云南省镇雄县耐晚霜核桃选优初报

Preliminary Report on the Selection of Late Frost Tolerant Walnut in Zhenxiong County of Yunnan

[目的]对镇雄县耐晚霜核桃开展调查和选优。[方法]2008—2017年,对云南省镇雄县核桃优良单株耐晚霜特性和优良性状开展筛选调查。[结果]通过多次观察、筛选,评选出优良单株13株,其三径均值为2.85～3.42 mm、壳均厚为0.71～1.10 mm、易取整仁、出仁率为53.2%～67.6%,耐晚霜特性突出,生长性状表现良好,其中镇核1号和镇核2号通过省级林木良种认定。[结论]所选13株优良单株整体上果型端正、易取整仁,壳厚、出仁率、充实度、丰产性能和口感均表现突出。

[Objective]Investigation and breeding of late frost resistant walnut in Zhenxiong County were carried out.[Method]In the past 2008-2017 years, we screened and investigated the characteristics of late frost tolerance and excellent characters of walnut excellent single plant inZhenxiong County, Yunnan Province.[Result]We selected 13 excellent single plant several times. The average diameter of the three diameter was2.85-3.42 mm, the average shell was 0.71-1.10 mm, it was easy to get the kernel, the kernel rate was 53.2%-67.6%, and the late frost resist-ance was outstanding. The long characters were good, Zhenhe No. 1 and Zhenhe No. 2 were identified by tree species at provincial level.[Conclu-sion]The selected 13 excellent single plants have good overall fruit shape and are easy to take whole kernel. Their shell thickness, yield, full-ness, fertility and taste are all outstanding.