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Recent Developments in Molecular Genetic Breeding of Forest Trees

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: 28 May 2025 | Viewed by 780

Special Issue Editor

State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China
Interests: functional genome; signaling in seed dormancy; transcriptional regulation of cold and salinity stress in trees
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Forests represent a crucial terrestrial component of the Earth's biosphere. The vast genetic diversity among global forest tree species harbors traits of economic, ecological, and societal significance. The increasing availability of genomic resources, coupled with advances in gene editing and high-throughput phenotyping, has opened new avenues for forest tree improvement. The integration of genomic selection, marker-assisted breeding, and biotechnology has accelerated the development of varieties with enhanced growth, wood quality, stress resistance, and climate adaptability. These advances are especially pertinent as forests face unprecedented challenges from global environmental change, emerging pests and diseases, and growing demand for sustainable wood products and ecosystem services.

This Special Issue will focus on recent advances in molecular genetic breeding of forest trees, from fundamental genomics to practical applications. We welcome submissions of all types, including original research articles, reviews, and perspective papers addressing topics including, but not limited to: novel genomic tools and resources for tree breeding, applications of CRISPR-Cas9 and other gene editing technologies in forest trees, advances in marker-assisted selection and genomic prediction, identification and characterization of genes controlling important traits, molecular mechanisms of stress resistance and adaptation, development of biotechnology-based breeding strategies, and case studies of molecular breeding applications in different tree species.

Dr. Su Chen
Guest Editor

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Keywords

  • tree genetics
  • tree breeding
  • molecular breeding
  • genetic improvement

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Published Papers (1 paper)

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Review

22 pages, 2005 KiB  
Review
The Role of Phytohormones in Mediating Drought Stress Responses in Populus Species
by Sajid Ali, Sana Tahir, Syed Shaheer Hassan, Meiqi Lu, Xinyu Wang, Lai Thi Quynh Quyen, Wenbo Zhang and Su Chen
Int. J. Mol. Sci. 2025, 26(8), 3884; https://doi.org/10.3390/ijms26083884 - 19 Apr 2025
Viewed by 377
Abstract
Drought stress substantially impacts the development and viability of Populus spp., which are essential for forestry and bioenergy production. This review summarizes and describes the functions of phytohormones, such as abscisic acid, auxins, and ethylene, in modulating physiological and molecular responses to water [...] Read more.
Drought stress substantially impacts the development and viability of Populus spp., which are essential for forestry and bioenergy production. This review summarizes and describes the functions of phytohormones, such as abscisic acid, auxins, and ethylene, in modulating physiological and molecular responses to water scarcity. Drought-induced ABA-mediated stomatal closure and root extension are essential adaptation processes. Furthermore, auxin–ABA (abscisic acid) interactions augment root flexibility, whereas ethylene regulates antioxidant defenses to alleviate oxidative stress. The advantageous function of endophytic bacteria, specifically plant growth-promoting rhizobacteria (PGPR), can augment drought resistance in spruce trees by enhancing nutrient absorption and stimulating root development. Structural adaptations encompass modifications in root architecture, including enhanced root length and density, which augment water uptake efficiency. Similarly, Arbuscular Mycorrhizal Fungi (AMF) significantly enhance stress resilience in forest trees. AMF establishes symbiotic relationships with plant roots, improving water and nutrient uptake, particularly phosphorus, during drought conditions. Furthermore, morphological alterations at the root–soil interface enhance interaction with soil moisture reserves. This review examines the complex mechanisms by which these hormones influence plant responses to water shortage, aiming to offer insights into prospective techniques for improving drought tolerance in common tree species and highlights the importance of hormone control in influencing the adaptive responses of prominent trees to drought stress, providing significant implications for research and practical applications in sustainable forestry and agriculture. These findings lay the groundwork for improving drought tolerance in Populus spp. by biotechnological means and by illuminating the complex hormonal networks that confer drought resistance. Full article
(This article belongs to the Special Issue Recent Developments in Molecular Genetic Breeding of Forest Trees)
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