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- W2365488276 abstract "The germination ratio of 345 species of germplasm sampled randomly from seven types of tobacco (flue_cured, sun_cured, burley, oriental and cigar tobacco, N. rustica, and wild species) in medium-term germplasm bank were tested and analyzed statistically with classified variance analysis, and the relationship between the storage age and germination ratio was studied combining with the track testing results of germination ratio. The results were as follows: 1) the average germination ratio of the population is 78.17%, the ratios of cigar, flue_cured and (burley) tobacco are 87.24%, 86.24% and 76.43%, respectively, the difference is extremely significant; 2) a three_class (germination ratioⅠ: 80%; Ⅱ: 60%-80%; Ⅲ: 60%) refreshing project for the medium_term bank was made, the frequency distribution of germination ratio falls mainly in classⅠ, and the next in classⅡ, namely, at present, there are about 600 species of germplasm (15%) needed be refreshed immediately, and about 1000 (30%) should be refreshed; 42.85% of burley germplasms distribute in classⅡ, the other 34.29% and 22 85% in classⅢ and classⅠ, respectively; the frequency distribution of germination ratio of other tobacco types is basically the same as that of the population; therefore burley tobacco should be refreshed firstly, then N. rustica; (3) the) decline of germination ratio of tobacco germplasm could be divided into three different stages: the faster (decline) stage in the first 5 years, the average decline rate is 1.5% per year; the moderate decline stage during the following 5 years; and the accelerated decline stage, the average decline rate is 2.3% per year. Under present (storage) conditions, the viability of most germplasms would be kept over 85% for 8-10 years, depending on the (initial) germination ratio of the tobacco germplasm and the physiology index of different tobacco types as well." @default.
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- W2365488276 date "2004-10-08" @default.
- W2365488276 modified "2023-09-23" @default.
- W2365488276 title "Comparison of Germination Ratio between Germplasms of Different Tobacco Types" @default.
- W2365488276 hasPublicationYear "2004" @default.
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