Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations
Several apomictic Brachiaria (Trin.) Griseb. (syn. Urochloa P. Beauv.) species are commercially important tropical forage grasses, but little is known about the interspecific diversity and population structure within this genus. Previously published genus-level Brachiaria phylogenies were conducted...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Wiley
2017
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/88132 |
| _version_ | 1855529305971359744 |
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| author | Triviño, Narda Jimena Pérez, Juan Guillermo Recio, Maria Eugenia Ebina, Masumi Yamanaka, Naoki Tsuruta, Shin-ichi Ishitani, Manabu Worthington, Margaret |
| author_browse | Ebina, Masumi Ishitani, Manabu Pérez, Juan Guillermo Recio, Maria Eugenia Triviño, Narda Jimena Tsuruta, Shin-ichi Worthington, Margaret Yamanaka, Naoki |
| author_facet | Triviño, Narda Jimena Pérez, Juan Guillermo Recio, Maria Eugenia Ebina, Masumi Yamanaka, Naoki Tsuruta, Shin-ichi Ishitani, Manabu Worthington, Margaret |
| author_sort | Triviño, Narda Jimena |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Several apomictic Brachiaria (Trin.) Griseb. (syn. Urochloa P. Beauv.) species are commercially important tropical forage grasses, but little is known about the interspecific diversity and population structure within this genus. Previously published genus-level Brachiaria phylogenies were conducted with few genotypes and contradicted well-established morphological evidence and proven interspecific fertility in the B. brizantha (Hochst. ex A. Rich.) Stapf., B. decumbens Stapf., and B. ruziziensis (R. Germ. & C.M. Evrard) agamic complex. In this study, we characterized the genetic diversity and population structure of 261 genotypes from 14 Brachiaria species and a Panicum maximum Jacq. outgroup using 39 simple sequence repeat primers with 701 polymorphic bands. The genotypes included in the panel included germplasm accessions, commercial cultivars, and sexually reproducing breeding populations. Results of STRUCTURE, neighbor joining, unweighted pair group method with arithmetic mean, and multiple correspondence analyses confirmed the relatedness of the important commercial species B. brizantha, B. decumbens, and B. ruziziensis. Brachiaria decumbens was most closely related to B. ruziziensis, and the diploid sexual and tetraploid apomict B. decumbens accessions formed into two related but distinct groups. The close relationship between B. humidicola (Rendle) Schweick and B. dictyoneura (Figari. and De Not) Stapf. and the unique genetic makeup of the lone sexually reproducing B. humidicola accession were also corroborated by these results. Our findings largely supported morphology-based taxonomic groupings in Brachiaria and indicated that genus-level phylogenies are made more robust by the inclusion of many polymorphic markers and multiple genotypes from each species. |
| format | Journal Article |
| id | CGSpace88132 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace881322025-03-13T09:44:30Z Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations Triviño, Narda Jimena Pérez, Juan Guillermo Recio, Maria Eugenia Ebina, Masumi Yamanaka, Naoki Tsuruta, Shin-ichi Ishitani, Manabu Worthington, Margaret feed crops breeding brachiaria brizantha genetic markers marcadores genéticos mejora genotyping Several apomictic Brachiaria (Trin.) Griseb. (syn. Urochloa P. Beauv.) species are commercially important tropical forage grasses, but little is known about the interspecific diversity and population structure within this genus. Previously published genus-level Brachiaria phylogenies were conducted with few genotypes and contradicted well-established morphological evidence and proven interspecific fertility in the B. brizantha (Hochst. ex A. Rich.) Stapf., B. decumbens Stapf., and B. ruziziensis (R. Germ. & C.M. Evrard) agamic complex. In this study, we characterized the genetic diversity and population structure of 261 genotypes from 14 Brachiaria species and a Panicum maximum Jacq. outgroup using 39 simple sequence repeat primers with 701 polymorphic bands. The genotypes included in the panel included germplasm accessions, commercial cultivars, and sexually reproducing breeding populations. Results of STRUCTURE, neighbor joining, unweighted pair group method with arithmetic mean, and multiple correspondence analyses confirmed the relatedness of the important commercial species B. brizantha, B. decumbens, and B. ruziziensis. Brachiaria decumbens was most closely related to B. ruziziensis, and the diploid sexual and tetraploid apomict B. decumbens accessions formed into two related but distinct groups. The close relationship between B. humidicola (Rendle) Schweick and B. dictyoneura (Figari. and De Not) Stapf. and the unique genetic makeup of the lone sexually reproducing B. humidicola accession were also corroborated by these results. Our findings largely supported morphology-based taxonomic groupings in Brachiaria and indicated that genus-level phylogenies are made more robust by the inclusion of many polymorphic markers and multiple genotypes from each species. 2017-09 2017-10-04T19:34:29Z 2017-10-04T19:34:29Z Journal Article https://hdl.handle.net/10568/88132 en Open Access Wiley Triviño, Narda Jimena; Perez, Juan Guillermo; Recio, Maria Eugenia; Ebina, Masumi; Yamanaka, Naoki; Tsuruta, Shin-ichi; Ishitani, Manabu; Worthington, Margaret. 2017. Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations . Crop Science 57(5): 2633-2644. |
| spellingShingle | feed crops breeding brachiaria brizantha genetic markers marcadores genéticos mejora genotyping Triviño, Narda Jimena Pérez, Juan Guillermo Recio, Maria Eugenia Ebina, Masumi Yamanaka, Naoki Tsuruta, Shin-ichi Ishitani, Manabu Worthington, Margaret Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations |
| title | Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations |
| title_full | Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations |
| title_fullStr | Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations |
| title_full_unstemmed | Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations |
| title_short | Genetic Diversity and Population Structure of Brachiaria Species and Breeding Populations |
| title_sort | genetic diversity and population structure of brachiaria species and breeding populations |
| topic | feed crops breeding brachiaria brizantha genetic markers marcadores genéticos mejora genotyping |
| url | https://hdl.handle.net/10568/88132 |
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