Early-inbreeding depression inVaccinium myrtillus andV. vitis-idaea |
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| Authors: | P Guillaume A -L Jacquemart |
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| Institution: | (1) Laboratoire de Cytogénétique, Unité de Botanique, Université Catholique de Louvain, Place Croix-du-Sud 5 Boîte 13, B-1348 Louvain-la-Neuve, Belgium;(2) Unité d'Ecologie et de Biogéographie, Université Catholique de Louvain, Louvain-la-Neuve |
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| Abstract: | Summary Fertility parameters were estimated inVaccinium myrtillus andV. vitis-idaea after self- and cross-pollinations performed in growth chamber. We showed a drastic decrease in fertility after self-pollination as compared to cross-pollination. Number of plump seeds per berry was compared with previous field data. In both species, growth room conditions improved plump seed number after cross-pollination but not after self-pollination. In addition, in order to enhance resources supply to young developing fruits, cytokinin application was tested inV. myrtillus but no effect was detected. We hypothesize that the partial self-sterility is due to inbreeding depression based on the expression of recessive lethals. |
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| Keywords: | Vaccinium myrtillus Vaccinium vitis-idaea Inbreeding depression Cytokinin application |
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