QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava
We evaluated cassava bacterial blight (CBB) infection in an pair-cross population of 150 individuals derived from an intra-specific cross between two non-inbred cassava (Manihot esculenta Crantz) lines. The replicated trials were carried out in the field under high disease pressure over two consecut...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2001
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/43988 |
| _version_ | 1855532307033620480 |
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| author | Jorge, V. Fregene, Martin A. Velez, C.M. Duque E., Myriam Cristina Tohme, Joseph M. Verdier, Valerie M. |
| author_browse | Duque E., Myriam Cristina Fregene, Martin A. Jorge, V. Tohme, Joseph M. Velez, C.M. Verdier, Valerie M. |
| author_facet | Jorge, V. Fregene, Martin A. Velez, C.M. Duque E., Myriam Cristina Tohme, Joseph M. Verdier, Valerie M. |
| author_sort | Jorge, V. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | We evaluated cassava bacterial blight (CBB) infection in an pair-cross population of 150 individuals derived from an intra-specific cross between two non-inbred cassava (Manihot esculenta Crantz) lines. The replicated trials were carried out in the field under high disease pressure over two consecutive crop cycles. Evaluations were conducted at 4 and 7 months after planting for the two cycles. Simple regression analysis and the nonparametric Kruskal-Wallis rank-sum test revealed that eight quantitative trait loci (QTLs) were involved in resistance. We detected changes in QTLs from crop cycle to crop cycle. The pathogen population (Xanthomonas axonopodis pv. manihotis) was also monitored over the period, using a restriction fragment length polymorphism probe and pathogenic tests. Changes in QTL detection over the 2 years could be correlated with changes in pathogen population structure. One QTL, located in linkage group D, was conserved over the two crop cycles, and in field to greenhouse evaluations. This study thus identified molecular markers useful for marker assisted-selection, a technique that can accelerate the long, multiple-season process of breeding for CBB resistance. |
| format | Journal Article |
| id | CGSpace43988 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2001 |
| publishDateRange | 2001 |
| publishDateSort | 2001 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace439882024-08-27T10:36:35Z QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava Jorge, V. Fregene, Martin A. Velez, C.M. Duque E., Myriam Cristina Tohme, Joseph M. Verdier, Valerie M. manihot esculenta xanthomonas disease resistance genetic markers field resistance quantitative trait loci bacterial blight marker-assisted selection resistencia a la enfermedad marcadores genéticos We evaluated cassava bacterial blight (CBB) infection in an pair-cross population of 150 individuals derived from an intra-specific cross between two non-inbred cassava (Manihot esculenta Crantz) lines. The replicated trials were carried out in the field under high disease pressure over two consecutive crop cycles. Evaluations were conducted at 4 and 7 months after planting for the two cycles. Simple regression analysis and the nonparametric Kruskal-Wallis rank-sum test revealed that eight quantitative trait loci (QTLs) were involved in resistance. We detected changes in QTLs from crop cycle to crop cycle. The pathogen population (Xanthomonas axonopodis pv. manihotis) was also monitored over the period, using a restriction fragment length polymorphism probe and pathogenic tests. Changes in QTL detection over the 2 years could be correlated with changes in pathogen population structure. One QTL, located in linkage group D, was conserved over the two crop cycles, and in field to greenhouse evaluations. This study thus identified molecular markers useful for marker assisted-selection, a technique that can accelerate the long, multiple-season process of breeding for CBB resistance. 2001-03 2014-10-02T08:33:03Z 2014-10-02T08:33:03Z Journal Article https://hdl.handle.net/10568/43988 en Limited Access Springer |
| spellingShingle | manihot esculenta xanthomonas disease resistance genetic markers field resistance quantitative trait loci bacterial blight marker-assisted selection resistencia a la enfermedad marcadores genéticos Jorge, V. Fregene, Martin A. Velez, C.M. Duque E., Myriam Cristina Tohme, Joseph M. Verdier, Valerie M. QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava |
| title | QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava |
| title_full | QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava |
| title_fullStr | QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava |
| title_full_unstemmed | QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava |
| title_short | QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava |
| title_sort | qtl analysis of field resistance to xanthomonas axonopodis pv manihotis in cassava |
| topic | manihot esculenta xanthomonas disease resistance genetic markers field resistance quantitative trait loci bacterial blight marker-assisted selection resistencia a la enfermedad marcadores genéticos |
| url | https://hdl.handle.net/10568/43988 |
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