Abstract
The diversity of globally distributed populations of purple nutsedge was assessed using molecular marker data and morphological traits. Cluster analysis of binary random amplified polymorphic DNA (RAPD) data and morphological traits indicated that the global population of purple nutsedge consisted of two clades. Cluster analysis of the RAPD data supported separation of the purple nutsedge accessions evaluated into two distinct clades of 11 and 33 accessions. Except for accessions identified as California* and Arizona, all USA accessions were clustered with accessions from Taiwan, Western Samoa, New Zealand, Malaysia, Japan, El Salvador, Columbia, Australia, Thailand and West Indies. A second cluster included accessions from Sudan, Greece, Iran, California*, Arizona, Brazil, Argentina, Mauritius, Philippines, Indonesia and Tanzania. The accessions from Sudan, Greece, Iran, Mauritius, and Tanzania were distributed along a similar longitudinal axis. Cluster analysis based on morphological traits though not identical to that based on RAPD data also supported separation into two clades and perhaps a third. The lack of genetic diversity among accessions supported the hypothesis that spread and propagation into new environments were largely by tubers which preserved genetic identity. The lack of diversity particularly among New World and USA accessions may also reflect a relatively recent introduction of the species into the Americas and a low level of outcrossing.
Highlights
Purple nutsedge (Cyperus rotundus L.) is an important agricultural weed in the tropical and warm temperate regions of the world [1]
Cluster analysis based on morphological traits though not identical to that based on random amplified polymorphic DNA (RAPD) data supported separation into two clades and perhaps a third
Multiple PCR amplification products were obtained from only 13 (Table 2) of 240 primers initially screened with 5 accessions. These results indicated that primer selection was essential for comparative PCR analysis of purple nutsedge accessions as was presented by Okoli et al [14]
Summary
Purple nutsedge (Cyperus rotundus L.) is an important agricultural weed in the tropical and warm temperate regions of the world [1]. It has been found on six continents, in 92 countries and is a problematic weed in 52 crops [1] [2]. Purple nutsedge was a beneficial species valued for its medicinal uses, aromatic qualities, and as a source of carbohydrates and fiber [3]. The utility of purple nutsedge may account for its spread throughout the eastern Mediterranean region and Eurasia. The country of origin of purple nutsedge is uncertain [5] [6]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
