ISHS Acta Horticulturae 442: III International Walnut Congress
VARIATION IN NUT, KERNEL, AND SHELL CHARACTERISTICS OF JUGLANS NIGRA L. |
| Authors: | G. Rink, Edward F. Loewenstein, H.E. Garrett, Joan K. Haines, James E. Jones |
| Keywords: | Eastern black walnut, selection, Pearson's correlation |
| Abstract:
Measures of nut length, diameter, and weight, as well as of kernel and shell weights, from 156 Juglans nigra L. trees in a southwest Missouri (USA) plantation were analyzed using correlation and regression techniques. Correlations between one measure of nut diameter and nut weight (r=0.868) and between nut weight and kernel weight (r=0.705) were statistically significant (p<0.0001), suggesting that nut diameter could be used as a selection criterion for heavier nuts with larger nutmeats. The correlation between nut weight and shell weight (r=0.962) was also very high. Scatter diagrams of nut variables evaluated are presented in a unique matrix format. From individual tree nut production records over an 8-year period, it was observed that a few trees begin nut production at an early age (7 years) and bear nuts regularly. The potential for selecting of black walnut trees for gain in nut production is discussed. | |
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