Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage
Salinity significantly reduces global rice yield, especially in Eastern and Southern Africa, necessitating the development of salinity-tolerant varieties. We collected and analyzed 201 rice varieties, including Tanzanian landraces. Using 1k-RiCA SNP markers, we found that 36 out of 201 genotypes pos...
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Informa UK Limited
2024
|
| Acceso en línea: | https://hdl.handle.net/10568/163806 |
| _version_ | 1855541086578016256 |
|---|---|
| author | Lutambi, Kefrine Kennedy Henry, Amelia De Ocampo, Marjorie Chebotarov, Dmytro Pedersen, Ole Nchimbi-Msolla, Susan Kilasi, Newton L. |
| author_browse | Chebotarov, Dmytro De Ocampo, Marjorie Henry, Amelia Kilasi, Newton L. Lutambi, Kefrine Kennedy Nchimbi-Msolla, Susan Pedersen, Ole |
| author_facet | Lutambi, Kefrine Kennedy Henry, Amelia De Ocampo, Marjorie Chebotarov, Dmytro Pedersen, Ole Nchimbi-Msolla, Susan Kilasi, Newton L. |
| author_sort | Lutambi, Kefrine Kennedy |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Salinity significantly reduces global rice yield, especially in Eastern and Southern Africa, necessitating the development of salinity-tolerant varieties. We collected and analyzed 201 rice varieties, including Tanzanian landraces. Using 1k-RiCA SNP markers, we found that 36 out of 201 genotypes possessed the Saltol allele, a marker for salinity tolerance. Only two genotypes, K5 and Intsindagira bigega, were both phenotypically tolerant and had the Saltol allele. Interestingly, 16 genotypes without Saltol showed salinity tolerance, suggesting other salinity tolerance QTLs. The distribution of Saltol and phenotypically tolerant genotypes varied across Tanzanian agro-ecological zones, with the Coastal Zone showing a higher proportion of tolerant genotypes, possibly due to farmer selection pressure. However, ancestral population proportion correlated with decreased salinity tolerance. This study highlights the complex relationship between environmental factors and population structure in shaping the genetic and phenotypic composition of landraces. The identified tolerant genotypes could be utilized in breeding for new salinity-tolerant-rice varieties |
| format | Journal Article |
| id | CGSpace163806 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Informa UK Limited |
| publisherStr | Informa UK Limited |
| record_format | dspace |
| spelling | CGSpace1638062025-02-18T09:43:28Z Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage Lutambi, Kefrine Kennedy Henry, Amelia De Ocampo, Marjorie Chebotarov, Dmytro Pedersen, Ole Nchimbi-Msolla, Susan Kilasi, Newton L. Salinity significantly reduces global rice yield, especially in Eastern and Southern Africa, necessitating the development of salinity-tolerant varieties. We collected and analyzed 201 rice varieties, including Tanzanian landraces. Using 1k-RiCA SNP markers, we found that 36 out of 201 genotypes possessed the Saltol allele, a marker for salinity tolerance. Only two genotypes, K5 and Intsindagira bigega, were both phenotypically tolerant and had the Saltol allele. Interestingly, 16 genotypes without Saltol showed salinity tolerance, suggesting other salinity tolerance QTLs. The distribution of Saltol and phenotypically tolerant genotypes varied across Tanzanian agro-ecological zones, with the Coastal Zone showing a higher proportion of tolerant genotypes, possibly due to farmer selection pressure. However, ancestral population proportion correlated with decreased salinity tolerance. This study highlights the complex relationship between environmental factors and population structure in shaping the genetic and phenotypic composition of landraces. The identified tolerant genotypes could be utilized in breeding for new salinity-tolerant-rice varieties 2024-12-31 2024-12-19T12:53:02Z 2024-12-19T12:53:02Z Journal Article https://hdl.handle.net/10568/163806 en Open Access Informa UK Limited Lutambi, Kefrine Kennedy; Henry, Amelia; De Ocampo, Marjorie; Chebotarov, Dmytro; Pedersen, Ole; Nchimbi-Msolla, Susan and Kilasi, Newton L. 2024. Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage. Journal of Plant Interactions, Volume 19, no. 1 |
| spellingShingle | Lutambi, Kefrine Kennedy Henry, Amelia De Ocampo, Marjorie Chebotarov, Dmytro Pedersen, Ole Nchimbi-Msolla, Susan Kilasi, Newton L. Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage |
| title | Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage |
| title_full | Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage |
| title_fullStr | Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage |
| title_full_unstemmed | Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage |
| title_short | Genotypic screening for salinity tolerance of rice genotypes from Eastern and Southern Africa at seedling stage |
| title_sort | genotypic screening for salinity tolerance of rice genotypes from eastern and southern africa at seedling stage |
| url | https://hdl.handle.net/10568/163806 |
| work_keys_str_mv | AT lutambikefrinekennedy genotypicscreeningforsalinitytoleranceofricegenotypesfromeasternandsouthernafricaatseedlingstage AT henryamelia genotypicscreeningforsalinitytoleranceofricegenotypesfromeasternandsouthernafricaatseedlingstage AT deocampomarjorie genotypicscreeningforsalinitytoleranceofricegenotypesfromeasternandsouthernafricaatseedlingstage AT chebotarovdmytro genotypicscreeningforsalinitytoleranceofricegenotypesfromeasternandsouthernafricaatseedlingstage AT pedersenole genotypicscreeningforsalinitytoleranceofricegenotypesfromeasternandsouthernafricaatseedlingstage AT nchimbimsollasusan genotypicscreeningforsalinitytoleranceofricegenotypesfromeasternandsouthernafricaatseedlingstage AT kilasinewtonl genotypicscreeningforsalinitytoleranceofricegenotypesfromeasternandsouthernafricaatseedlingstage |