In overlapping distribution areas of Sorbus pohuashanensis and S.discolor in North China(Mount Tuoliang,Mount Xiling and Mount Baihua),Sorbus indi-viduals were found with pink fruit,which have never been recorded for ...In overlapping distribution areas of Sorbus pohuashanensis and S.discolor in North China(Mount Tuoliang,Mount Xiling and Mount Baihua),Sorbus indi-viduals were found with pink fruit,which have never been recorded for the flora of China.Fourteen morphological characters combined with four chloroplast DNA markers and internal transcribed spacer(ITS)were used to analyze the origin of the Sorbus individuals with pink fruits and their relationship to S.pohuashanensis and S.discolor.PCA,SDA and one-way(taxon)ANOVA of morphological characters provided convincing evidence of the hybrid ori-gin of Sorbus individuals with pink fruits based on a novel morphological character and many intermediate characters.Haplotype analysis based on four cpDNA markers showed that either S.pohuashanensis or S.discolor were maternal parents of Sorbus individuals with pink fruits.Incongru-ence of the position of Sorbus individuals with pink fruits between cpDNA and ITS in cluster trees supported by DNA sequence comparative analysis,implying former hybridiza-tion events between S.pohuashanensis and S.discolor.Mul-tiple hybridization events between S.pohuashanensis and S.discolor might have contributed to the generation of Sorbus individuals with pink fruits.This study has provided insights into hybridization between species of the same genus in sympatric areas,which is of great significance for the study of interspecific hybridization.展开更多
为探讨不同埋干深度对嫁接楸树根系生长特性的影响,选用无性系楸树品种中的中豫楸1号作为试验研究对象,共设置8,16,24,32,40 cm 5个埋干深度小组,对各个埋干深度小组楸树苗的苗高、直径、根系数量、根系长度、根系生物量数据进行测定。...为探讨不同埋干深度对嫁接楸树根系生长特性的影响,选用无性系楸树品种中的中豫楸1号作为试验研究对象,共设置8,16,24,32,40 cm 5个埋干深度小组,对各个埋干深度小组楸树苗的苗高、直径、根系数量、根系长度、根系生物量数据进行测定。结果发现,不同埋干深度处理小组间的粗根、中根和细根的数量和长度之间差异不显著(P<0.05),但是随着埋干深度的加深,楸树苗粗根的生物量呈递减趋势,以埋干深度为24 cm组的生物量最高;不同埋干处理小组的粗根、中根、细根的生物量主要集中在0~40 cm的嫁接根下根桩范围;随着埋干深度的不断加深,深层土壤中的生物量则越少。展开更多
基金This study was supported by the National Natural Science Foundation of China,Grant/Award Number:32071779.
文摘In overlapping distribution areas of Sorbus pohuashanensis and S.discolor in North China(Mount Tuoliang,Mount Xiling and Mount Baihua),Sorbus indi-viduals were found with pink fruit,which have never been recorded for the flora of China.Fourteen morphological characters combined with four chloroplast DNA markers and internal transcribed spacer(ITS)were used to analyze the origin of the Sorbus individuals with pink fruits and their relationship to S.pohuashanensis and S.discolor.PCA,SDA and one-way(taxon)ANOVA of morphological characters provided convincing evidence of the hybrid ori-gin of Sorbus individuals with pink fruits based on a novel morphological character and many intermediate characters.Haplotype analysis based on four cpDNA markers showed that either S.pohuashanensis or S.discolor were maternal parents of Sorbus individuals with pink fruits.Incongru-ence of the position of Sorbus individuals with pink fruits between cpDNA and ITS in cluster trees supported by DNA sequence comparative analysis,implying former hybridiza-tion events between S.pohuashanensis and S.discolor.Mul-tiple hybridization events between S.pohuashanensis and S.discolor might have contributed to the generation of Sorbus individuals with pink fruits.This study has provided insights into hybridization between species of the same genus in sympatric areas,which is of great significance for the study of interspecific hybridization.
文摘为探讨不同埋干深度对嫁接楸树根系生长特性的影响,选用无性系楸树品种中的中豫楸1号作为试验研究对象,共设置8,16,24,32,40 cm 5个埋干深度小组,对各个埋干深度小组楸树苗的苗高、直径、根系数量、根系长度、根系生物量数据进行测定。结果发现,不同埋干深度处理小组间的粗根、中根和细根的数量和长度之间差异不显著(P<0.05),但是随着埋干深度的加深,楸树苗粗根的生物量呈递减趋势,以埋干深度为24 cm组的生物量最高;不同埋干处理小组的粗根、中根、细根的生物量主要集中在0~40 cm的嫁接根下根桩范围;随着埋干深度的不断加深,深层土壤中的生物量则越少。
