The tested results indicated that the elongating seedling was induced when the content of GA3 in rice seed per gram was equal to or more than 94. 6 ng. The content of GA3 in F1 seed per gram was 23. 8, 49. 5, 53. 5 an...The tested results indicated that the elongating seedling was induced when the content of GA3 in rice seed per gram was equal to or more than 94. 6 ng. The content of GA3 in F1 seed per gram was 23. 8, 49. 5, 53. 5 and 63. 5 ng respectively when the dosage of gibberellin was 0, 8, 13 and 18 g per 667 m2 in the hybrid rice seed production. These contents in the hybrid rice seed were much less than 94. 6 ng which could induce the rice seed to grow up elongating seedling. However, significant correlation existed between the content of GA3 in F1 seed and dosage of gibberellin in hybrid rice seed production. The further experiments proved that all of the aforementioned dosage of gibberellin could not induce the elongating seedling in F1 and that the elongating seedling in hybrid rice was caused by Gibberella fuiikuroi which infected the seed during blooming stage.展开更多
用生物素（Biotin-16-dUTP)标记的大麦Betzes基因组DNA作探针，以普通小麦中国春总DNA作封阻进行基因组原位杂交（Genome in situ hybridization,简称GISH），从13株小麦-大麦杂交后代中鉴定出2个含有3条大麦Betzes 2H染色体的材料（2n...用生物素（Biotin-16-dUTP)标记的大麦Betzes基因组DNA作探针，以普通小麦中国春总DNA作封阻进行基因组原位杂交（Genome in situ hybridization,简称GISH），从13株小麦-大麦杂交后代中鉴定出2个含有3条大麦Betzes 2H染色体的材料（2n＝43）；2个2H单体异代换系（2n＝42）；7个2H二体异代换系（2n＝42）。用已定位在小麦第2部分同源群短臂上的探针psr131进行RFLP分析，结果表明大麦Betzes、代换系A5有1条区别于小麦中国春的特异带，A5的2条2A染色体被大麦Betzes的2条2H染色体所代换。GISH及RFLP的准确鉴定及小麦－大麦2H二体异代换系的首次获得，为向小麦导入2H染色体上的有用基因提供了宝贵材料。展开更多
报道了东北地区农田主要杂草上的病原真菌19属41种,寄生在14个科26个属的寄主植物上。其中新种1个:问荆柱盘孢(Cylindrosporium equisetiLiu et Bai);东北地区首次报道种5个。对每个种列出学名、寄主、生境和分布,所有标本保藏在解放军...报道了东北地区农田主要杂草上的病原真菌19属41种,寄生在14个科26个属的寄主植物上。其中新种1个:问荆柱盘孢(Cylindrosporium equisetiLiu et Bai);东北地区首次报道种5个。对每个种列出学名、寄主、生境和分布,所有标本保藏在解放军军需大学真菌标本室。展开更多
文摘The tested results indicated that the elongating seedling was induced when the content of GA3 in rice seed per gram was equal to or more than 94. 6 ng. The content of GA3 in F1 seed per gram was 23. 8, 49. 5, 53. 5 and 63. 5 ng respectively when the dosage of gibberellin was 0, 8, 13 and 18 g per 667 m2 in the hybrid rice seed production. These contents in the hybrid rice seed were much less than 94. 6 ng which could induce the rice seed to grow up elongating seedling. However, significant correlation existed between the content of GA3 in F1 seed and dosage of gibberellin in hybrid rice seed production. The further experiments proved that all of the aforementioned dosage of gibberellin could not induce the elongating seedling in F1 and that the elongating seedling in hybrid rice was caused by Gibberella fuiikuroi which infected the seed during blooming stage.
文摘用生物素（Biotin-16-dUTP)标记的大麦Betzes基因组DNA作探针，以普通小麦中国春总DNA作封阻进行基因组原位杂交（Genome in situ hybridization,简称GISH），从13株小麦-大麦杂交后代中鉴定出2个含有3条大麦Betzes 2H染色体的材料（2n＝43）；2个2H单体异代换系（2n＝42）；7个2H二体异代换系（2n＝42）。用已定位在小麦第2部分同源群短臂上的探针psr131进行RFLP分析，结果表明大麦Betzes、代换系A5有1条区别于小麦中国春的特异带，A5的2条2A染色体被大麦Betzes的2条2H染色体所代换。GISH及RFLP的准确鉴定及小麦－大麦2H二体异代换系的首次获得，为向小麦导入2H染色体上的有用基因提供了宝贵材料。
