Variation of gynogenesis ability in onion (Allium cepa L.) |
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| Authors: | E Geoffriau R Kahane M Rancillac |
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| Institution: | (1) AGROCINQ, 17 av. D. Daurat, BP112, F31703 Blagnac Cédex, France;(2) INRA, Station de Génétique et d'Amélioration des Plantes, BV1540, F21034 Dijon Cédex, France;(3) COOPD'OR, RN 5, F21130 Villers-les-Pots, France |
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| Abstract: | Onion varieties from Northern-Europe, Eastern-Europe, Southern-Europe and the U.S. including populations, inbreds, synthetics
and clones were tested for their gynogenesis ability for three years: 1993-1995. Embryos were induced in Petri dishes using
in vitro culture of flower buds. Embryo rate, regeneration rate, survival rate, embryo quality and ploidy level of regenerants
are described. Important genotype and variety effects are pointed out; embryo production and plant regeneration ranged from
0 to 17% and from 0 to 11% of inoculated flowers, respectively. Highest results were obtained with inbreds and synthetics
for embryo production as well as for plant regeneration. Populations expressed various responses which were generally low.
Geographic origin and year effects were covered by the effects of genetic structure of varieties and specific genotype of
donor plant. Among regenerants, 80% were haploid and 13% were spontaneous diploid. No relation has been found between general
quality and ploidy level of regenerants. The choice of plant material for successful gynogenesis in onion is discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | Allium cepa genetic diversity gynogenesis haploid onion |
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