Early Generation Evaluation in Antirrhinum majus for Prediction of Cutflower Postharvest Longevity
| Autor: | Dennis P. Stimart, William J. Martin |
|---|---|
| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Journal of the American Society for Horticultural Science. 128:876-880 |
| ISSN: | 2327-9788 0003-1062 |
| DOI: | 10.21273/jashs.128.6.0876 |
| Popis: | On-plant floret longevity and cutflower postharvest longevity (PHL) of Antirrhinum majus L., snapdragon, were evaluated using inbreds P1 (16 day PHL) and P2 (6 day PHL), F1 (P1 x P2), F2 (F1 self-pollinated), F2 x F2 (among and within PHL categories: long, 17 to 25 days; middle, 9 days; and short, 2 to 3 days), and F3 families (F2 self-pollinated). F2 on-plant floret longevity and PHL correlated to later generation PHL. Prediction of progeny PHL from F2 x F2 mat- ings appears feasible if genotypic value for PHL of F2 is known. Selection for PHL is best based on evaluation of multiple cutflowers per genotype. Significant additive and dominant genetic variance components contribute to PHL. Cutflowers are highly perishable and cutflower postharvest longevity (PHL) is critical to market value. Historical and current research uses chemical treatments to extend PHL by only a few days. Several of these compounds are carcinogens, long lasting in the environment, and toxic at low concentrations (Nell, 1992; Ohkawa et al., 1999). With chemicals available to industry be- ing limited in efficacy and in number, a need exists to explore alternative methods of extending PHL. Despite the importance of PHL in determining quality and consumer preference, information on inheritance and response to selection for PHL remains scarce. Variability for PHL has been observed in Antirrhinum majus L. (Stieve and Stimart, 1994), Begonia ×cheimantha Everett (Hvoslef-Eide et al., 1995), Cal- listephus chinensis L. (Patil and Rane, 1999), Eustoma sp. Raf. (Ohkawa and Sasaki, 1999), Leptospermum sp. (Bicknell, 1995), Limonium sp. (Burge et al., 1998), Lupinus havardii Wats (Mackay and Davis, 1998), Paeonia sp. (Heuser and Evensen, 1986), and members of the Proteaceae (Joyce and Beal, 1999). Genetic vari- ance components, of greater immediate utility for improving PHL, have been reported in: A. majus (Schroeder and Stimart, 2001), Dendrobium cultivars (Bobisud and Kamemoto, 1982), Gerbera |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|