Table 1.

Materials used in this study.

No.	Taxon	Rank	Section	Place of collection
1	Juglans regia ‘Zha 343′	Cultivar	Juglans	*
2	Juglans sigillata	Species	Juglans	**
3	Juglans sigillata ‘Lushui 1Hao’	Cultivar	Juglans	**
4	Juglans cathayensis	Variety	Cardiocaryon	**
5	Juglans mandshurica	Species	Cardiocaryon	**
6	Juglans hindsii	Species	Rhysocaryon	*
7	Juglans major	Species	Rhysocaryon	*
8	Juglans microcarpa	Species	Rhysocaryon	*
9	Juglans nigra	Species	Rhysocaryon	*
10	Pterocarya stenoptera	Species		***
11	Cyclocarya paliurus	Species		***

^*Resources Nursery, Forsetry Bureau of Luoning County, Henan, China.

^**Forestry Academy of Yunnan Province, Kunming City, Yunnan, China

^***Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, China.