云南广适性高产耐寒抗病粳稻新品种合系41号的选育

Breeding of Hexi 41,a new japonica rice variety with extensive adaptability,high yield,cold endurance and blast resistance in Yunnan

以滇靖8号为母本,合系22 2为父本进行杂交,选育过程中采取高产、品质、耐寒性、稻瘟病抗性四特性同步鉴定作为选种的科学依据,以综合性状好的高代系统进行多点试种,育成的合系41号具有丰产稳产性好(平均每公顷比其他主栽品种增产660～1605kg)、品质中等、耐寒性强、高抗稻瘟病、适应性广(能适应云南省海拔1400～2000m地区及四川凉山州、黔西北和湘西等类似地区种植)、综合性状优良等特点,现成为云南省历史上粳稻自育种中栽培面积最大的品种。

Hexi 41 was bred by crossing,using Dianjing 8 as maternal parent,Hexi 222 as paternal parent.We evaluated appearance quality from low generations and synchronously evaluated high yield,cold endurance,blast resistance and quality in the variety test,the evaluating results provided scientific basis for breeding.High generation systems are planted in many tested sites.Selected Hexi 41 have synchronously five characters,high and stable yields(6601605?kg/ha higher than that of control variety),medium quality,strong coldendurance,high resistance to blast and extensive adaptability(suitable to be planted in areas with an elevation of 1400-2000?m as in Yunnan and Liangshan prefecture in Sichuan,Northwest Guizhou,West Hunan and other similar regions).Now it has become the biggest cultivated area of Japonica rice variety in history of Yunnan province.