【摘要】 利用陈永强“氯仿—异戊醇—核酸酶法”首次对普通小麦、燕麦、水稻、玉米、冰草５种作物以及同种作物的不同品种和不同器官的ＤＮＡ进行提取，结果表明，不同作物的幼穗ＤＮＡ浓度不同，冰草幼穗ＤＮＡ浓度（０．７５μｇ／ｍｌ）是燕麦幼穗的４倍，玉米和水稻的幼穗ＤＮＡ浓度很接近，为０．３６３μｇ／ｍｌ和０．３７８μｇ／ｍｌ。同一种作物不同品种的幼穗ＤＮＡ浓度也不同，爆裂玉米品种幼穗ＤＮＡ浓度（０．５５μｇ／ｍｌ）是掖单１９号的３．１倍，水稻品种２１６的ＤＮＡ浓度高于宁糯４号和５１，通北燕麦的幼穗ＤＮＡ浓度高于其它３种燕麦。同一种作物不同器官的ＤＮＡ浓度也不一致，幼穗的ＤＮＡ浓度高于幼茎。更多还原

【Abstract】 DNA concentrations of 5 crops, common wheat, oat, paddy rice, corn and wheatgrass, and their various varieties and organs were identified using Cheng Yongqiang “Chloroform-Isoamyl Alcohol-Nuclease Method" for the first time. The results show that the concentrations of DNA of the young ears of different crops are different, for example, the DNA concentration of the young ears of wheatgrass (0.75μg/ml) is 4 times that of the young ears of oat, the DNA concentrations of corn and paddy rice are close to each other, 0.363μg/ml and 0.378μg/ml respectively. The DNA concentrations of different varieties of the same crop are also different, for example, the DNA concentration of the young ear of popcorn (0.55μg/ml) is 3.1 times that of Yedan No.19, the DNA concentration of paddy rice variety 216 is higher than that of Ningnuo No.1 and 51, the DNA concentration of the young ears of Tongbei oat is higher than those of 3 other kinds of oats. The DNA concentrations of different organs of the same crop are also different with the DNA concentration of the young ear higher than that of the young stem.更多还原