Admixture with cultivated sunflower likely facilitated establishment and spread of wild sunflower (Helianthus annuus) in Argentina

A better understanding of the genetic and ecological factors underlying successful invasions is critical to mitigate the negative impacts of invasive species. Here, we study the invasion history of Helianthus annuus populations from Argentina, with particular emphasis on the role of post-introduction admixture with cultivated sunflower (also H. annuus) and climate adaptation driven by large haploblocks. We conducted genotyping-by-sequencing of samples of wild populations as well as Argentinian cultivars and compared them with wild (including related annual Helianthus species) and cultivated samples from the native range. We also characterized samples for 11 known haploblocks associated with environmental variation in native populations to test whether haploblocks contributed to invasion success. Population genomics analyses supported two independent geographic sources for Argentinian populations, the central United States and Texas, but no significant contribution of related annual Heli..., , , # Admixture with cultivated sunflower likely facilitated establishment and spread of wild sunflower (Helianthus annuus) in Argentina

[https://doi.org/10.5061/dryad.v9s4mw75c](https://doi.org/10.5061/dryad.v9s4mw75c)

## Description of the data and file structure

vcf files used in the manuscript

### Files and variables

#### File: vcf.plus.perennials.vcf.gz

**Description:** vcf file used in the analyses including outgroup samples (ABBA-BABA and TreeMix). SNPs were filtered for low LD (r2< 0.2)

#### File: vcf1.lowLD.vcf.gz

**Description:** vcf file with all the samples used in this study, including Argentinian samples, the cultivated SAM populations as well related annual Helianthus species. SNPs were filtered for low LD (r2< 0.2).

#### File: vcf1.vcf.gz

**Description:** vcf file with all the samples used in this study, including Argentinian samples, the cultivated SAM populations as well related annual Helianthus species. No LD filtering.

#### File: vcf3.lowLD.vcf.gz

**De...

深入理解支撑成功生物入侵的遗传与生态因子，对于减轻入侵物种带来的负面影响至关重要。本研究聚焦阿根廷向日葵（Helianthus annuus）野生种群的入侵历史，重点探讨引入后与栽培向日葵（同为普通向日葵，即Helianthus annuus）的基因渐渗，以及由大型单倍块（haploblock）驱动的气候适应性机制。我们对野生种群及阿根廷栽培种样本开展了测序分型（genotyping-by-sequencing），并将其与原生分布区的野生样本（包含相关一年生向日葵属物种）及栽培样本进行比对。此外，我们针对原生种群中与环境变异相关的11个已知单倍块进行分型，以验证单倍块是否助力入侵成功。群体基因组学分析结果显示，阿根廷种群存在两个独立的地理来源：美国中部与德克萨斯州，但未发现相关一年生向日葵物种的显著遗传贡献。与栽培向日葵的基因渐渗或推动了阿根廷野生向日葵的定植与扩散。

https://doi.org/10.5061/dryad.v9s4mw75c

## 数据与文件结构说明
本研究手稿中使用的VCF格式文件
### 文件与变量
#### 文件：vcf.plus.perennials.vcf.gz
**说明**：本研究分析（包含ABBA-BABA与TreeMix分析）中使用的VCF文件，涵盖外类群样本。单核苷酸多态性（Single Nucleotide Polymorphism，SNP）位点已完成低连锁不平衡（Linkage Disequilibrium，LD）过滤（r² < 0.2）。
#### 文件：vcf1.lowLD.vcf.gz
**说明**：本研究所有样本使用的VCF文件，包含阿根廷样本、栽培SAM种群以及相关一年生向日葵属物种。SNP位点已完成低LD过滤（r² < 0.2）。
#### 文件：vcf1.vcf.gz
**说明**：本研究所有样本使用的VCF文件，包含阿根廷样本、栽培SAM种群以及相关一年生向日葵属物种，未进行LD过滤。
#### 文件：vcf3.lowLD.vcf.gz
**说明**：……