ISHS Acta Horticulturae 556: V International Congress on Hazelnut
DISTRIBUTION OF QUANTITATIVE TRAITS IN HAZELNUT PROGENIES |
| Authors: | Q. Yao, S.A. Mehlenbacher |
| Keywords: | Corylus avellana, filbert, transgressive segregation |
| Abstract:
The distribution of 17 quantitative traits was studied in 35 hazelnut (Corylus avellana L.) progenies. The results for 10 traits in 20 progenies are presented as histograms. Continuous distributions were observed for 15 of the 17 traits. Most approximated normal distributions, except number of nuts per cluster, which was skewed toward lower values. Progeny means were very similar to midparent values, although seedlings tended to have fewer nuts per cluster, poorer blanching ability, more kernel fiber, and shorter husks than the average of their parents. In order to obtain seedlings that blanch very well, both parents of the cross should blanch well. Transgressive segregation was common except when parents had very different values. Bimodal distributions for time of catkin elongation and time of stigma exsertion are attributed to lack of development during periods of low temperature. | |
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