traits are viable. Importantly, high phenotypic and genotypic correlations allow for indirect selection, thus streamlining assessment efforts. These findings advance our understanding of genetic parameters providing valuable insights for the genetic improvement of E. erythropappus, fostering its sustainable utilization in various industries.

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Parâmetros genéticos de crescimento inicial e frutificação de Dipteryx alata Vogel em teste de progênie e espaçamento

Cited by 4 publications

References 0 publications

Selection of Acacia mearnsii for mini-cutting propagation

Selection of Acacia mearnsii for mini-cutting propagation

Genetic parameters and promising provenances and progenies for enhanced silvicultural traits in Eremanthus erythropappus

Genetic parameters and promising provenances and progenies for enhanced silvicultural traits in Eremanthus erythropappus

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