Mendelian inheritance of rust resistance to Melampsora larici‐epitea in crosses between Salix sachalinensis and S. viminalis

Pei, M. H.; Ruiz, C.; Shield, I.; Macalpine, W. J.; Lindegaard, Kevin; Bayón, Carlos; Karp, A.

doi:10.1111/j.1365-3059.2010.02317.x

Cited by 5 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A remarkable high genic diversity in resistance genes has been described in the related species P. trichocarpa where around 400 NBS class resistance genes have been found (Kohler et al 2008). In a recent study by Pei et al (2010), a Mendelian inheritance of rust resistance was indicated for major genes in hybrid crossings S. sachalinensis×S. viminalis.…”

Section: Discussionmentioning

confidence: 96%

QTL mapping of resistance to leaf rust in Salix

Samils

Rönnberg‐Wästljung

Stenlid

2011

Tree Genetics & Genomes

View full text Add to dashboard Cite

Genetic mapping of quantitative trait loci (QTL) for resistance to Melampsora leaf rust was performed in two willow families: the progeny from a backcross between Salix viminalis and a hybrid S. viminalis×Salix schwerinii (population S 1 ), and the F 1 progeny of a cross between two S. viminalis (population S 3 ). Disease levels were scored in the field for three consecutive years. In the laboratory, five different rust strains were sprayed onto leaf disks and the following resistance components were scored: latent period, diameter and number of uredinia, and flecking. One major QTL and 14 smaller were identified in the S 1 host population. One rust strain, that represents a Melampsora form with limited incidence on S. viminalis, showed lower aggressiveness to the S 1 host population together with a different pattern in QTLs. In the S 3 host population, we detected 13 QTLs for rust resistance, of which two were located to the same genomic regions as those found for the S 1 population. We showed that the strongest QTL cosegregated with a gene homologous to a known Toll/ interleukin receptor-nucleotide binding site-leucine-rich repeat resistance gene in poplar. The importance of the identified QTLs is discussed in relation to breeding for durable resistance.

show abstract

Section: Discussionmentioning

confidence: 96%

QTL mapping of resistance to leaf rust in Salix

Samils

Rönnberg‐Wästljung

Stenlid

2011

Tree Genetics & Genomes

View full text Add to dashboard Cite

show abstract

“…Rust pathotypes and genotype resistance in the UK has been studied, but there is poor understanding of the Melampsora pathotypes affecting willow species in North America [39,[44][45][46][47]. Previous studies have shown that Melampsora resistance is highly heritable and has already been exploited in breeding for rust resistance through hybridization with Salix schwerinii [44,46,[48][49][50].…”

Section: Rust Incidence and Beetle Damage And Specificitymentioning

confidence: 99%

Yield and Woody Biomass Traits of Novel Shrub Willow Hybrids at Two Contrasting Sites

et al. 2012

View full text Add to dashboard Cite

Shrub willow has great potential as a dedicated bioenergy crop, but commercialization and adoption by growers and end-users will depend upon the identification and selection of high-yielding cultivars with biomass chemistry and quality amenable to conversion to biofuels and bioenergy. In this study, critical traits for biomass production were evaluated among new genotypes of shrub willow produced through hybrid breeding. This study assessed the variation in yield, pest and disease resistance, biomass composition, and wood density in shrub willow, as well as the impact of genotypic and environmental factors on these particular phenotypes. Analysis of clonal genotypes established on two contrasting sites in New York State, Tully and Belleville, showed statistical differences by site for all of the traits. The greatest yield was observed at Belleville, NY, for two cultivars, 'Fish Creek' (41 Mgha −1 ) and 'Onondaga' (40 Mgha −1 ). Yields of Salix eriocephala genotypes were lowest, and they displayed susceptibility to rust and beetle damage. Variation in cellulose content in the stem biomass was controlled by environmental factors, with the majority of the genotypes displaying greater cellulose content at Belleville compared with Tully. In contrast, wood density was significantly greater at Tully than Belleville, and cellulose content was correlated with wood density. There were no significant correlations between biomass yield and density or any of the composition traits. These trials demonstrate that new genotypes produce improved yield and pest and disease resistance, with diverse compositional traits that can be matched with conversion technologies.

show abstract

“…Willow breeding has traditionally exploited the high genetic diversity and heterozygosity inherent among natural populations [7]. The main breeding strategies for willow in the USA, UK, and Sweden have been to improve biomass yield by capturing heterosis through the production of interspecific hybrids [8,9,4]; however, breeding for pest and disease resistance has also been of high priority due to detrimental effects on growth and production [10][11][12]. It is well documented that heterosis is a common phenomenon observed among hybrid progeny in many plant species and also among polyploid individuals [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Ploidy Level Affects Important Biomass Traits of Novel Shrub Willow (Salix) Hybrids

et al. 2014

View full text Add to dashboard Cite

Polyploidy is a common observation in the genus Salix, including some of the shrub willow species currently being bred as a potential bioenergy feedstock. Breeding of shrub willow has produced new species hybrids, among which a disproportionate number of high-yielding genotypes are triploid, produced from crosses between diploid and tetraploid parents. These novel hybrids display significant variation in biomass compositional quality, including differences according to ploidy. The triploid and tetraploid genotypes possess lower lignin content than diploid genotypes. Biomass composition was also significantly different across the 3-year growth cycle typical of bioenergy plantings. There were differences in syringyl/guaiacyl (S:G) lignin ratios among the 75 genotypes examined, in addition to significant correlations with willow growth traits, yield, and composition. These differences suggest that a long-term strategy of breeding for triploid progeny will generate cultivars with improved growth traits and wood composition for conversion to biofuels.

show abstract

Mendelian inheritance of rust resistance to Melampsora larici‐epitea in crosses between Salix sachalinensis and S. viminalis

Cited by 5 publications

References 24 publications

QTL mapping of resistance to leaf rust in Salix

QTL mapping of resistance to leaf rust in Salix

Yield and Woody Biomass Traits of Novel Shrub Willow Hybrids at Two Contrasting Sites

Ploidy Level Affects Important Biomass Traits of Novel Shrub Willow (Salix) Hybrids

Contact Info

Product

Resources

About