Identification of rice seeds
Although some seed morphological characteristics can be used
successfully for seed identification, it is very difficult even for
taxonomists to apply them correctly and there are species whose seeds
are difficult to identify by morphology only. This explains why the
wrong seeds were occasionally distributed to users. Here, we show that
17% of seeds were mislabeled, a figure high enough to deserve serious
consideration. Although no algorithm has improved the assignment of
specimens to species (Spouge & Mariño-Ramírez, 2012), our findings
suggest that phylogenetic methods offer the most reliable but also the
least sensitive approach in this respect. At species level, samples in a
monophyletic clade with a reasonable bootstrap support belong to the
same species.
Acknowledgement
We
thank Wenpan Dong for guidance on chloroplast genome assembly. This
study was partly supported by the Strategic Priority Research Program of
the Chinese Academy of Sciences, Grant No. XDA 19050303 & XDA 23080204,
and the Fundamental Research Funds for the Central Public-Service
Research Institute [2018JB001].
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