The Kunming Institute of Botany and a number of units took loquat as an example to reveal that the tropical and subtropical transition areas are hot spots for paleohybridization

The study collected a total of 47 populations of 23 species of loquat in China and Southeast Asia (Figure 2 ), a total of 817 individuals (including 12 species and 19 populations of the Yunnan-Guizhou Plateau ), and selected 3 chloroplast fragments and 5 nuclear gene fragments Group sequencing was carried out.
At the same time, 33 representative individuals of the loquat genus were selected for shallow genome sequencing, and their chloroplast genomes and 197 single-copy nuclear genes were extracted .
Based on a series of population genetic and phylogenetic methods, the evolution history of loquat was carried out .
The results showed that: ( 1 ) Nucleocytoplasmic
conflict and chloroplast capture caused by hybridization introgression events were detected in a number of loquat species located in the tropical and subtropical transition zone of the Yunnan-Guizhou Plateau ; ( 2 ) Loquat originated in the Eocene in tropical Asia, Subsequently, the strengthening of the East Asian monsoon climate and global cooling in the Miocene changed the position of the tropical and subtropical transition zone at that time , resulting in the secondary contact of a large number of species and the occurrence of interspecific hybridization and gene infiltration
.

The above findings to " the When Tropical and subtropical congeners Met: Multiple Ancient Hybridization Events the WITHIN Eriobotryain at The Yunnan-Guizhou Plateau, A Tropical-subtropical Transition Area in China " published in prestigious journals in the field of molecular ecology in the title, Chinese Academy of Sciences 1 district journal Molecular Ecology on
.

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Figure 1 Loquat species: a.

Figure 2  Sample collection diagram of loquat species
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