Genetic structure of the invasive Chromolaena odorata in China

Abstract

Summary Chromolaena odorata is one of the world's worst tropical weeds, and it can be found in Guangdong, Guangxi, Hainan and Yunnan provinces in China. Genetic variation of 27 C. odorata populations sampled from across its invasive range in China was investigated using inter‐simple sequence repeats (ISSR) analysis. All populations exhibited low levels of genetic variation. On average, 2.35% of the ISSR loci were polymorphic, total genetic diversity (HT) was 0.0406 and Shannon's information index (Hsp) was 0.0623. High genetic identities (I) between populations (0.9687 ± 0.01204) indicated low genetic differentiation. A frequent founder effect was interpreted as the main cause of the genetic structure observed in C. odorata.

Genetic diversity in the invasive Rubus phoenicolasius as compared to the native Rubus argutus using inter-simple sequence repeat (ISSR) markers

“…In addition, many invasive species (including R. phoenicolasius) are clonal and/or self-compatible (Liu et al 2006), which could also lead to a decrease in variation (Amsellem et al 2000). The lack of genetic diversity in clonal invasives was demonstrated using ISSRs and there is the possibility that characteristics other than genetic diversity facilitate the invasive success (Ye et al 2004;Poulin et al 2005;Sun et al 2005;Gutierrez-Ozunaa et al 2009). Most likely R. phoenicolasius has had a history of few introductions in the study sites.…”

Development of expressed sequence tag-simple sequence repeat markers for genetic characterization and population structure analysis of Praxelis clematidea (Asteraceae)

“…King & H. Rob. (H = 0.0406, I = 0.0623, and P = 12.31%;Ye et al, 2004), P. clematidea has relatively higher genetic diversity at the species level. This result is consistent with data obtained using ISSR markers (H = 0.2791, I = 0.4226, and P = 100.00%; Wang et al, 2015) and reflects a greater potential to adapt to an invaded environment.…”

Chromolaena Odorata in Different Ecosystems: Weed or Fallow Plant?

“…The genetically homogeneous population structure in weeds makes it easier to match a biological control agent to host genotypes and makes this species particularly vulnerable to biological enemies (Van Driesche and Bellows, 1996; Muniappan and Marutani, 1991) argued that mechanical control is labor intensive and not long lasting; cultural control is long lasting, however either mechanical or chemical control program has to be carried out initially to implement the cultural control; while chemical is effective, but expensive, and poses some environmental problems. Ye et al (2004) studied a genetic structure of the invasive C. odorata in China. The authors argued that because the genetic variation of C. odorata is very low, if a suitable biological enemy was identified effective for control, the various populations of C. odorata in China could have a uniform response to this biological control.…”