高能混合粒子场与^(60)Co-γ射线辐照龙牧803紫花苜蓿产量性状遗传效应研究

Production Heritability Comparison of Mutation Induction by Mixed High Energy Particle Field and γ-rays Irradiation in Alfalfa Longmu 803

在经过高能混合粒子场和γ射线分别以109、145、195、284和560Gy剂量处理的10组龙牧803紫花苜蓿M1中,每剂量优选出该组中产量与其它株有显著差别的单株,取种子种植M2,并将产量数据整理后进行遗传力和遗传进度分析。结果表明:高能混合粒子场处理过的紫花苜蓿遗传力高于相同剂量的γ射线处理,两种处理方法的高剂量遗传力要高于低剂量处理。证明高能混合粒子场处理苜蓿诱变干种子比γ射线更适宜早期选择,高剂量要好于低剂量。入选株中高能粒子284Gy的遗传进度最高,进行选择的效果最好。

Dry seed of ten group alfalfa Longmu 803 were irradiated by mixed high-energy particle field（CR） and 60Co γ-rays with five doses,i.e.,109,145,195,284,560 Gy.The seeds from the plant that significant different from other plants in yield of each dose were planted M2,then the yield data of M2 were used to analyze hereditary capacity and genetic advance.The result showed that the heritability of the CR group was better than that of the 60Coγ-rays group at the same dose.The hereditary capacity of high dose was higher than that of low dose in both CR and 60Co γ-rays treatments.So the dry seeds treated by CR was more fit for early selection compared to 60Co γ-rays,and the higher dose was better.The genetic advance of the selected plant was highest in 248 Gy,and the selecting effect was the best.