Bio-control technology: the source and genetic variation mechanism of two invasive biological aircraft.

Through in-depth study, researchers at xishuangbanna Tropical Botanical Garden of the Chinese Academy of Sciences have successfully revealed the source and genetic variation of two invasive biological aircraft.
the findings have been published in the international journal Biological Invasion.
aircraft grass, native to the Americas, has now invaded the tropical and subtropical regions of the islands of Africa, Asia, the Western Pacific and Oceania, and has been placed on the list of the world's top 100 most harmful invasive organisms due to rapid growth and reproduction, which has caused great damage to local agroforestry and animal husbandry industries.
, there are two types of aircraft grasss with significant morphological differences in the invading region, one in West Africa, Central Africa, Asia, the Western Pacific and Oceania islands, known as the Asian West African biotype, and the other in South Africa, known as the South African biotype.
In order to find out their genetic diversity and origin, researchers from the Botanical Garden Community Construction and Species Coexistence Group conducted a genealogical geography and residential genetics study of aircraft grasses distributed worldwide.
with the help of experts and field workers from the Department of Zoology and Entomology at the University of Rhodes in South Africa, the researchers obtained 92 individuals from 16 clusters in Central and South America, and 48 individuals from 15 colonies in Asia, the Western Pacific, Oceania, West Africa and South Africa.
used one nuclear gene fragment, two chloroplast DNA fragments and six microsatellite sites to analyze the source and genetic diversity of the two biological aircraft grasses, combined with the relevant sequences of origin in the gene pool and the invading Asian aircraft grasses.
studies show that the genetic diversity of the origin aircraft grass is high, but the genetic diversity of the two invasive aircraft are very low, and the genotypes are not the same.
a combination of hapnaandic and microsatellite DNA analysis, the researchers determined that the source of the African West African biological aircraft grass is most likely the island of Trinidad and Tobago in the West Indies, and the source of the South African biological aircraft grass is most likely Cuba and Jamaica.
the results of the study, the strong invasiveness and environmental adaptability are the main reasons for the successful spread of these two aircraft grass.
the results of this study provide a scientific basis for the introduction of natural enemies of aircraft grass biological control in invasive areas, as well as a genetic basis for the study of aircraft grass invasion mechanism.
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