Applications of molecular markers to the genetic improvement of<i>Camellia sinensis</i>L. (tea) – A review

Gunasekare, M. T. K.

doi:10.1080/14620316.2007.11512214

Cited by 13 publications

(9 citation statements)

References 68 publications

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“…These analyses identify heterozygotic loci are robust, repeatable, and independent of season, plant development or plant tissue and allow simultaneous selection for resistance (Lindhout 2002;Gunasekare 2007). Elfstrand et al (2001) investigated the defensin-like gene spi 1, isolated from Norway spruce, as a candidate gene to include in molecular breeding programmes.…”

Section: Molecular Breedingmentioning

confidence: 98%

“…single or linked molecular markers) involved in the defence responses of trees following fungal pathogen infection (Elfstrand et al 2001;Li and Asiegbu 2004;Asiegbu et al 2005a,b;Samils et al 2006). Detection and identification of such genes may assist in (i) increasing our understanding of variations in natural resistance, (ii) screening naturally occurring or conventionally bred genotypes expressing unique resistance genes and ⁄ or high levels of molecular markers that are closely linked to resistance genes or (iii) creating transgenic trees with increased resistance to phytopathogens including root pathogens (reviewed by Tang and Newton 2003;Gunasekare 2007).…”

Section: Molecular Breedingmentioning

confidence: 99%

“…The strength of molecular markers, marker-and gene-assisted selection (MAS and GAS, respectively) strategies is that they allow the breeder to strengthen and accelerate conventional tree-breeding programmes. These analyses identify heterozygotic loci are robust, repeatable, and independent of season, plant development or plant tissue and allow simultaneous selection for resistance (Lindhout 2002;Gunasekare 2007). Elfstrand et al (2001) investigated the defensin-like gene spi 1, isolated from Norway spruce, as a candidate gene to include in molecular breeding programmes.…”

Section: Molecular Breedingmentioning

confidence: 99%

“…Current knowledge of the molecular basis of the A. mangium-root-rot pathosystem is non-existent. The development of MAS and GAS techniques for pathogen resistance is a promising approach but its application will depend on the relative cost and expected return compared with conventional methods (Francia et al 2005;Gunasekare 2007).…”

Section: Molecular Breedingmentioning

confidence: 99%

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Management of fungal root‐rot pathogens in tropicalAcacia mangiumplantations

et al. 2008

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Acacia mangium is a fast-growing tree species. It is mainly planted in large monocultures for pulpwood in South-East Asia. Root rot has become the most economically damaging disease of this species with high tree mortality rates observed during second and third rotations. Two main types of root rots have been found in A. mangium, viz. brown root-rot and red-root disease caused by Phellinus spp. and Ganoderma spp., respectively. To assess the future management options for root rot of A. mangium, we review past and current disease-management strategies for root rot in different temperate and tropical industrial tree crops. The efficacies of a wide range of silvicultural, chemical and biological options are detailed, and their potential utilization in managing root rot of A. mangium is discussed. We conclude that the current gaps in knowledge regarding identification, biology and disease epidemiology of the root-rot pathogens will need to be addressed so that effective management options can be developed.

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Section: Molecular Breedingmentioning

confidence: 98%

Section: Molecular Breedingmentioning

confidence: 99%

Section: Molecular Breedingmentioning

confidence: 99%

Section: Molecular Breedingmentioning

confidence: 99%

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Management of fungal root‐rot pathogens in tropicalAcacia mangiumplantations

et al. 2008

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“…Currently, about 600 tea germplasm accessions are being maintained at the Tea Research Institute of Sri Lanka, Talawakelle, Sri Lanka [2]. However, these accessions are not adequately evaluated for biochemical, agronomic, and molecular traits [3,4]. Hence, tea crop improvement programmes are being practiced on a narrow genetic base.…”

Section: Introductionmentioning

confidence: 99%

Floral Diversity and Genetic Structure of Tea Germplasm of Sri Lanka

Ranatunga

Kottawa-Arachchi

Gunasekare³

et al. 2017

International Journal of Biodiversity

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The role of tea germplasm in crop improvement, though well recognized, yet lacks sufficient information depriving its optimum use. About 600 accessions are conserved as tea germplasm in Sri Lanka and only 4% have been frequently utilized in breeding. Floral morphological characters are useful descriptors for preliminary characterization of genetic resources and particularly pistil traits are considered as reliable criteria in taxonomical studies of higher plants. The objectives of the present study were to conduct a comprehensive analysis on floral diversity of tea germplasm to determine the nature and extent of genetic structure of tea germplasm and to categorize accessions into major taxa. Eighty-nine accessions from the tea germplasm were characterized using 16 floral traits. Results indicated presence of considerable variation among germplasm accessions. Accessions were categorized into five different groups based on the diversity of floral traits and highly discriminating accessions were identified based on the grouping pattern. Among the traits, pistil traits were highly variable compared to other traits. Tea germplasm is predominantly represented by Cambod type accessions (68%) followed by Assam types (20%). Availability of China type accessions is low. Gaps in the germplasm collection were identified and information generated can be used for decision making in future germplasm exploration missions and breeding programme.

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Tea Plant (Camellia sinensis) Breeding in Sri Lanka

Gunasekare

2012

Global Tea Breeding

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Applications of molecular markers to the genetic improvement ofCamellia sinensisL. (tea) – A review

Cited by 13 publications

References 68 publications

Management of fungal root‐rot pathogens in tropicalAcacia mangiumplantations

Management of fungal root‐rot pathogens in tropicalAcacia mangiumplantations

Floral Diversity and Genetic Structure of Tea Germplasm of Sri Lanka

Tea Plant (Camellia sinensis) Breeding in Sri Lanka

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