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一、品种来源及特征特性 “Ⅱ优838”是由不育系“Ⅱ—32A”与优良恢复系“辐射838”组配而成的,它与当前的大面积推广的“汕优63”相比,具有五个突出特点:1.产量高,一般亩产比对照“汕优63”增产10％左右,豫南稻区试验两年平均亩产616公斤,比对照种“汕优63”亩产563公斤增产:9.4％;2.米质优,米粒腹白小,糙米率80.4％,精米率70.6％,食味和外观品质等均优于对照;3.抗性强,经病菌接种鉴定和大面积种植表现中抗稻瘟病和白叶枯病,抗倒伏能力强;4.适应性广:能种植“汕优63”的地区均可种植;5.制种产量高,与“汕优63”相比,一般制种田制种产量高达60
First, the source of varieties and characteristics of “Ⅱ You 838” is a combination of sterile line “Ⅱ-32A” and the excellent restorer “Radiation 838” made with the current large-scale promotion of “Shanyou 63” phase Compared with the control, “Shanyou 63” mu is higher than that of the control “Shanyou 63”, and the average output per mu is about 10% higher than that of the control “Shanyou 63” Produce 563 kilograms increase yield: 9.4%; 2. The quality of rice, rice belly white, brown rice rate of 80.4%, 70.6% milled rice, taste and appearance quality are better than the control; 3. Strong resistance, Large-scale planting performance in the resistance to rice blast and bacterial leaf blight, lodging resistance; 4 wide adaptability: to be able to plant “Shanyou 63” regions can be planted; 5 seed production is high, and "Shanyou 63 Compared to the general system of seed production up to 60 species