Investigations of the Rough Rice Grains Stored in Airtight Conditions since 1904 and 1906

Kondō, Mantarō; Okamura, Tamotsu

doi:10.1626/jcs.4.158

Cited by 1 publication

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“…In a previous study, it was confirmed that the germination ability of the preserved seeds had been lost already, but the nutritional and eating quality had been preserved quite well ( Fukumoto et al 2002 , Kondo and Okamura 1932 ). Therefore, it was inferred that the DNA condition had also preserved well.…”

Section: Discussionmentioning

confidence: 84%

“…It is unknown how many landraces these consist of or their variety names. These seeds were heat-dried once for 10 hours at 50–58°C after being hulled and then packed in cans to preserve them ( Kondo and Okamura 1932 ). The seeds were pale brown in color ( Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The materials used in this study were rice stocks for emergency food stored about 100 years go in the Meiji era by a farmer in Inabu-cho, Toyota city, Aichi prefecture ( Ezaki 1969 , Kondo and Okamura 1932 ). This component and eating quality of this preserved rice have been reported previously, and it was confirmed that germination ability had been lost ( Ezaki 1969 , Fukumoto et al 2002 , 2003 , Kondo and Okamura 1932 ). However, the genetic background of these rice has not investigated.…”

Section: Introductionmentioning

confidence: 99%

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Genetic diversity of preserved rice seed samples from the Mikawa area, Japan, stored in the Meiji era

et al. 2020

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Preserved rice ( Oryza sativa L.) seeds stored for nearly a century as an emergency food stocks from the Mikawa area were investigated for their genetic diversity. Morphologically, the seeds appeared to be typical Japonica. One chloroplast INDEL petN-trnC , two nuclear INDELs Acp1 and Cat1 , and three SNP markers in Starch synthase IIa were amplified to characterize the molecular profile. The efficiency of amplification varied among the markers. Most of preserved seeds were classified as Japonica, but some were identified as Indica. The heterozygous genotypes detected suggested a high frequency of outcrossing at that time. On the other hand, 21 SSR markers showed quite a high degree of amplification efficiency. Principal coordinate analysis and STRUCTURE analysis based on the SSR polymorphisms proved that the preserved seeds contained alleles that were not detected among current landraces and breeding varieties, and there were the expected three subpopulations among 96 preserved seeds. These results indicated that these preserved seeds from Mikawa area in Meiji era had high genetic diversity and consisted of some subpopulations including Indica landraces with typical Japonica seed shape. These lines were considered to have been lost from current genetic resources.

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Section: Discussionmentioning

confidence: 84%

Section: Methodsmentioning

confidence: 99%