Annual fluctuations of fruit yield and wax content of Rhus succedanea L. clones
2005
Hiraoka, Y. (National Forest Tree Breeding Center, Nishigoshi, Kumamoto (Japan). Kyushu Regional Breeding Office) | Ohira, M. | Yamanobe, T. | Kuramoto, N. | Okamura, M. | Fujisawa, Y.
Annual yields and wax contents of fruits of fifty clones of Rhus succedanea L. were investigated in three study sites from 1998 to 2003. Fruit yields at these sites synchronously fluctuated through the consultation period. There were large yields of fruit in 2000, 2001 and 2003 and was a lean yield in 2002. Annual yields correlate with precipitations of previous August and November. However wax contents also fluctuated, which coefficient of variance were smaller than that of yields, there were not relationship with fruit yield. Almost all rank correlation coefficients between 2-year yields and wax contents of clones were plus, though magnitude and significance of coefficients varied with years or sites. These suggest that orders of clone superiority about yield and wax content fluctuate among surveyed years and sites. On the basis of these results and previous study, the method for evaluation of plus clones of R. succedanea was considered.
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