Effect of selection for pollen grain size on various traits in common bean
Selection among microgametophytes usually exploits variation in pollen grain germination. Studies of variation in pollen grain size in common bean (Phaseolus vulgaris L.) suggested that selection for size might lead to changes in sporophytic traits. To determine whether microgametophytic selection b...
| Autores principales: | , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
1996
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/42789 |
| _version_ | 1855531988964868096 |
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| author | Montes Rojas, C White, Jeffrey W. |
| author_browse | Montes Rojas, C White, Jeffrey W. |
| author_facet | Montes Rojas, C White, Jeffrey W. |
| author_sort | Montes Rojas, C |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Selection among microgametophytes usually exploits variation in pollen grain germination. Studies of variation in pollen grain size in common bean (Phaseolus vulgaris L.) suggested that selection for size might lead to changes in sporophytic traits. To determine whether microgametophytic selection based on size would affect pollen grain size in subsequent generations or sporophytic traits that were correlated with pollen grain size, pollen grains from three crosses were separated into two size categories by sieving and then used to pollinate cv. Diacol Calima. Selection resulted in changes in pollen grain diameter for pollen from F1, F2 and F3 plants for all crosses. In vitro germination indicated no differences between vigor of large and small grains, but extraction and sieving reduced germinability. F1 seed from two of the crosses with size-selected pollen varied in weight according to pollen grain size, but in subsequent generations, the effect disappeared. Both size categories of selected pollen resulted in F2 progeny with reduced numbers of seeds per pod as compared to controls, suggesting that the size selection process may have resulted in indirect selection for traits reducing seed set. The overall results suggested that genes determining pollen grain size in bean have little or no effect on sporophytic traits such as seed size and seed yield. |
| format | Journal Article |
| id | CGSpace42789 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1996 |
| publishDateRange | 1996 |
| publishDateSort | 1996 |
| record_format | dspace |
| spelling | CGSpace427892021-10-09T05:57:13Z Effect of selection for pollen grain size on various traits in common bean Montes Rojas, C White, Jeffrey W. phaseolus vulgaris pollen diameter germination polen diámetro germinación Selection among microgametophytes usually exploits variation in pollen grain germination. Studies of variation in pollen grain size in common bean (Phaseolus vulgaris L.) suggested that selection for size might lead to changes in sporophytic traits. To determine whether microgametophytic selection based on size would affect pollen grain size in subsequent generations or sporophytic traits that were correlated with pollen grain size, pollen grains from three crosses were separated into two size categories by sieving and then used to pollinate cv. Diacol Calima. Selection resulted in changes in pollen grain diameter for pollen from F1, F2 and F3 plants for all crosses. In vitro germination indicated no differences between vigor of large and small grains, but extraction and sieving reduced germinability. F1 seed from two of the crosses with size-selected pollen varied in weight according to pollen grain size, but in subsequent generations, the effect disappeared. Both size categories of selected pollen resulted in F2 progeny with reduced numbers of seeds per pod as compared to controls, suggesting that the size selection process may have resulted in indirect selection for traits reducing seed set. The overall results suggested that genes determining pollen grain size in bean have little or no effect on sporophytic traits such as seed size and seed yield. 1996 2014-09-24T07:58:34Z 2014-09-24T07:58:34Z Journal Article https://hdl.handle.net/10568/42789 en Limited Access |
| spellingShingle | phaseolus vulgaris pollen diameter germination polen diámetro germinación Montes Rojas, C White, Jeffrey W. Effect of selection for pollen grain size on various traits in common bean |
| title | Effect of selection for pollen grain size on various traits in common bean |
| title_full | Effect of selection for pollen grain size on various traits in common bean |
| title_fullStr | Effect of selection for pollen grain size on various traits in common bean |
| title_full_unstemmed | Effect of selection for pollen grain size on various traits in common bean |
| title_short | Effect of selection for pollen grain size on various traits in common bean |
| title_sort | effect of selection for pollen grain size on various traits in common bean |
| topic | phaseolus vulgaris pollen diameter germination polen diámetro germinación |
| url | https://hdl.handle.net/10568/42789 |
| work_keys_str_mv | AT montesrojasc effectofselectionforpollengrainsizeonvarioustraitsincommonbean AT whitejeffreyw effectofselectionforpollengrainsizeonvarioustraitsincommonbean |