本文转自【中央广电总台中国之声】； 最近，一种名为"黑草莓"的高价水果引发热议，其外观别致呈暗红色，据称风味独特。因"黑草莓"种植技术要求 高、产量相对较低，目前在电商平台的售价从每斤50多元到300元不等。 史军表示，人们通过杂交育种来调节草莓中花青素的含量，根据颜色的遗传规律选配不同的亲本组合（杂交后 代的基因型与其亲本基因型相同的所有可能组合），最终获得一些颜色表现比较特殊的品种。但选育一个性状 表现特别好的品种比较困难，想得到果子大、口感好、香气足、颜色特别的草莓，过程会相对漫长些。 △隋珠草莓，因外外表深红发亮、口感甜软多汁、耐运输等特点，逐渐被人们熟识。 草莓颜色越深就越甜吗？ 在售卖草莓的直播中，有商家会展示一个草莓的甜度等级图。例如，红色的红颜草莓和"黑草莓"中的"真红美 玲""黑珍珠"被列在了高甜区域，而淡粉色的"粉玉"、偏白色的"白雪公主"和鲜艳红色的"晶玉"，则被划在了中 甜区。 史军表示，草莓的颜色深浅、甜度以及口感、香气等通常相对独立，好不好吃无法通过颜色深浅来推断。 相较于常见的品种，"黑草莓"的颜色为什么会变深？更深的颜色，代表着它更甜、更有营养吗？ 草莓为什么会"变黑"？ 在" ...

Core Viewpoint - Blackberry, often referred to as the "black diamond" of fruits, is gaining popularity in China due to its rich nutritional profile and health benefits, despite its high price and limited availability in certain regions [3][9]. Group 1: Nutritional Benefits - Blackberries contain a high water content of nearly 90%, making them refreshing and hydrating [3]. - They are rich in anthocyanins, with a concentration of 114.4 to 241.5 mg per 100 grams, which is significantly higher than strawberries (7-18 mg/100g) and grapes (20.6 mg/100g) [6][8]. - Regular consumption of blackberries can help maintain youthfulness and prevent chronic diseases, with studies indicating that increasing anthocyanin intake can reduce the risk of coronary heart disease by 12%-32% [6][8]. Group 2: Comparison with Other Berries - While blackberries have lower anthocyanin content compared to blueberries (387-487 mg/100g), they still outperform strawberries and grapes by 5 to 35 times [6]. - Blackberries also provide higher levels of vitamin C (21 mg/100g), dietary fiber (5.3 g/100g), and potassium (162 mg/100g) compared to blueberries [8]. Group 3: Market and Pricing - Fresh blackberries are relatively expensive in northern China, costing around 70-80 yuan for half a kilogram, making them a luxury item for many consumers [9]. - Frozen blackberries are a more affordable alternative, maintaining most of their nutritional value and flavor even after freezing [9][12]. Group 4: Storage and Preparation - Blackberries are sensitive to storage and transport, with a short shelf life at room temperature, typically lasting only two days [9]. - Freezing blackberries can preserve their nutrients, with studies showing that most compounds remain stable or even increase during freezing [12].

Core Insights - The article discusses the rising popularity of cherries, highlighting their health benefits and potential risks associated with overconsumption, especially for individuals with chronic health conditions [1][3]. Group 1: Health Benefits - Cherries are labeled as "blood sugar friendly" due to their low glycemic index (GI) value, which ranges from 29 to 63 depending on the variety and origin, making them suitable for moderate consumption by diabetics [1]. - The presence of anthocyanins and flavonoids in cherries may improve insulin sensitivity and slow down sugar absorption, potentially offering cardiovascular protection [1]. - The recommended daily intake for diabetics is about 150 grams, equivalent to approximately 15 cherries, to minimize blood sugar fluctuations [1]. Group 2: Misconceptions about Melatonin - Cherries contain a very low amount of melatonin, approximately 22 nanograms per 100 grams, which is insufficient for any therapeutic sleep benefits [2]. - Effective doses for sleep improvement typically require 1 to 3 milligrams of melatonin, indicating that relying on cherries for sleep aid is impractical [2]. - The concentration of melatonin in studies often comes from concentrated juice of European sour cherries, which is significantly higher than that found in fresh cherries [2]. Group 3: Risks of Overconsumption - Excessive consumption of cherries can lead to health issues, particularly for individuals with chronic conditions; for example, a case was reported where a patient consumed two to three kilograms of cherries, resulting in acute hyperkalemia and deteriorating kidney function [3][4]. - Cherries contain over 200 milligrams of potassium per 100 grams, which can be dangerous for those with impaired kidney function, as their ability to regulate potassium is compromised [4]. - Monitoring blood sugar levels after consuming cherries can provide better insights into individual responses compared to solely relying on GI values [4].

Core Viewpoint - The article emphasizes the advantages of domestic blueberries from Yunnan, highlighting their freshness, taste, and nutritional benefits compared to imported varieties. Group 1: Product Quality and Characteristics - Domestic blueberries from Yunnan are fresher and more flavorful than imported ones, with a taste described as rich and sweet-sour [6][22]. - The blueberries are larger, with a size of over 15mm, and have a higher juice content compared to those found in supermarkets [14][20]. - The cultivation process in Yunnan involves natural farming methods, using organic fertilizers and avoiding industrial pollutants, which enhances the quality of the fruit [22][24]. Group 2: Nutritional Benefits - Blueberries contain high levels of anthocyanins, ranging from 180 to 300 mg per 100g, which are known for their antioxidant properties [10][12]. - They are recognized as one of the five major health foods recommended by the Food and Agriculture Organization [12][31]. - The fruit is rich in proteins, vitamins, and minerals, making it a highly nutritious option for consumers [31]. Group 3: Harvesting and Distribution - The harvesting process is meticulous, involving hand-picking to ensure the fruit's integrity and nutritional value is preserved [26][27]. - The company employs express delivery methods, such as using SF Express, to ensure that customers receive the freshest blueberries within 72 hours of harvest [29]. - The entire process from picking to packaging is designed to minimize contact with the fruit, ensuring high quality and freshness upon delivery [29][27]. Group 4: Marketing and Promotions - The company is running a promotional campaign from December 22 to January 22, allowing customers to purchase blueberries using a points system, enhancing accessibility [37].