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Identification of the rice Rc gene as a main regulator of seed survival under dry storage conditions

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Title Identification of the rice Rc gene as a main regulator of seed survival under dry storage conditions
 
Creator Prasad C.T., Manjunath
Kodde, Jan
Angenent, Gerco C.
Hay, Fiona R.
McNally, Kenneth L.
Groot, Steven P.C.
 
Subject storage conditions
germination
seedling emergence
genetic variation
single nucleotide polymorphism
allelic variation
flavonoids
hybrid vigour
keeping quality
storage conditions
 
Description Seed deterioration during storage results in poor germination, reduced vigour, and non-uniform seedling emergence. The aging rate depends on storage conditions and genetic factors. This study aims to identify these genetic factors determining the longevity of rice (Oryza sativa L.) seeds stored under experimental aging conditions mimicking long-term dry storage. Genetic variation for tolerance to aging was studied in 300 Indica rice accessions by storing dry seeds under an elevated partial pressure of oxygen (EPPO) condition. A genome-wide association analysis identified 11 unique genomic regions for all measured germination parameters after aging, differing from those previously identified in rice under humid experimental aging conditions. The significant single nucleotide polymorphism in the most prominent region was located within the Rc gene, encoding a basic helix-loop-helix transcription factor. Storage experiments using near-isogenic rice lines (SD7-1D (Rc) and SD7-1d (rc) with the same allelic variation confirmed the role of the wildtype Rc gene, providing stronger tolerance to dry EPPO aging. In the seed pericarp, a functional Rc gene results in accumulation of proanthocyanidins, an important sub-class of flavonoids having strong antioxidant activity, which may explain the variation in tolerance to dry EPPO aging.
 
Date 2023-03-08
2023-11-06T01:42:23Z
2023-11-06T01:42:23Z
 
Type Journal Article
 
Identifier Prasad CT, Manjunath, Jan Kodde, Gerco C. Angenent, Fiona R. Hay, Kenneth L. McNally, and Steven PC Groot. "Identification of the rice Rc gene as a main regulator of seed survival under dry storage conditions." Plant, Cell & Environment 46, no. 6 (2023): 1962-1980.
0140-7791
https://hdl.handle.net/10568/132730
https://onlinelibrary.wiley.com/doi/10.1111/pce.14581
https://doi.org/10.1111/pce.14581
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 1962-1980
application/pdf
 
Source Plant, Cell and Environment