Known as a pioneer herb on the moving sand dunes of Central Asia, sand rice has been recommended as a potential future crop due to its excellent drought tolerance and rich nutritional value.
Recently, a research team led by Prof. Zhao Pengshan from the Northwest Institute of Eco-Environment and Resources of the Chinese Academy of Sciences identified the tricotyledony occurrence from natural populations of sand rice and isolated the mutant seedlings with more than two cotyledons from the chemical mutagenesis library, to assess the evolutionary significance and genetic basis of the cotyledon number in dicotyledon species.
The tricotyledonous seed quality of sand rice varied in different regions. Tricotyledonous plants at Duolunbei showed defects in seed development, while tricotyledonous plants at Shigatse showed significant increases in seed weight, suggesting that tricotyledonous plants are associated with growth phenotypic variation in different accessions.
This result suggested that cotyledon number change could produce some correlated variation in adult phenotypes, which in turn affect the fitness of the sand rice to the
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