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Article History

Received: 11 November 2022

Accepted: 26 July 2023

First Online: 18 August 2023

Declarations

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: This species was not included in the list of rare and endangered species in China. It was necessary to collect seeds for scientific research to solve the classification. Under the entrustment of China Resources Sanjiu Medical & Pharmaceutical Co., Ltd, diploid seeds of <i>I. indigotica</i> (1 ~ 26) and tetraploid seeds of <i>I. indigotica</i> (27) were collected in various provinces of China. <i>I. tinctoria</i> seeds (28) were collected in the Xinjiang Uygur Autonomous Region of China. The seeds of <i>I. indigotica</i> (1 ~ 27) were identified by Dr. Qiaosheng Guo of Nanjing Agricultural University. The seeds of <i>I. tinctoria</i> (28) were identified by the researcher BaharGuli Huangerhan of the Food and Drug Inspection Institute of Altay Prefecture in the Xinjiang Uygur Autonomous Region. The voucher specimen was kept at the Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing, Jiangsu Province. The deposition number of <i>I. indigotica</i> (1 ~ 27) was IIF<i>-</i>1506001 to IIF<i>-</i>1506027, and that of <i>I. tinctoria</i> (28) was ITL<i>-</i>1506001. All the samples were for plant research use only. The use of seeds in this study complied with the relevant institutional, national, and international guidelines and legislation.

: Not applicable.

: The authors declare that they have no competing interests.