Genetic variability and predicted genetic gains for yield and laticifer system traits of rubber tree families

Oliveira, André Luís Bombonato de; Gouvêa, Lígia Regina Lima; Verardi, Cecília Khusala; Silva, Guilherme Augusto Peres; Gonçalves, P. S.

doi:10.1007/s10681-014-1256-4

Cited by 15 publications

(3 citation statements)

References 18 publications

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“…The literature also shows plant breeding projects in which base populations were composed of a small number of progenies without compromising their genetic variability. This finding is also confirmed by Gouvea et al (2013) and Oliveira et al (2014), who studied initial populations consisting of 22 and 30 progenies of rubber tree, respectively, and in studies by Fogaça et al (2012), in which the base population consisted of 24 progenies of daylily (Hemerocallis x hybrids Hort.). It should be remembered that one of the limiting factors of allocating a large number of progenies in experiments of perennial crops is the maintenance cost of this population during the 365 days of the year.…”

Section: Resultssupporting

confidence: 67%

Effective population size and genetic gain expected in a population of Coffea canephora

Mistro¹,

Resende

Fazuoli

et al. 2019

Crop Breed. Appl. Biotechnol.

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This work aimed to study the effective population size and genetic gain in a population of robusta coffee (Coffea canephora Pierre) and verify the possibility of using recurrent selection. The experiment comprised 25 treatments, consisting of 21 C. canephora progenies and four C. arabica (cultivars) grown in Brazil. The experimental design was a 5x5 quadruple balanced lattice, with 24 replications, with one plant per plot. Six harvests were performed in each plant. Statistical analysis was carried out using the mixed model methodology. The analysis showed high additive genetic variability, and the magnitude of the additive components prevailed over that of the dominance components. These facts revealed the plant population liability to undergo recurrent selection, whose expected genetic gains were high. Results suggest that the effective population size and inbreeding degree throughout recurrent selection cycles be monitored. During selective cycles, cloning with weak selection is required due to few progenies.

show abstract

Section: Resultssupporting

confidence: 67%

Effective population size and genetic gain expected in a population of Coffea canephora

Mistro¹,

Resende

Fazuoli

et al. 2019

Crop Breed. Appl. Biotechnol.

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“…The domestication of rubber tree starts directly from Wickham collections without interspecific hybridization. The difficulty to dissect the component traits of yield as well as the long asexual period, however, make the traditional breeding process of rubber tree time-consuming (>20–25 years) 14 , resulting in less than four times of manual guidance sexual recombinations in Hevea cultivars within 150 years to date. Nevertheless, the individual with favorite traits can easily be retained and propagated by bud grafting.…”

Section: Introductionmentioning

confidence: 99%

Genomic insight into domestication of rubber tree

Chao

Shi

et al. 2023

Nat Commun

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Understanding the genetic basis of rubber tree (Hevea brasiliensis) domestication is crucial for further improving natural rubber production to meet its increasing demand worldwide. Here we provide a high-quality H. brasiliensis genome assembly (1.58 Gb, contig N50 of 11.21 megabases), present a map of genome variations by resequencing 335 accessions and reveal domestication-related molecular signals and a major domestication trait, the higher number of laticifer rings. We further show that HbPSK5, encoding the small-peptide hormone phytosulfokine (PSK), is a key domestication gene and closely correlated with the major domestication trait. The transcriptional activation of HbPSK5 by myelocytomatosis (MYC) members links PSK signaling to jasmonates in regulating the laticifer differentiation in rubber tree. Heterologous overexpression of HbPSK5 in Russian dandelion (Taraxacum kok-saghyz) can increase rubber content by promoting laticifer formation. Our results provide an insight into target genes for improving rubber tree and accelerating the domestication of other rubber-producing plants.

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“…While the species continues to be exploited and rubber extracted in natural populations in the Amazon region, there are very few areas with high levels of productivity. These areas are based on the system proposed by Kageyama et al (2002) and the increased productivity is due to the selection of genotypes, initially conserved ex situ (OLIVEIRA et al, 2015;SOUZA et al, 2017), that enabled planting in a variety of agroecosystems, such as agroforestry (RIGHI et al, 2008;VIRGENS FILHO, 2014) and monocultures (GONÇALVES et al, 2011). However, successful domestication occurred outside of the species' center of origin in ecosystems where the fungus Microcylus ulei (Henn,) Arx does not occur.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and structure in ex situ conserved populations of Hevea brasiliensis

Silva¹,

Cambuim²,

Kubota³

et al. 2019

Sci. For.

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Genetic variability and predicted genetic gains for yield and laticifer system traits of rubber tree families

Cited by 15 publications

References 18 publications

Effective population size and genetic gain expected in a population of Coffea canephora

Effective population size and genetic gain expected in a population of Coffea canephora

Genomic insight into domestication of rubber tree

Genetic diversity and structure in ex situ conserved populations of Hevea brasiliensis

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