红宝石系山西省农业科学院果树研究所用国光苹果作母本、元帅苹果为父本杂交育成的优良苹果品种。该品种果实扁圆形,底色黄绿,彩色浓红,适时采收时着色面积达95%以上。单果平均重165克左右,果点小较密,梗洼较深,果面无锈。萼片直立闭合,萼洼浅平。果皮薄,果肉乳白色,肉质酥脆,汁液多。风味香甜,品质上等。在晋中地区10月中下旬果实成熟,采前落果轻,不裂果,无苦痘病。在一般土窑洞内可贮藏至翌年6月份,去皮硬度5.29公斤/平方厘米。幼树树势强健,结果后渐中庸,萌芽力强,成枝力 Ruby Department of the Academy of Agricultural Sciences, Shanxi Academy of Agricultural Sciences Guoguang apple as female parent, marshal apple as male parent hybrid fine bred apple varieties. The variety of fruit oblate, background yellow-green, color red, timely coloration when the area of ​​more than 95%. The average weight of about 165 grams of fruit, small fruit point more dense, deep depression stems, fruit surface without rust. Sepals erect closed, calyx depression shallow flat. Peel thin, white flesh, succulent crisp, juicy. Sweet flavor, high quality. In mid-Jinzhong region in mid-to late mature fruit, before harvest fruit light, no crack, no bitter pox disease. Can be stored in the general soil cave to the following year in June, peel hardness 5.29 kg / cm. Saplings strong tree, the results gradually moderate, strong sprout, branch force