Mendelian inheritance of rust resistance to Melampsora larici-epitea in crosses between Salix sachalinensis and S. viminalis
Identifieur interne : 000E26 ( Main/Exploration ); précédent : 000E25; suivant : 000E27Mendelian inheritance of rust resistance to Melampsora larici-epitea in crosses between Salix sachalinensis and S. viminalis
Auteurs : M. H. Pei [Royaume-Uni] ; C. Ruiz [Royaume-Uni] ; I. Shield [Royaume-Uni] ; W. Macalpine [Royaume-Uni] ; K. Lindegaard [Royaume-Uni] ; C. Bayon [Royaume-Uni] ; A. Karp [Royaume-Uni]Source :
- Plant pathology [ 0032-0862 ] ; 2010.
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- Pascal (Inist)
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Abstract
Two F1, two F2 and two backcross (BC) full-sib families of Salix sachalinensis x S. viminalis were tested for resistance to two pathotypes of Melampsora larici-epitea in leaf-disc inoculation experiments. Two single-pustule isolates, VM and ST, belonging to pathotypes LET1 and LET5, respectively, were used in the tests. Disease was scored based on the number of uredinia, uredinial diameter and inoculum densities. Both F1 families were completely resistant to both VM and ST. Resistance to VM segregated at a 9:6:1 ratio in the F2 families and at a 1:2:1 ratio in the BC families, suggesting that two independently segregating genes controlled rust resistance, with resistance dominant over susceptibility. This also indicates incomplete dominance of the resistance alleles over the susceptibility to VM. For ST, the equivalent ratios were 3:1 and 1:1, showing that a single dominant gene was responsible for rust resistance. The broad sense heritabilities were >0.91 for uredinial diameter and 0.1-0.33 for the number of uredinia. There were significant overall correlations between data from inoculations with VM and those from inoculations with ST in the number of uredinia, uredinial diameter and disease scores (Spearman's rank correlation coefficients = 0.31-0.75).
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H." last="Pei">M. H. Pei</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Centre for Bioenergy and Climate Change, Rothamsted Research</s1><s2>Harpenden, AL5 2JQ</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Harpenden, AL5 2JQ</wicri:noRegion></affiliation></author><author><name sortKey="Ruiz, C" sort="Ruiz, C" uniqKey="Ruiz C" first="C." last="Ruiz">C. Ruiz</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Centre for Bioenergy and Climate Change, Rothamsted Research</s1><s2>Harpenden, AL5 2JQ</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Harpenden, AL5 2JQ</wicri:noRegion></affiliation></author><author><name sortKey="Shield, I" sort="Shield, I" uniqKey="Shield I" first="I." last="Shield">I. Shield</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Centre for Bioenergy and Climate Change, Rothamsted Research</s1><s2>Harpenden, AL5 2JQ</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Harpenden, AL5 2JQ</wicri:noRegion></affiliation></author><author><name sortKey="Macalpine, W" sort="Macalpine, W" uniqKey="Macalpine W" first="W." last="Macalpine">W. Macalpine</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Centre for Bioenergy and Climate Change, Rothamsted Research</s1><s2>Harpenden, AL5 2JQ</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Harpenden, AL5 2JQ</wicri:noRegion></affiliation></author><author><name sortKey="Lindegaard, K" sort="Lindegaard, K" uniqKey="Lindegaard K" first="K." last="Lindegaard">K. Lindegaard</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Long Ashton Research Station, Long Ashton</s1><s2>Bristol, BS41 9AF</s2><s3>GBR</s3><sZ>5 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Bristol, BS41 9AF</wicri:noRegion></affiliation></author><author><name sortKey="Bayon, C" sort="Bayon, C" uniqKey="Bayon C" first="C." last="Bayon">C. Bayon</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Centre for Bioenergy and Climate Change, Rothamsted Research</s1><s2>Harpenden, AL5 2JQ</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Harpenden, AL5 2JQ</wicri:noRegion></affiliation></author><author><name sortKey="Karp, A" sort="Karp, A" uniqKey="Karp A" first="A." last="Karp">A. Karp</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Centre for Bioenergy and Climate Change, Rothamsted Research</s1><s2>Harpenden, AL5 2JQ</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Harpenden, AL5 2JQ</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Plant pathology</title><title level="j" type="abbreviated">Plant pathol.</title><idno type="ISSN">0032-0862</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Plant pathology</title><title level="j" type="abbreviated">Plant pathol.</title><idno type="ISSN">0032-0862</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dominance</term><term>Fungus resistance</term><term>Genetic determinism</term><term>Incomplete</term><term>Inheritance(genetics)</term><term>Major gene</term><term>Parasitic rust</term><term>Plant pathology</term><term>Salix</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Hérédité</term><term>Résistance champignon</term><term>Incomplet</term><term>Dominance</term><term>Déterminisme génétique</term><term>Gène majeur</term><term>Phytopathologie</term><term>Rouille parasitaire</term><term>Salix</term><term>Melampsora epitea</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Two F<sub>1</sub>, two F<sub>2</sub> and two backcross (BC) full-sib families of Salix sachalinensis x S. viminalis were tested for resistance to two pathotypes of Melampsora larici-epitea in leaf-disc inoculation experiments. Two single-pustule isolates, VM and ST, belonging to pathotypes LET1 and LET5, respectively, were used in the tests. Disease was scored based on the number of uredinia, uredinial diameter and inoculum densities. Both F<sub>1</sub> families were completely resistant to both VM and ST. Resistance to VM segregated at a 9:6:1 ratio in the F<sub>2</sub> families and at a 1:2:1 ratio in the BC families, suggesting that two independently segregating genes controlled rust resistance, with resistance dominant over susceptibility. This also indicates incomplete dominance of the resistance alleles over the susceptibility to VM. For ST, the equivalent ratios were 3:1 and 1:1, showing that a single dominant gene was responsible for rust resistance. The broad sense heritabilities were >0.91 for uredinial diameter and 0.1-0.33 for the number of uredinia. There were significant overall correlations between data from inoculations with VM and those from inoculations with ST in the number of uredinia, uredinial diameter and disease scores (Spearman's rank correlation coefficients = 0.31-0.75).</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li></country></list><tree><country name="Royaume-Uni"><noRegion><name sortKey="Pei, M H" sort="Pei, M H" uniqKey="Pei M" first="M. H." last="Pei">M. H. Pei</name></noRegion><name sortKey="Bayon, C" sort="Bayon, C" uniqKey="Bayon C" first="C." last="Bayon">C. Bayon</name><name sortKey="Karp, A" sort="Karp, A" uniqKey="Karp A" first="A." last="Karp">A. Karp</name><name sortKey="Lindegaard, K" sort="Lindegaard, K" uniqKey="Lindegaard K" first="K." last="Lindegaard">K. Lindegaard</name><name sortKey="Macalpine, W" sort="Macalpine, W" uniqKey="Macalpine W" first="W." last="Macalpine">W. Macalpine</name><name sortKey="Ruiz, C" sort="Ruiz, C" uniqKey="Ruiz C" first="C." last="Ruiz">C. Ruiz</name><name sortKey="Shield, I" sort="Shield, I" uniqKey="Shield I" first="I." last="Shield">I. Shield</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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