【摘要】 小麦品种苏麦3号的21个单体系统经诱变剂量的⁶⁰Co-γ射线照射后,不同单体及不同性状的辐射敏感性表现不同,在抗赤霉病性上,按接种至始症发病天数、接种至穗轴发病天数、接种后第15天病小穗数、腊熟期病小穗数及病小穗率等几个指标统计,辐射后二体表现不敏感,却有几个单体系表现敏感提高了抗性.对于分蘖数、抽穗期、株高、剑叶长和宽,每穗小穗数等性状,二体与单体的表现趋势相同,只有4A的敏感性最大.更多还原

【Abstract】 21 monosomic Unes of Triticum aestivum c.v. Sumai 3 were irradiated with moderate dosage of γ-rays of 60Co. Different sensitivities were observed in different monosomics and with different traits. By using days from inoculation to the appearance of symptoms, days (of the spreading of disease) from inoculation to the infection of the rachis number of spikelets infected 15 days after inoculation and the % of infected spikelets at the hard dough stage as criteria, it could he seen that the disomic was not sensitive to γ-rays irradiation, but some monosomic lines were so; they became more resistant to scab after irradiation. The agronomic traits, including the number of tiller, heading date, plant height, flag leaf length and width and number of spikelets per spike, of the monosomics were similar to those of the disomics; except 4A which was more sensitive to irradiation.更多还原