The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform
Glen L. Hartman - One of the best experts on this subject based on the ideXlab platform.
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inheritance of soybean aphid resistance in 21 soybean plant introductions
Theoretical and Applied Genetics, 2014Co-Authors: Perry B. Cregan, Curtis B Hill, Glen L. Hartman, Brian W DiersAbstract:Key Message The Rag2 region was frequently identified among 21 F 2 populations evaluated for soybean aphid resistance, and Dominant Gene action and single-Gene resistance were also commonly identified.
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Inheritance of soybean aphid resistance in 21 soybean plant introductions
Theoretical and Applied Genetics, 2014Co-Authors: Perry B. Cregan, Curtis B Hill, Glen L. Hartman, Brian W DiersAbstract:Key Message The Rag2 region was frequently identified among 21 F _ 2 populations evaluated for soybean aphid resistance, and Dominant Gene action and single-Gene resistance were also commonly identified. Abstract The soybean aphid [ Aphis glycines Matsumura (Hemiptera: Aphididae)] is one of the most important insect pests of soybean [ Glycine max (L.) Merr] in the northern USA and southern Canada, and four resistance loci ( Rag1 – rag4 ) have been discovered since the pest was identified in the USA in 2000. The objective of this research was to determine whether resistance expression in recently identified soybean aphid-resistant plant introductions (PIs) was associated with the four Rag loci using a collection of 21 F_2 populations. The F_2 populations were phenotyped with soybean aphid biotype 1, which is avirulent on plants having any of the currently identified Rag Genes, using choice tests in the greenhouse and were tested with Genetic markers linked to the four Rag loci. The phenotyping results indicate that soybean aphid resistance is controlled by a single Dominant Gene in 14 PIs, by two Genes in three PIs, and four PIs had no clear Mendelian inheritance patterns. Genetic markers flanking Rag2 were significantly associated with aphid resistance in 20 PIs, the Rag1 region was significantly identified in five PIs, and the Rag3 region was identified in one PI. These results show that single Dominant Gene action at the Rag2 region may be a major source for aphid resistance in the USDA soybean germplasm collection.
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soybean aphid resistance in soybean jackson is controlled by a single Dominant Gene
Crop Science, 2006Co-Authors: Curtis B Hill, Yan Li, Glen L. HartmanAbstract:The soybean aphid, Aphis glycines Matsumura, has become established as a serious pest of soybean, Glycine max (L.) Merr., since it was first found in North America in 2000 and has caused millions of dollars in economic losses. While the application of chemical insecticides is the only means to control the soybean aphid at present, Genetic resistance to the aphid was recently discovered in soybean. A single Dominant Gene named Rag1 that controls resistance to the soybean aphid was found in the cultivar Dowling. Another cultivar found to have strong antibiosis-type resistance to the soybean aphid was Jackson. The primary objective of this study was to determine the inheritance of resistance to the soybean aphid in Jackson. Segregation of resistance was analyzed in F2 and among F2–derived F3 (F2:3) families produced from crosses between Jackson and the susceptible soybean cultivar Loda. Segregation of F2 plants was 247 resistant to 97 susceptible and fit a 3:1 Genetic ratio (P 5 0.17). Segregation among F2:3 families was not clear because a number of susceptible F2 plants did not produce a sufficient amount of seed for progeny testing. Ignoring the susceptible class, the segregation of F2:3 families fit a 1:2 (all resistant/segregating) ratio. These results indicated that a single Dominant Gene controlled resistance in Jackson. There is no known Genetic relationship between Jackson and Dowling. The Genetic relationship between Rag1 in Dowling and the Gene in Jackson is unknown.
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a single Dominant Gene for resistance to the soybean aphid in the soybean cultivar dowling
Crop Science, 2006Co-Authors: Curtis B Hill, Yan Li, Glen L. HartmanAbstract:The soybean aphid (Aphis glycines Matsumura), a new pest of soybean [Glycine max (L.) Merr.], rapidly spread throughout North America after its arrival in 2000 and caused millions of dollars in economic losses. At present, the application of insecticides is the only means to control the soybean aphid. However, Genetic resistance to the aphid was recently discovered in soybean germplasm and the soybean cultivar Dowling was identified as having strong antibiosis-type aphid resistance. The objective of this study was to determine the inheritance of resistance to the soybean aphid in Dowling. Resistance in F1 ,F 2, and F2–derived F3 (F2:3) families from crosses between Dowling and the two susceptible soybean cultivars Loda and Williams 82 was analyzed. All F1 plants were resistant to the aphid. HeteroGeneity of segregation of F2 plants in 14 Dowling 3 Loda F2 families was nonsignificant (P 5 0.16), and pooled F2 data, with 132 resistant to 45 susceptible plants, fit a 3:1 ratio (P 5 0.90). F2 plants from Dowling 3 Williams 82 segregated 135 resistant to 44 susceptible, also fitting a 3:1 ratio (P 5 0.89). Segregation among the F2:3 families fit a 1:2:1 monogenic inheritance pattern. These results indicated that a single Dominant Gene named Rag1 controlled resistance in Dowling. The monogenic Dominant nature of resistance will enable breeders to rapidly convert existing susceptible cultivars to resistant cultivars using backcrossing procedures.
Brian W Diers - One of the best experts on this subject based on the ideXlab platform.
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inheritance of soybean aphid resistance in 21 soybean plant introductions
Theoretical and Applied Genetics, 2014Co-Authors: Perry B. Cregan, Curtis B Hill, Glen L. Hartman, Brian W DiersAbstract:Key Message The Rag2 region was frequently identified among 21 F 2 populations evaluated for soybean aphid resistance, and Dominant Gene action and single-Gene resistance were also commonly identified.
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Inheritance of soybean aphid resistance in 21 soybean plant introductions
Theoretical and Applied Genetics, 2014Co-Authors: Perry B. Cregan, Curtis B Hill, Glen L. Hartman, Brian W DiersAbstract:Key Message The Rag2 region was frequently identified among 21 F _ 2 populations evaluated for soybean aphid resistance, and Dominant Gene action and single-Gene resistance were also commonly identified. Abstract The soybean aphid [ Aphis glycines Matsumura (Hemiptera: Aphididae)] is one of the most important insect pests of soybean [ Glycine max (L.) Merr] in the northern USA and southern Canada, and four resistance loci ( Rag1 – rag4 ) have been discovered since the pest was identified in the USA in 2000. The objective of this research was to determine whether resistance expression in recently identified soybean aphid-resistant plant introductions (PIs) was associated with the four Rag loci using a collection of 21 F_2 populations. The F_2 populations were phenotyped with soybean aphid biotype 1, which is avirulent on plants having any of the currently identified Rag Genes, using choice tests in the greenhouse and were tested with Genetic markers linked to the four Rag loci. The phenotyping results indicate that soybean aphid resistance is controlled by a single Dominant Gene in 14 PIs, by two Genes in three PIs, and four PIs had no clear Mendelian inheritance patterns. Genetic markers flanking Rag2 were significantly associated with aphid resistance in 20 PIs, the Rag1 region was significantly identified in five PIs, and the Rag3 region was identified in one PI. These results show that single Dominant Gene action at the Rag2 region may be a major source for aphid resistance in the USDA soybean germplasm collection.
Shaobin Zhong - One of the best experts on this subject based on the ideXlab platform.
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Fine mapping of a Dominant Gene conferring resistance to spot blotch caused by a new pathotype of Bipolaris sorokiniana in barley
Theoretical and Applied Genetics, 2019Co-Authors: Rui Wang, Yueqiang Leng, Mingxia Zhao, Shaobin ZhongAbstract:Key message We fine-mapped and physically anchored a Dominant Gene ( Rbs7 ) conferring resistance to spot blotch caused by a new pathotype of Bipolaris sorokiniana in a genomic interval of 304 kb on barley chromosome 6H. Abstract Spot blotch, caused by Bipolaris sorokiniana , is an economically important disease on barley in the Upper Midwest region of the USA and Prairie Provinces of Canada. A new pathotype (pathotype 7, represented by isolate ND4008) of B. sorokiniana has been identified, which is highly virulent on barley cultivars with resistance to other pathotypes of the fungus. In this study, we fine-mapped a Dominant Gene conferring resistance to pathotype 7 in the barley line PI 235186. Genetic analysis of the F_1 and F_2 plants from a cross between PI 356741 (highly susceptible to ND4008) and PI 235186 (highly resistant to ND4008) indicated that a single Dominant Gene ( Rbs7 ) controls the resistance in PI 235186. This result was confirmed by Genetic analysis of the F_2:3 families and a recombinant inbred line (RIL) population derived from the same cross. Bulked segregant analysis using simple sequence repeat markers localized Rbs7 on the short arm of chromosome 6H. Additional DNA markers were developed from the 6H pseudomolecule sequence of barley cv. Morex and mapped to the genomic region carrying Rbs7 using the RIL population and F_2 recombinants derived from the PI 356741 × PI 235186 cross. Rbs7 was fine-mapped between two markers ( M13.06 and M13.37 ), which spans a physical distance of 304 kb on Morex chromosome 6H. These results provide a foundation for future cloning of the resistance Gene and development of user-friendly molecular markers that can be used for development of spot-blotch-resistant cultivars in barley breeding programs.
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Fine mapping of a Dominant Gene conferring resistance to spot blotch caused by a new pathotype of Bipolaris sorokiniana in barley.
Theoretical and Applied Genetics, 2018Co-Authors: Rui Wang, Yueqiang Leng, Mingxia Zhao, Shaobin ZhongAbstract:Key message We fine-mapped and physically anchored a Dominant Gene (Rbs7) conferring resistance to spot blotch caused by a new pathotype of Bipolaris sorokiniana in a genomic interval of 304 kb on barley chromosome 6H.
Curtis B Hill - One of the best experts on this subject based on the ideXlab platform.
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inheritance of soybean aphid resistance in 21 soybean plant introductions
Theoretical and Applied Genetics, 2014Co-Authors: Perry B. Cregan, Curtis B Hill, Glen L. Hartman, Brian W DiersAbstract:Key Message The Rag2 region was frequently identified among 21 F 2 populations evaluated for soybean aphid resistance, and Dominant Gene action and single-Gene resistance were also commonly identified.
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Inheritance of soybean aphid resistance in 21 soybean plant introductions
Theoretical and Applied Genetics, 2014Co-Authors: Perry B. Cregan, Curtis B Hill, Glen L. Hartman, Brian W DiersAbstract:Key Message The Rag2 region was frequently identified among 21 F _ 2 populations evaluated for soybean aphid resistance, and Dominant Gene action and single-Gene resistance were also commonly identified. Abstract The soybean aphid [ Aphis glycines Matsumura (Hemiptera: Aphididae)] is one of the most important insect pests of soybean [ Glycine max (L.) Merr] in the northern USA and southern Canada, and four resistance loci ( Rag1 – rag4 ) have been discovered since the pest was identified in the USA in 2000. The objective of this research was to determine whether resistance expression in recently identified soybean aphid-resistant plant introductions (PIs) was associated with the four Rag loci using a collection of 21 F_2 populations. The F_2 populations were phenotyped with soybean aphid biotype 1, which is avirulent on plants having any of the currently identified Rag Genes, using choice tests in the greenhouse and were tested with Genetic markers linked to the four Rag loci. The phenotyping results indicate that soybean aphid resistance is controlled by a single Dominant Gene in 14 PIs, by two Genes in three PIs, and four PIs had no clear Mendelian inheritance patterns. Genetic markers flanking Rag2 were significantly associated with aphid resistance in 20 PIs, the Rag1 region was significantly identified in five PIs, and the Rag3 region was identified in one PI. These results show that single Dominant Gene action at the Rag2 region may be a major source for aphid resistance in the USDA soybean germplasm collection.
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soybean aphid resistance in soybean jackson is controlled by a single Dominant Gene
Crop Science, 2006Co-Authors: Curtis B Hill, Yan Li, Glen L. HartmanAbstract:The soybean aphid, Aphis glycines Matsumura, has become established as a serious pest of soybean, Glycine max (L.) Merr., since it was first found in North America in 2000 and has caused millions of dollars in economic losses. While the application of chemical insecticides is the only means to control the soybean aphid at present, Genetic resistance to the aphid was recently discovered in soybean. A single Dominant Gene named Rag1 that controls resistance to the soybean aphid was found in the cultivar Dowling. Another cultivar found to have strong antibiosis-type resistance to the soybean aphid was Jackson. The primary objective of this study was to determine the inheritance of resistance to the soybean aphid in Jackson. Segregation of resistance was analyzed in F2 and among F2–derived F3 (F2:3) families produced from crosses between Jackson and the susceptible soybean cultivar Loda. Segregation of F2 plants was 247 resistant to 97 susceptible and fit a 3:1 Genetic ratio (P 5 0.17). Segregation among F2:3 families was not clear because a number of susceptible F2 plants did not produce a sufficient amount of seed for progeny testing. Ignoring the susceptible class, the segregation of F2:3 families fit a 1:2 (all resistant/segregating) ratio. These results indicated that a single Dominant Gene controlled resistance in Jackson. There is no known Genetic relationship between Jackson and Dowling. The Genetic relationship between Rag1 in Dowling and the Gene in Jackson is unknown.
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a single Dominant Gene for resistance to the soybean aphid in the soybean cultivar dowling
Crop Science, 2006Co-Authors: Curtis B Hill, Yan Li, Glen L. HartmanAbstract:The soybean aphid (Aphis glycines Matsumura), a new pest of soybean [Glycine max (L.) Merr.], rapidly spread throughout North America after its arrival in 2000 and caused millions of dollars in economic losses. At present, the application of insecticides is the only means to control the soybean aphid. However, Genetic resistance to the aphid was recently discovered in soybean germplasm and the soybean cultivar Dowling was identified as having strong antibiosis-type aphid resistance. The objective of this study was to determine the inheritance of resistance to the soybean aphid in Dowling. Resistance in F1 ,F 2, and F2–derived F3 (F2:3) families from crosses between Dowling and the two susceptible soybean cultivars Loda and Williams 82 was analyzed. All F1 plants were resistant to the aphid. HeteroGeneity of segregation of F2 plants in 14 Dowling 3 Loda F2 families was nonsignificant (P 5 0.16), and pooled F2 data, with 132 resistant to 45 susceptible plants, fit a 3:1 ratio (P 5 0.90). F2 plants from Dowling 3 Williams 82 segregated 135 resistant to 44 susceptible, also fitting a 3:1 ratio (P 5 0.89). Segregation among the F2:3 families fit a 1:2:1 monogenic inheritance pattern. These results indicated that a single Dominant Gene named Rag1 controlled resistance in Dowling. The monogenic Dominant nature of resistance will enable breeders to rapidly convert existing susceptible cultivars to resistant cultivars using backcrossing procedures.
Perry B. Cregan - One of the best experts on this subject based on the ideXlab platform.
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inheritance of soybean aphid resistance in 21 soybean plant introductions
Theoretical and Applied Genetics, 2014Co-Authors: Perry B. Cregan, Curtis B Hill, Glen L. Hartman, Brian W DiersAbstract:Key Message The Rag2 region was frequently identified among 21 F 2 populations evaluated for soybean aphid resistance, and Dominant Gene action and single-Gene resistance were also commonly identified.
-
Inheritance of soybean aphid resistance in 21 soybean plant introductions
Theoretical and Applied Genetics, 2014Co-Authors: Perry B. Cregan, Curtis B Hill, Glen L. Hartman, Brian W DiersAbstract:Key Message The Rag2 region was frequently identified among 21 F _ 2 populations evaluated for soybean aphid resistance, and Dominant Gene action and single-Gene resistance were also commonly identified. Abstract The soybean aphid [ Aphis glycines Matsumura (Hemiptera: Aphididae)] is one of the most important insect pests of soybean [ Glycine max (L.) Merr] in the northern USA and southern Canada, and four resistance loci ( Rag1 – rag4 ) have been discovered since the pest was identified in the USA in 2000. The objective of this research was to determine whether resistance expression in recently identified soybean aphid-resistant plant introductions (PIs) was associated with the four Rag loci using a collection of 21 F_2 populations. The F_2 populations were phenotyped with soybean aphid biotype 1, which is avirulent on plants having any of the currently identified Rag Genes, using choice tests in the greenhouse and were tested with Genetic markers linked to the four Rag loci. The phenotyping results indicate that soybean aphid resistance is controlled by a single Dominant Gene in 14 PIs, by two Genes in three PIs, and four PIs had no clear Mendelian inheritance patterns. Genetic markers flanking Rag2 were significantly associated with aphid resistance in 20 PIs, the Rag1 region was significantly identified in five PIs, and the Rag3 region was identified in one PI. These results show that single Dominant Gene action at the Rag2 region may be a major source for aphid resistance in the USDA soybean germplasm collection.