Jiao‐Jie Li’s research while affiliated with Shaanxi Normal University and other places

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Publications (2)


Divergence in the Aquilegia ecalcarata complex is correlated with geography and climate oscillations: Evidence from plastid genome data
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August 2021

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186 Reads

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16 Citations

Molecular Ecology

Cheng Xue

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Jiao‐Jie Li

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Quaternary climate oscillations and geographical heterogeneity play important roles in determining species and genetic diversity distribution patterns, but how these factors affect the migration and differentiation of East Asian plants species at the population level remains poorly understood. The Aquilegia ecalcarata complex, a group that originated in the Late Tertiary and is widely distributed throughout East Asia, displays high genetic variation that is suitable for studying elaborate phylogeographic patterns and demographic history related to the impact of Quaternary climate and geography. We used plastid genome data from 322 individuals in 60 populations of the A. ecalcarata complex to thoroughly explore the impact of Quaternary climate oscillations and geography on the phylogeographic patterns and demographic history of the A. ecalcarata complex through a series of phylogenetic, divergence time estimation, and demographic history analyses. The dry, cold climate and frequent climate oscillations that occurred during the early Pleistocene and the Mid‐Pleistocene transition led to the differentiation of the A. ecalcarata complex, which was isolated in various areas. Geographically, the A. ecalcarata complex can be divided into Eastern and Western Clades and five subclades, which conform to the divergence of the East Asian flora. Our results clearly show the impact of Quaternary climate and geography on evolutionary history at the population level. These findings promote the understanding of the relationship between plant genetic differentiation and climate and geographical factors of East Asia at the population level.

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Fig. 2. population genomic analysis. (a) ADMIXTURE estimates of individual ancestries. The x-axis shows populations, and the y-axis quantifies the proportion of inferred ancestral genetic components. (b) Geographic distribution of the sampling locations. The color represent ancestral genetic components (according to the substructure at K=6). (c) PCA of SNP data for A. ecalcarata and its three related species. (d) PCA of SNP data for A. ecalcarata and its three related species except intermediate individuals of SC16 and all individuals of SC17.
Fig. 3. (a) The putative species tree. The putative introgression from eca-west group into eca-east group is indicated by an arrow. (b) The four possible
Fig. 4. The detection of the excess of shared variation. (a), (b), (c) and (d) Analysis of ABBA-BABA. Number of sites supporting different trees is indicated both as a percentage and as actual number. A non-zero D statistic reflects an asymmetric pattern of allele sharing, implying gene flow. Z value that can be used to determine the significance of the test. An absolute value of the Z score above 3 is often used as a critical value. All tests use A. yabeana as the outgroup.
Mean weightings for the four possible topologies across the seven chromosomes
Loss of innovative traits underlies multiple origins of Aquilegia ecalcarata

July 2021

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176 Reads

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3 Citations

Journal of Systematics and Evolution

Traits are basic attributes of organisms that form the basis for speciation and diversity. The floral nectar spur is a classic example of a key innovative trait. Differences in nectar spur morphology can lead to pollinator specialization and thereby promote reproductive isolation between species. Despite its importance, the nectar spur has been lost in some members of the columbine genus (Aquilegia), resulting in a new spurless trait, and the evolutionary influence of this trait has become a topic of scientific interest. Aquilegia ecalcarata is an important representative columbine species that lacks spurs. Here, we resequenced the genomes of 324 individuals from A. ecalcarata and four related species. We found that A. ecalcarata was divided into three groups based on the phylogenetic relationships and population genetic structures. Topology weighting analysis revealed that A. ecalcarata has multiple origins, and Patterson's D statistic showed that the spurless trait may have one origin. Floral morphological analysis revealed significant differences between A. ecalcarata and its spurred sister groups, and the floral phenotypes of the three A. ecalcarata groups have identical or similar floral phenotypes. Our results confirmed that the spurless trait not only produced the phenotype of A. ecalcarata but also contributed to the emergence of the A. rockii phenotype. Moreover, the spurless trait promoted the divergence between A. ecalcarata and its close, spurred relatives. Our research shows that the loss of key innovative traits can play a very important part in speciation and species diversity. This article is protected by copyright. All rights reserved.

Citations (2)


... The territory from the Hengduan Mountains to the Qinghai-Tibet Plateau is dotted with numerous high mountains and deep valleys, which serve as natural barriers whose presence leads to distinct vegetation patches. These barriers impede gene flow, fostering fragmentation and isolation, resulting in a relatively high level of genetic differentiation [45,46]. The cross-clustering of a few individuals in the five clades is likely an indication of infrequent long-distance seed or bulblet dispersal by F. cirrhosa and its relatives ( Figure 5). ...

Reference:

Phylogeny, Genetic Diversity and Population Structure of Fritillaria cirrhosa and Its Relatives Based on Chloroplast Genome Data
Divergence in the Aquilegia ecalcarata complex is correlated with geography and climate oscillations: Evidence from plastid genome data

Molecular Ecology

... Within the genus Aquilegia, significant morphological variation is observed. For example, the Asian species A. ecalcarata is notable for being spurless and lacking nectaries ( Figure 4A, Geng et al., 2021), whereas A. jonesii, a North American species which is found at high altitudes, lacks the novel organ staminodes ( Figure 4B, Johns et al., 2024). Variations in petal spur length in Aquilegia species are particularly well-studied in North America species, where the spur lengths range from~5-150 mm (Figures 5A-K). ...

Loss of innovative traits underlies multiple origins of Aquilegia ecalcarata

Journal of Systematics and Evolution