To investigate the genetic diversity and population structure of native grass carp ( Ctenopharyngodon idella ) in the Xiangjiang River, 16 highly polymorphic microsatellite markers were selected from the grass carp genome for a population genetic analysis of 300 individuals collected from a single section (Xiangluzhou) of the river, representing six different year‐classes (2016–2022). A total of 322 alleles were detected, with...