Host–pathogen relationship between <i>Salix</i> and <i>Melampsora</i> sheds light on the parentage of some biomass willows

Pei, M. H.; Hunter, T.; Royle, D. J.

doi:10.1046/j.1469-8137.1999.00318.x

Cited by 13 publications

(13 citation statements)

References 7 publications

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“…The AFLP® results shown here as well as what has been previously known from the specific relationships between willows and Melampsora rusts [46] suggest that the most recent morphological identification of particularly S. dasyclados accessions needs further revision. For instance, the accessions labelled as das0503, das0504, das0525, das0510, das0506, das0524, which are nearly identical, are susceptible to Melampsora capraearum, which infects only S. caprea, S. aurita and their hybrids such as S. × sericans (S. caprea × viminalis).…”

Section: Subgenus Vetrixmentioning

confidence: 57%

“…However, not all accessions (e.g. das0604) identified as S. dasyclados are susceptible to M. capraearum [46]. It is interesting to note that historically all these accessions, with a few exceptions, came to the NWC as hybrids.…”

Section: Subgenus Vetrixmentioning

confidence: 98%

“…Previous studies also support the unique nature of these species: (1) The size of the ITS1 region in S. triandra was found to be 223 bp, rather than 222 bp as found in all other species studied [32]; (2) diploid S. triandra has the smallest nuclear DNA amount registered [58]; (3) S. triandra is the only species known to date which harbours a unique species of rust, Melampsora amygdalinae Kleb. which completes its full five-sporestage life-cycle on willow [46]. There are some 30-40 species of Melampsora on Salix, each occurring on a specific range of willows.…”

Section: Salix Triandra and Subgenus Salixmentioning

confidence: 99%

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A Genetic Study of a Salix Germplasm Resource Reveals New Insights into Relationships Among Subgenera, Sections and Species

et al. 2008

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Genetic relationships among 154 genotypes, including 50 species, held within the UK National Willow Collection were analysed using nine primer combinations in an optimised fluorescent amplified fragment length polymorphism (AFLP®) protocol. The AFLP® data resolved relationships at all levels, from discriminating between closely related accessions to differentiating among majority of species, sections and subgenera. The neighbourjoining dendrogram split accessions into three major wellsupported clusters, two of which comprised species of the subgenera Vetrix and Salix. Surprisingly, the third (98% bootstrap support) comprised only Salix triandra accessions. The genetic similarity (GS) between S. triandra and Salix or Vetrix was similar (0.39 and 0.40, respectively) and greater than the genetic similarity between Salix and Vetrix (GS=0.57). Separate clustering of S. triandra is also supported by hierarchical analysis of molecular variance (AMOVA), that partitioned 31.4% of the total variance between these three groups, whereas only 16.3% was partitioned between the two subgenera. These results challenge all current classifications which assign S. triandra to subgenus Salix. Principal coordinate analysis gave corresponding results and facilitated interpretation of relationships among species within sections of the two subgenera, which are discussed. The study included 40 species which have been used in breeding, and the findings will facilitate the choice of parents and interpretation of the results of different crosses, on the basis of more accurate knowledge of genetic relationships. AFLPs® also detected identical genotypes (within the limits of AFLP® error) which should not be used as distinct parents in breeding programmes.

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Section: Subgenus Vetrixmentioning

confidence: 57%

Section: Subgenus Vetrixmentioning

confidence: 98%

Section: Salix Triandra and Subgenus Salixmentioning

confidence: 99%

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A Genetic Study of a Salix Germplasm Resource Reveals New Insights into Relationships Among Subgenera, Sections and Species

et al. 2008

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“…(S. cinerea · S. viminalis, see Pei et al 1999a), S. · mollissima Hoffm. (S. cinerea · S. viminalis, see Pei et al 1999a), S. · mollissima Hoffm.…”

Section: Willow Clones and Rust Isolatesunclassified

Rust resistance in Salix induced by inoculations with avirulent and virulent isolates of Melampsora larici‐epitea

et al. 2003

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Six Salix clones and four Melampsora larici-epitea isolates were used in two leaf-disc inoculation experiments to determine whether disease severity was affected by the presence of both virulent and avirulent rust genotypes. In the first experiment, an equal amount of urediniospores of a virulent isolate and an avirulent isolate was applied simultaneously using four levels of spore suspension. In the second, the willows were inoculated with one isolate first and then, after 3 days, with another using two spore concentrations. In the first experiment, overall rust spore production was reduced by 48.6% in inoculations with mixed inocula compared with that in the inoculations with single virulent isolates. In the second experiment, 20 of the 36 combinations involving pre-inoculations with avirulent isolates showed significant reduction in spore production. The suppressive effects on rust sporulation were more obvious at the higher inoculum densities and on the clones S. · calodendron and S. · mollissima ÔQ83Õ.

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“…Although the use of such resistance genes in crop plants would have been critical to the success of economically important plants in pre-pesticide times (Schoonhoven et al, 1998), it has received relatively little attention until recently. Pei et al, 1999) and chrysomelid beetles (e.g. The use of plant resistance is likely to be important in crops that are traditionally considered low input, such as willows grown as a biomass resource.…”

Section: Introductionmentioning

confidence: 99%

Host selection and performance of the giant willow aphid, Tuberolachnus salignus Gmelin – implications for pest management

Collins

Fellowes

Sage

et al. 2001

Agri and Forest Entomology

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1 The recent increase in planting of selected willow clones as energy crops for biomass production has resulted in a need to understand the relationship between commonly grown, clonally propagated genotypes and their pests. 2 For the ®rst time, we present a study of the interactions of six willow clones and a previously unconsidered pest, the giant willow aphid Tuberolachnus salignus. 3 Tuberolachnus salignus alatae displayed no preference between the clones, but there was genetic variation in resistance between the clones; Q83 was the most resistant and led to the lowest reproductive performance in the aphid 4 Maternal effects buffered changes in aphid performance. On four tested willow clones fecundity of ®rst generation aphids on the new host clone was intermediate to that of the second generation and that of the clone used to maintain the aphids in culture. 5 In the ®eld, patterns of aphid infestation were highly variable between years, with the duration of attack being up to four times longer in 1999. In both years there was a signi®cant effect of willow clone on the intensity of infestation. However, whereas Orm had the lowest intensity of infestation in the ®rst year, Dasyclados supported a lower population level than other monitored clones in the second year.

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Host–pathogen relationship between Salix and Melampsora sheds light on the parentage of some biomass willows

Cited by 13 publications

References 7 publications

A Genetic Study of a Salix Germplasm Resource Reveals New Insights into Relationships Among Subgenera, Sections and Species

A Genetic Study of a Salix Germplasm Resource Reveals New Insights into Relationships Among Subgenera, Sections and Species

Rust resistance in Salix induced by inoculations with avirulent and virulent isolates of Melampsora larici‐epitea

Host selection and performance of the giant willow aphid, Tuberolachnus salignus Gmelin – implications for pest management

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