对美国33个原产地刺槐种源和我国5个次生刺槐种源的抗寒性进行了分析研究。结果显示：在38个刺槐种源中，抗寒性最好的种源为 ST James 种源，其次是 Independence、Elberfeld 种源。在183个刺槐家系中，抗寒性最好的家系为 ST James 种源中的113号家系，ST James 种源中的116号、Elberfeld 种源中的103号家系次之。原产地刺槐抗寒性具有地理变异规律，总体呈经向渐变模式，抗寒性随着经度的增大而增强。%The cold resistance of 33 Robinia pseudoacacia origin provenances and 5 secondary provenances were studied in this article.The results showed that in the 38 Robinia pseudoacacia provenances,ST James prove-nance had the strongest cold resistance,followed by Independence provenance and Elberfeld provenance.Also in 183 Robinia pseudoacacia genealogies,No.113 of ST James provenance had the strongest cold resistance,followed by No.116 of ST James provenance and No.103 of Elberfeld provenance.In all,the geographic variation regular pattern of origin Robinia pseudoacacia’s cold resistance showed meridional gradient mode,which enhancing with the increase of longitude.
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