Chromosome Karyotype Analysis of 14 Quinoa Germplasms from Different Habitats
This study used a conventional compression method to compare the karyotype characteristics of 14 quinoa species and clustered their karyotype approximation numbers in order to clarify the chromosome number and karyotype characteristics of quinoa from different origins,as well as their kinship and evolutionary relationships.The results showed that the Xinli 6 possesses a chromosome number of 2n=54,whereas the remaining 13 quinoa species exhibit a chromosome number of 2n=36.The chromosome karyotypes,predominantly categorized as 1A,1B,1C,and 2B,demonstrated a general symmetry.The nuclear asymmetry coefficient ranges from 52.06％to 59.76％.The 14 quinoa species were divided into two primary groups by karyotypic dustering analysis;Quinoa 1605 formed a separate class by itself,while the other 13 species were clustered together.The varieties from the same region displaying similar affinities and evolutionary.Conversely,quinoa varieties from different origins exhibit greater genetic divergence due to geographical separation or varying levels of environmental influence during the evolutionary process.This study obtained karyotypic information on 14 different quinoa germplasms,enriching the database on quinoa chromosome karyotypes and cytogenetic studies.
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