VARIATION IN NUT, KERNEL, AND SHELL CHARACTERISTICS OF JUGLANS NIGRA L.

G. Rink, Edward F. Loewenstein, H.E. Garrett, Joan K. Haines, James E. Jones
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.

Rink, G., Loewenstein, Edward F., Garrett, H.E., Haines, Joan K. and Jones, James E. (1997). VARIATION IN NUT, KERNEL, AND SHELL CHARACTERISTICS OF JUGLANS NIGRA L.. Acta Hortic. 442, 197-204
DOI: 10.17660/ActaHortic.1997.442.28
https://doi.org/10.17660/ActaHortic.1997.442.28
Eastern black walnut, selection, Pearson's correlation

Acta Horticulturae