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供试材料为1968年旱季收获的籼稻品种Siam 29和Peta,其种子(含水量为8～9%)已在国际水稻种质库中期贮藏室内保存20年,8次重复,25粒/重复,鉴定种子上形成芽孢的真菌类型和感染率。结果在这些种子上共发现9个真菌属(见表),其中2个品种均带有大量的Trichoconiella和Curvularia属真菌,但Fusarium、Drechslera和Phyllosticta 3个属的真菌仅大量存在于Peta品种之上,另外几个属的真菌只少量存在,这些差异可能是由于品种的不同而引起的。Siam 29和Peta 2个品种的发芽率分别为78.5%和45.5%,故Peta品种上带有大量真菌可能与低发芽率有关。由于在贮藏过程中,低温、干燥条件也能使许多休眠真菌得到长期保存,所以,当种质长期贮藏在基因
The tested materials were Siam 29 and Peta, indica rice varieties harvested in the dry season of 1968. The seeds (water content of 8-9%) had been stored in the International Rice Germplasm Bank for 20 years, 8 times, 25 seeds / repeat, Identification of spores on the seeds Fungus types and infection rates. As a result, 9 fungi (see table) were found on these seeds, of which 2 species contained a large number of fungi belonging to the genus Trichoconiella and Curvularia, but the fungi belonging to the genus Fusarium, Drechslera and Phyllosticta were present in large quantities only on the Peta variety , And few other genus fungi exist in small quantities, these differences may be due to different varieties caused. The germination rates of Siam 29 and Peta were 78.5% and 45.5%, respectively. Therefore, a large amount of fungi in Peta varieties may be related to low germination rate. Due to the long-term preservation of many dormant fungi during cryogenic and dry conditions during storage, when germplasm is stored for long periods of time in the gene