Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds
Seed dormancy (SD) is a key domestication trait closely related to preharvest sprouting tolerance. Wild and weedy rices (Oryza spp.) exhibit higher degrees of seed dormancy compared to the cultivated rice. Red rice (Oryza sativa L.), a major weed in the rice growing areas of the southern United Stat...
| Autores principales: | , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2012
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/165724 |
| _version_ | 1855524235995250688 |
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| author | Subudhi, Prasanta K. Parco, Arnold Singh, Pradeep K. DeLeon, Teresa Karan, Ratna Biradar, Hanamareddy Cohn, Marc A. Brar, Darshan S. Sasaki, Takuji |
| author_browse | Biradar, Hanamareddy Brar, Darshan S. Cohn, Marc A. DeLeon, Teresa Karan, Ratna Parco, Arnold Sasaki, Takuji Singh, Pradeep K. Subudhi, Prasanta K. |
| author_facet | Subudhi, Prasanta K. Parco, Arnold Singh, Pradeep K. DeLeon, Teresa Karan, Ratna Biradar, Hanamareddy Cohn, Marc A. Brar, Darshan S. Sasaki, Takuji |
| author_sort | Subudhi, Prasanta K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Seed dormancy (SD) is a key domestication trait closely related to preharvest sprouting tolerance. Wild and weedy rices (Oryza spp.) exhibit higher degrees of seed dormancy compared to the cultivated rice. Red rice (Oryza sativa L.), a major weed in the rice growing areas of the southern United States, was used to elucidate the genetic architecture of SD. Quantitative trait loci (QTL) analysis conducted in two recombinant inbred line (RIL) populations developed from the crosses involving two rice cultivars (Bengal and Cypress) and a red rice accession (PSRR‐1) revealed six to seven QTL for seed dormancy, which accounted for 49 to 52% of the total phenotypic variance. The magnitude of the QTL contribution to phenotypic variance was influenced by genetic backgrounds. The majority of QTL had minor effects, except the QTL linked to Rc and Sdr4. The genetic architecture for seed dormancy in U.S. red rice was distinct compared with the earlier reported weedy accessions. Four QTL were mapped onto similar positions in both populations. Both cultivars and red rice contributed alleles for increased SD. Most of the digenic epistatic interactions involved loci other than the QTL with main effects. The nucleotide polymorphisms at the Sdr4 locus could not explain the phenotypic variation for seed dormancy in our materials. The variation in SD among the rice cultivars could be attributed to segregation of minor QTL, which may be exploited to improve preharvest sprouting tolerance. |
| format | Journal Article |
| id | CGSpace165724 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1657242024-12-22T05:44:52Z Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds Subudhi, Prasanta K. Parco, Arnold Singh, Pradeep K. DeLeon, Teresa Karan, Ratna Biradar, Hanamareddy Cohn, Marc A. Brar, Darshan S. Sasaki, Takuji alleles epistasis genetic effects genetic polymorphism inbred lines phenotypes preharvest sprouting quantitative trait loci seed dormancy segregation varieties Seed dormancy (SD) is a key domestication trait closely related to preharvest sprouting tolerance. Wild and weedy rices (Oryza spp.) exhibit higher degrees of seed dormancy compared to the cultivated rice. Red rice (Oryza sativa L.), a major weed in the rice growing areas of the southern United States, was used to elucidate the genetic architecture of SD. Quantitative trait loci (QTL) analysis conducted in two recombinant inbred line (RIL) populations developed from the crosses involving two rice cultivars (Bengal and Cypress) and a red rice accession (PSRR‐1) revealed six to seven QTL for seed dormancy, which accounted for 49 to 52% of the total phenotypic variance. The magnitude of the QTL contribution to phenotypic variance was influenced by genetic backgrounds. The majority of QTL had minor effects, except the QTL linked to Rc and Sdr4. The genetic architecture for seed dormancy in U.S. red rice was distinct compared with the earlier reported weedy accessions. Four QTL were mapped onto similar positions in both populations. Both cultivars and red rice contributed alleles for increased SD. Most of the digenic epistatic interactions involved loci other than the QTL with main effects. The nucleotide polymorphisms at the Sdr4 locus could not explain the phenotypic variation for seed dormancy in our materials. The variation in SD among the rice cultivars could be attributed to segregation of minor QTL, which may be exploited to improve preharvest sprouting tolerance. 2012-11 2024-12-19T12:55:23Z 2024-12-19T12:55:23Z Journal Article https://hdl.handle.net/10568/165724 en Wiley Subudhi, Prasanta K.; Parco, Arnold; Singh, Pradeep K.; DeLeon, Teresa; Karan, Ratna; Biradar, Hanamareddy; Cohn, Marc A.; Brar, Darshan S. and Sasaki, Takuji. 2012. Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds. Crop Science, Volume 52 no. 6 p. 2564-2575 |
| spellingShingle | alleles epistasis genetic effects genetic polymorphism inbred lines phenotypes preharvest sprouting quantitative trait loci seed dormancy segregation varieties Subudhi, Prasanta K. Parco, Arnold Singh, Pradeep K. DeLeon, Teresa Karan, Ratna Biradar, Hanamareddy Cohn, Marc A. Brar, Darshan S. Sasaki, Takuji Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds |
| title | Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds |
| title_full | Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds |
| title_fullStr | Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds |
| title_full_unstemmed | Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds |
| title_short | Genetic architecture of seed dormancy in U.S. weedy rice in different genetic backgrounds |
| title_sort | genetic architecture of seed dormancy in u s weedy rice in different genetic backgrounds |
| topic | alleles epistasis genetic effects genetic polymorphism inbred lines phenotypes preharvest sprouting quantitative trait loci seed dormancy segregation varieties |
| url | https://hdl.handle.net/10568/165724 |
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