^(60)Co-r射线辐照处理后小豆农艺性状诱变参数研究

A Study of Mutagen Parmeter in Agronomical Parameters After Adzuki Bean Irradiated by ^(60)Co-r-ray

利用60Co－r射线对3个小豆品种的干种子加以辐照处理，其剂量分别为0（CK）、100、200、300、400、500、700Gy，研究了不同辐射剂量处理M1、M2代5个农艺性状的诱变参数．结果表明：（1）M1代农艺性状均有不同程度受抑制，其平均数与辐照剂量呈负相关，且M1的变异是多方向的，对剂量的敏感程度也因品种、性状而异；辐照处理致变力（h12）京农2号在400～500Gy剂量处理下综合5个性状为最大，而冀红四号在200Gy剂量处理下综合5个性状为最大．（2）M2代株高、主茎节数、单株荚数的平均数在400Gy处理时均比对照显著增高，从变异系数的大小来看，M2变异范围较大的剂量株高为400～500Gy、单株美数为300～400Gy、荚长为400～700Gy和单荚粒数为300Gy左右．（3）诱导变异遗传力（h22）反映了通过辐射诱变获得的遗传变异方差占总方差的比率，单株荚数在辐射剂量为300～400Gy、株高在400Gy时的h22、GS、RGS较大．

The three dry seeds of Adzuki Beau were irradicted with different doses of 60Co-r-ray,varing 0, 100, 200, 300, 400, 500, 700 ray: The five parameters of agronomic characters in M, and M2 showed that: (1) M1 generation were inhabited generally in different degrees, its average value was negative correlate, its variation were mere multidirection, its sensibility were varied from variety and chracters: its iradicted variated value (h12) of 'jing nong 2' between 400 to 500Gy among five characters comprehensively was the largest, but the ' Ji hong 4' was 200Gy.(2) It was a notable increase that the average value of plant length and the node numbers of main stem and pod numbers, the plant length of M, was 400～500Gy, the pods per plant and pod length and grain numbers were between 300～400Gy and 400～700Gy and 300Gy. (3) The induced varied heritability of (h22) in pod numbers per plant and plant length was more at 300～400Gy and 400Gy in separate.