Sugary1 inbreds to improve sugary enhancer1 hybrids of sweet corn for adaptation to cold areas with short growing seasons
Sweet corn hybrids (Zea mays L.) homozygous for sugary1 (su1) and sugary enhancer1 (se1) mutants (su1se1 hybrids) have a high eating quality, but reduced emergence and poor early vigor, especially under European Atlantic conditions, characterized by cold and humid springs, and a short growing season...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2004 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/32955 |
| Acceso en línea: | http://hdl.handle.net/10261/32955 |
| Access Level: | acceso abierto |
| Palabra clave: | Sweet corn adaptation Donors of alleles Sugary enhancer Zea mays L. |
| Sumario: | Sweet corn hybrids (Zea mays L.) homozygous for sugary1 (su1) and sugary enhancer1 (se1) mutants (su1se1 hybrids) have a high eating quality, but reduced emergence and poor early vigor, especially under European Atlantic conditions, characterized by cold and humid springs, and a short growing season. Elite sweet corn inbreds homozygous for the sugary1 mutant and without the sugary enhancer1 modifier (su1 hybrids) have good emergence and early vigor, so they seem adequate to improve the agronomic value of su1se1 hybrids. Our objective was to identify su1 inbreds as potential donors for improving adaptation of some su1se1 hybrids, that we had found previously to have an outstanding eating quality, to Atlantic conditions. Eight sul inbreds, that we had found in previous works to be well adapted to Atlantic conditions, were chosen. Six different estimators of favorable alleles (μG', PTC, UBND, NI, PNGg, and PNGceg) and GCA were calculated. μG', PTC, NI, and UB-ND give similar estimations for traits related with adaptation when donors are su1 inbreds and receivers are su1se1 hybrids. PNGg and PNGceg give different estimations and, when one of the donors performs very poorly, its estimations are erroneous. According to the estimators, the emergence and early vigor of (lie 12 sulsel hybrids used in this study can he improved with some of the su1 inbreds, and so sweet corn hybrids of high quality adapted to areas with cold, humid springs, and a short growing season can lie developed. Although the inbreds obtained in situ seem to be the more appropriate material where we can search for adaptation alleles, it is necessary to calculate estimators of favorable alleles to confirm the expectations. |
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