抗褐变马铃薯品种(系)鉴定与筛选

马铃薯块茎易受到损伤引发褐变,褐变会对其营养、感官品质和安全性造成影响。不同马铃薯品种材料抗褐变能力存在差异,本研究拟测定27份不同马铃薯种质材料的多酚氧化酶活性、褐变强度、褐变指数和煮后褐变4个褐变相关指标,综合分析以实现对不同马铃薯品种(系)抗褐变能力的鉴定与筛选。结果表明, 27份材料可分为4种类型,第1类高抗褐变,包括09306-82和13041-52,它们4项指标均能满足抗褐变材料的要求;第2类抗褐变材料,包括延薯4号、Q8、12-1、春薯3号、19-1、14018-142、大西洋、龙薯12号、威芋5号、丽薯6号、春薯5号和早大白,它们的褐变相关指标存在个别明显不足;第3类中度褐变材料,包括09001-136、中薯5号、龙薯4号、东农310、青薯9号、15-1、云薯505、BF006、闽薯1号和黔芋8号,其抗褐变能力弱;第4类是易褐变材料,包括春薯6号和费乌瑞它,它们不具有抗褐变能力或抗褐变能力非常差。筛选的高抗褐变和抗褐变品种(系)可以作为鲜食抗褐变马铃薯育种材料,为马铃薯净菜加工提供品种支撑,易褐变材料可用于马铃薯褐变机制的基础性研究。

Identification and selection for anti-browning potato varieties (lines)

Potato tuber is easy to be damaged and caused browning, which will affect its nutrition, sense quality and safety. Different potato varieties have different resistances to browning. In this study, 27 different potato germplasm resources,were used to measure four indexes including polyphenol oxidase (PPO), browning degree (BD), browning index and after cooking darkening (ACD), for indentifying and selecting anti-browning potato varieties (lines). The 27 materials could be divided into four groups. High anti-browning, group including 09306-82 and 13041-52 had high resistance to browning. Anti-browning group, included Yanshu 4, Q 8, 12-1, Chunshu 3, 19-1, 14018-142, Atlantic, Longshu 12, Weiyu 5, Lishu 6, Chunshu 5, and Zaodabai, had some obvious deficiencies in the related anti-browning indicators. Medium anti-browning group, including 09001-136, Zhongshu 5, Longshu 4, Dongnong 310, Qingshu 9, 15-1, Yunshu 505, BF006, Minshu 1, and Qianyu 8, had poor resistance to browning. Easy browning group, containing Chunshu 6 and Favorita, had very weak resistance to browning. The selected varieties (lines) with very high or high resistance to browning can be used in potato breeding for browning resistance , providing variety support for potato processing industry, and the easy browning materials can be used to study the browning mechanism of potato.