New Zealand Journal of Crop and Horticultural Science abstracts
Production of triploid Zantedeschia hybrids using embryo rescue
JIA-LONG YAO
DANIEL COHEN
The Horticulture and Food Research
Institute of New Zealand
Private Bag 92169
Auckland, New Zealand
Abstract Triploid hybrid plants were produced from crosses
between diploid and tetraploid plants of the winter-dormant section in the
genus Zantedeschia. In five different crosses, the endosperm became
degenerate and embryo development was restricted to the globular stage because
of post-fertilisation incompatibility. Using an embryo rescue technique, hybrid
plants were produced from two crosses. These plants were confirmed to be
triploids by counting chromosomes in root-tip cells. The triploid plants
flowered in a greenhouse and produced no pollen. As hybridisations among
diploid plants in the winter-dormant section are generally compatible, severe
incompatibility in the diploid-tetraploid crosses may be the result of the
imbalance of chromosome numbers.
Keywords calla lily; triploid plants; endosperm balance
number; post-fertilisation incompatibility
New Zealand Journal of Crop and Horticultural Science, 1996, Vol. 24:
297-301
0114-0671/96/2404-0297 $2.50/0 (c) The Royal Society of New Zealand
1996
PDF file of entire paper: medium quality (1169K); (scanned from paper original: notes about this process)
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