摘要
杂交与多倍化是物种进化与多样化的主要途径。本研究以二倍体大果榆与四倍体白榆杂交获得的榆树异源三倍体后代及其亲本为材料,比较榆树异源三倍体在表型性状与亲本之间的差异,并对其光合特性进行分析。结果表明,榆树异源三倍体叶面积小于母本二倍体大果榆,与父本四倍体白榆不存在明显差异,而其综合叶片形态特征遗传特性更为偏向于母本;榆树异源三倍体气孔大小显著高于母本二倍体大果榆,与父本四倍体白榆无显著差异;叶片厚度榆树异源三倍体较父母本薄。叶绿素含量与叶绿素a/b比值与父本四倍体白榆无显著差异,但显著高于母本二倍体大果榆。叶片净光合速率显著高于母本二倍体大果榆,与父本四倍体白榆无显著差异。
Hybridization and polyploidization are the main ways of species evolution and diversity.In this study,the allotriploid progeny of elm and its parent obtained from the cross between Ulmus macrocarpa and tetraploid Ulmus pumila were used as materials to compare the differences between phenotypic traits and parents of the allotriploid elm,and analyse its photosynthetic properties.The results showed that the leaf area of allotriploid elm was smaller than that of diploid U.pumila,and there was no significant difference between allotriploid elm and tetraploid U.pumila,but the genetic characteristics of its comprehensive leaf morphological characteristics were more inclined to the female parent;The stomatal size of allotriploid of elm was significantly higher than that of diploid U.macrocarpa of female parent,but there was no significant difference between allotriploid and tetraploid U.pumila of male parent;The leaf thickness of elm allotriploid is thinner than that of its parent.Chlorophyll content and chlorophyll a/b ratio were not significantly different from those of the male parent tetraploid U.pumila,but were significantly higher than those of the female parent U.pumila.The net photosynthetic rate of leaves was significantly higher than that of the female parent U.macrocarpa,and there was no significant difference between it and the male parent tetraploid U.pumila.
作者
闫晓丽
王书柔
丁新宇
刘兴菊
梁海永
YAN Xiaoli;WANG Shurou;DING Xinyu;LIU Xingju;LIANG Haiyong(College of Forestry,Hebei Agricultural University,Hebei Baoding 071000;Key Laboratory of Germplasm Resources and Forest Conservation,Hebei Province,Hebei Baoding 071000)
出处
《林业科技》
2023年第4期1-5,共5页
Forestry Science & Technology
基金
榆属品种选育项目(1513007)。
关键词
榆树
异源三倍体
表型性状
elm
heterologous triploids
phenotypic traits
