优质早籼“湘辐994”的选育

MUTATION BREEDING OF XIANGFU 994——A NEW EARLY MATURITY RICE VARIETY WITH GOOD QUALITY

用60 Coγ射线 30 0Gy处理湘辐 87 1 2 湘早籼 2 0号F2 代干种子 ,经多代选育 ,育成了优质早籼水稻新品种湘辐 994,该品种产量一般为 690 0～ 72 5 0kg hm2 ,米质优良 ,抗病性较好。 2 0 0 3年通过湖南省品种审定。

The F-2 dry seeds of the rice variety,Xiangfu 87-12/Xiangzaoxian 20 were irradiated with {}+{60}Co γ-rays(300Gy).After several generations a rice variety,Xiangfu 994,with good quality and early maturity was selected.The experience of irradiation and hybridization breeding in rice are summerised in this paper.