Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava
Interspecific crosses of five cultivated cassava varieties (2n=36) were made with two related Manihot species, M. epruinosa (2n=36) and M. glaziovii (2n=36). From these diploid interspecific crosses, four spontaneous tetraploids (2n=4x=72) and two triploids (2n=3x=54) were isolated for the first tim...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Springer
1990
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/101857 |
| _version_ | 1855523753173188608 |
|---|---|
| author | Hahn, S.K. Bai, K.V. Asiedu, Robert |
| author_browse | Asiedu, Robert Bai, K.V. Hahn, S.K. |
| author_facet | Hahn, S.K. Bai, K.V. Asiedu, Robert |
| author_sort | Hahn, S.K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Interspecific crosses of five cultivated cassava varieties (2n=36) were made with two related Manihot species, M. epruinosa (2n=36) and M. glaziovii (2n=36). From these diploid interspecific crosses, four spontaneous tetraploids (2n=4x=72) and two triploids (2n=3x=54) were isolated for the first time in cassava. Occurrence of relatively high frequencies (0.1%–35.6%) of 2n pollen and of apomixis seems to be associated with sexual polyploidization. The tetraploids and triploids were very vigorous and one of the tetraploids performed as well as the best variety in uniform yield trials conducted in Nigeria. These spontaneous polypoloids provide greater genetic variation and offer an opportunity to breed radically new cassava varieties. Approaches for isolating and utilizing the polyploid cassava clones for varietal and population improvement are discussed. |
| format | Journal Article |
| id | CGSpace101857 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1990 |
| publishDateRange | 1990 |
| publishDateSort | 1990 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1018572024-08-27T10:35:49Z Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava Hahn, S.K. Bai, K.V. Asiedu, Robert cassava polyploidy pollen apomixis Interspecific crosses of five cultivated cassava varieties (2n=36) were made with two related Manihot species, M. epruinosa (2n=36) and M. glaziovii (2n=36). From these diploid interspecific crosses, four spontaneous tetraploids (2n=4x=72) and two triploids (2n=3x=54) were isolated for the first time in cassava. Occurrence of relatively high frequencies (0.1%–35.6%) of 2n pollen and of apomixis seems to be associated with sexual polyploidization. The tetraploids and triploids were very vigorous and one of the tetraploids performed as well as the best variety in uniform yield trials conducted in Nigeria. These spontaneous polypoloids provide greater genetic variation and offer an opportunity to breed radically new cassava varieties. Approaches for isolating and utilizing the polyploid cassava clones for varietal and population improvement are discussed. 1990-04 2019-06-25T17:09:16Z 2019-06-25T17:09:16Z Journal Article https://hdl.handle.net/10568/101857 en Limited Access Springer Hahn, S.K., Bai, K.V. & Asiedu, R. (1990). Tetraploids, triploids, and 2n pollen from diploid interspecific crosses with cassava. Theoretical and Applied Genetics, 79(4), 433-439. |
| spellingShingle | cassava polyploidy pollen apomixis Hahn, S.K. Bai, K.V. Asiedu, Robert Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava |
| title | Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava |
| title_full | Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava |
| title_fullStr | Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava |
| title_full_unstemmed | Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava |
| title_short | Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava |
| title_sort | tetraploids triploids and 2n pollen from diploid interspecific crosses with cassava |
| topic | cassava polyploidy pollen apomixis |
| url | https://hdl.handle.net/10568/101857 |
| work_keys_str_mv | AT hahnsk tetraploidstriploidsand2npollenfromdiploidinterspecificcrosseswithcassava AT baikv tetraploidstriploidsand2npollenfromdiploidinterspecificcrosseswithcassava AT asiedurobert tetraploidstriploidsand2npollenfromdiploidinterspecificcrosseswithcassava |