以邳州市银杏种质资源圃20个银杏无性系为材料,利用耐热性、种核产量、单核重以及光合生产力等指标对20个银杏无性系进行综合评价.结果表明:半致死温度能够有效评价不同银杏无性系的耐热性差异,耐热性顺序为:9#＞3#＞54#＞27#＞40#＞39#＞11#＞15#＞5#＞31#＞44#＞2#＞34#＞36#＞42#＞50#＞ 28#＞33#＞35#＞55#;从种核产量来看,37#、36#、27#、57#、39#种核产量较高；从单核重来看,27#、57#、34#、31#和42#的单核重位居前列;从光合速率来看,54#、40#、27#、31#、39#、33#属高光合速率的无性系.通过综合评价,27#、31#、57#在南方引种中具有较大潜力,尤其27#是南移引种材料的最佳选择.%By taking 20 clones of Ginkgo biloba L. growing in Ginkgo Germplasm Nursery in Pizhou city as tested materials, the comprehensive evaluation of the clones were assessed based on heat tolerance, nut yield, single nut weight, and photosynthetic productivity. The results were as follows: the obtained lethal temperature could effectively evaluate the relative differences of Ginkgo heat resistance, the order of heat resistance of 20 clones was 9#> 37# >54# >27#> 40# >39# >ll# >15# >57# >3l#>44#> 20#> 34#>36#>42#> 50#> 28#>33#>35#>55#; viewed from nut yield, the clones of 37#, 36#, 27#, 57#, 39# were more than others; viewed from single nut weight, the clones of 27#, 57#, 34#, 31#, 42# were ranked in the forefront; viewed from the photosynthetic production capacity, the clones of 54#, 40#, 27#, 31#, 39#, 33# possessed higher photosynthetic rate. By comprehensive evaluation, the clones of 27#, 31#, and 57# for nut-production clones had a great potential to grow in south China, among them, 27* was the best choice for introduction towards south China.
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