甜樱桃早、中熟品种生物学特性及果实性状综合评价

程 亮1,黄泰山2,赵雅琦2,张文远2,邓建军2*

1天水市果树研究所,甘肃天水 741000; 2蔬菜生物育种全国重点实验室·中国农业科学院蔬菜花卉研究所,北京 100081)

摘 要:【目的】明确天水地区引种的甜樱桃品种生长特性与品质特点,筛选适宜当地栽培的优良品种。【方法】本研究通过调查黑珍珠、秦林、鲁玉、斯帕克里、瑞德、布鲁克斯、乌梅极早、彩玉和含香9个甜樱桃品种的物候期、树体及叶片形态特征,分析其果实形态及生理品质,并结合主要经济性状分析进行综合评价。【结果】甜樱桃不同品种形态特征、生物学特性、外观品质、功能营养成分含量、果形指数和单果质量均存在差异。秦林、斯帕克里、瑞德、布鲁克斯和含香的平均单果质量在10.21~11.63 g,瑞德、含香和秦林的总糖含量最高,乌梅极早和含香的酚类物质和维生素C含量最高。【结论】秦林、斯帕克里、瑞德、布鲁克斯和含香的果实个大、色美、酸甜可口、可食率高、果实营养品质良好,具有潜在的经济价值,适宜天水地区种植。

关键词:甜樱桃;引种表现;品质特性;果实营养;天水地区

甜樱桃(Prunus avium L.),又名大樱桃,属蔷薇科(Rosaceae)李亚科(Prunoideae)樱桃亚属樱属(Cerasus Mill.)落叶乔木果树,原产于亚洲西部和欧洲东南部[1-3]。甜樱桃早在4000~5000 a(年)前就开始被栽培驯化,其果实素有“宝石水果”之称,因其丰富的营养价值和良好的经济效益被美国农民称为‘黄金种植业’,具有广阔的发展前景[4-7]。甜樱桃喜温喜光,对种植地区的气候和环境条件要求很高。天水市位于甘肃省东南部,属于暖温带半湿润半干旱气候,横跨黄河和长江两大水系,境内土层深厚、光照充足、气候温润、昼夜温差大等自然条件匹配合理,是落叶果树的最适产区,同时也是西北地区为数不多的适宜发展甜樱桃产业的地区[8-9]。从20世纪80年代开始引进种植甜樱桃,截止到2020年,天水市大樱桃种植面积约4300 hm2,结果面积60%以上,年产量2.11万t,年产值4亿元以上[10]。随着物流冷链运输的发展和电商行业的兴起,甜樱桃销售遍布全国各地。但现有主栽品种已满足不了全国市场发展的需求,市场需求向果实颜色艳丽、硬度高、风味优、品质高、耐贮运等方面转变[11]。因此开展甜樱桃果实的表型性状分析及综合评价、推动甜樱桃种质保存创新利用和优异种质资源筛选具有重要的意义[12]。2015年,笔者引进了黑珍珠、秦林、鲁玉、斯帕克里、瑞德、布鲁克斯、乌梅极早、彩玉和含香9个甜樱桃品种在天水地区进行栽培试验,观察了其物候期、植物学特征、生物学特性及果实品质性状。

1 材料和方法

1.1 材料与试剂

试验材料于2015年3月20日定植于天水市果树研究所甜樱桃品种园,砧木为大青叶,试验地海拔为1 272.4 m,极端最低气温-15.2 ℃(2022年12月),极端最高气温36.5 ℃(2022年7月),年平均气温10.66 ℃,年降水量494.8~634.6 mm,土壤pH值为8.2~8.59,年日照时数范围在1651~1790 h。所调查甜樱桃品种植株树势、大小基本一致,土壤为壤砂土,有机质含量(w,后同)28.24 g·kg-1(深度20~40 cm)。

浓硫酸、盐酸、磷酸、甲醇(均为分析纯),天津光复精细化工研究所;氢氧化钠、无水乙醇、维生素C、蒽酮、蔗糖(均为分析纯),广东光华科技股份有限公司;三氯化铁(分析纯),上海阿拉丁生化科技股份有限公司;4,7-二苯基-1,10-菲咯啉(4,7-diphenyl-1,10-phenanthroline bathophenanthroline,BP)(分析纯),美国Sigma公司。

1.2 仪器与设备

350-8519型万分之一分析天平瑞士Precisa公司;EPS-3001便携式电子天平,长沙湘平科技发展有限公司;EZ-SZ500N型物性分析仪、UV-1240型紫外-可见分光光度计,日本岛津公司;FT-327型水果硬度计,意大利Turoni公司;CR-10型色差仪,日本Konica Minolta公司;WYT-4型手持折光计,上海精密仪器仪表有限公司;FE30型电导率仪,瑞士Mettler Toledo公司;H1850型高速离心机,湖南湘仪实验室仪器开发有限公司;UHH-S4型恒温水浴锅,北京科伟永兴仪器有限公司;DGG-9140A型电热恒温鼓风干燥箱,上海森信实验仪器有限公司;ISS110-230型真空浓缩仪,美国Thermo Fisher Scientific公司。

1.3 方法

1.3.1 生物学特性调查 2022—2024年,通过观察各品种甜樱桃萌芽、开花、成熟、落叶各个时期,并参照《樱桃种质资源描述规范和数据标准》[13]对花芽萌动期、始花期、盛花期、末花期、果实成熟期、落叶期、果实生育期进行调查与记录,表1中数据为3年平均值。

表1 物候期观测
Table 1 Observations of the phenological periods

品种Cultivar花期Florescence/黑珍珠Heizhenzhu秦林Chelan鲁玉Luyu斯帕克里Sparkle瑞德Glenred布鲁克斯Brooks乌梅极早Cкopocпeлкa彩玉Caiyu含香Hanxiang萌动期Germination stage 3月25日March 25th 3月23日March 23rd 3月24日March 24th 3月26日March 26th 3月23日March 23rd 3月22日March 22nd 3月23日March 23rd 3月23日March 23rd 3月25日March 25th始花期Early flowering stage 4月13日April 13th 4月7日April 7th 4月10日April 10th 4月10日April 10th 4月8日April 8th 4月8日April 8th 4月10日April 10th 4月10日April 10th 4月8日April 8th盛花期Blooming stage 4月17日April 17th 4月10日April 10th 4月12日April 12th 4月13日April 13th 4月10日April 10th 4月10日April 10th 4月12日April 12th 4月14日April 14th 4月13日April 13th末花期Final flowering stage 4月22日April 22nd 4月15日April 15th 4月16日April 16th 4月17日April 17th 4月17日April 17th 4月15日April 15th 4月22日April 22nd 4月18日April 18th 4月17日April 17th d986797789果实成熟期Fruit ripening period 6月12日June 12th 6月1日June 1st 6月6日June 6th 6月3日June 3rd 6月5日June 5th 6月10日June 10th 6月5日June 5th 6月10日June 10th 6月6日June 6th果实生育期Fruit growth period/d 51营养生长期Vegetative growth phase/d 229 46240 50235 47235 49233 56238 44233 53236 50落叶期Deciduous period 11月11日November 11th 11月18日November 18th 11月14日November 14th 11月16日November 16th 11月11日November 11th 11月16日November 16th 11月11日November 11th 11月14日November 14th 11月16日November 16th 238

1.3.2 树体及叶片形态特征 每个甜樱桃品种选择树体大小一致、结果正常的5株进行调查,观察树体类型、树姿、生长势、1年生枝条皮色,用游标卡尺测量节间长度(极短:≤1.5 cm,短:>1.5~3.0 cm,中:>3.0~4.5 cm,长:>4.5~6.0 cm,极长:>6.0 cm);叶片形态特征包括观察叶片春嫩叶色、叶色、叶形、叶尖形状、叶基形状、叶缘形状、叶背被毛、叶腺形状、叶腺颜色、叶腺数量、叶腺大小。

1.3.3 果实形态及生理品质分析 2024年6月,选取不同甜樱桃品种果实成熟期(全树50%果实成熟)鲜果果实30个,用游标卡尺测量果实纵径、横径、果柄;用电子秤(200 g/0.01 g)测定平均单果质量,沿果实缝合线切开,取出果核称量,并按式(1)计算可食率;使用水果硬度计(探头直径6.0 mm)测定果肉硬度,在每个果实表面选3个点测定;使用色差仪在每个果实表面选取3个部位测量色值L*、a*、b*;使用手持折光计测定可溶性固形物含量[14];参照GB/T 12456—2008的方法[15]测定可滴定酸含量;参照曹建康等[16]方法测定相对电导率及总糖、总酚和维生素C含量。

式(1)中,A1果肉质量;A2果实单果质量。

1.4 数据分析

试验数据使用WPS Office、SPSS 25.0软件进行统计分析,果实形态及品质指标结果均采用单因素方差分析(one-way ANOVA)的最小显著差异(leastsignificant difference,LSD)进行差异显著性检验(P<0.05)。

2 结果与分析

2.1 物候期

表1为物候期观测记录表,可以发现,所有供试甜樱桃品种在3月下旬萌动,4月初进入花期,整个花期在6~9 d之间并持续到4月中下旬。秦林果实在所有品种中成熟期最早,在6月1日成熟;黑珍珠成熟期最晚,在6月12日成熟。乌梅极早果实在所有品种中生育期最短,仅需44 d;而布鲁克斯果实生育期最长,长达56 d。所有供试甜樱桃品种的落叶期均在11月中旬。秦林果实的营养生长期在所有品种中最长,黑珍珠果实的营养生长期最短,分别为240 d和229 d。

2.2 树体形态特征与叶片性状

由表2可以看出,供试品种树体类型均为普通型。秦林、鲁玉、瑞德和乌梅极早树体树姿开张;黑珍珠和布鲁克斯树姿半开张;斯帕克里、彩玉和含香树姿直立。斯帕克里、布鲁克斯和彩玉生长势相对较强;秦林和乌梅极早的生长势相对较弱;黑珍珠、鲁玉和含香居中。从枝条皮色看,布鲁克斯1年生枝条皮色为浅褐色,其余品种为褐色。1年生枝条节间长度秦林为短,为2.34 cm,其余供试品种为节间长度居中。

表2 不同品种甜樱桃树体形态特征比较
Table 2 Comparison of tree morphological characteristics of different sweet cherry cultivars

品种Cultivar黑珍珠Heizhenzhu秦林Chelan鲁玉Luyu斯帕克里Sparkle瑞德Glenred布鲁克斯Brooks乌梅极早Cкopocпeлкa彩玉Caiyu含香Hanxiang树体类型Tree type普通型Normal普通型Normal普通型Normal普通型Normal普通型Normal普通型Normal普通型Normal普通型Normal普通型Normal树姿Tree posture开张Open-branching开张Open-branching半开张Semi-open-branching直立Erect开张Open-branching半开张Semi-open-branching开张Open-branching直立Erect半开张Semi-open-branching生长势Growth potential中Medium弱Weak中Medium强Strong中Medium强Strong弱Weak强Strong中Medium 1年生枝条皮色Skin color of annual branches褐色Brown褐色Brown褐色Brown褐色Brown褐色Brown浅褐色Light brown褐色Brown褐色Brown褐色Brown节间长度Internode length/cm 4.38(中Medium)2.34(短Short)3.21(中 Medium)3.64(中 Medium)3.58(中 Medium)4.38(中 Medium)3.44(中 Medium)4.28(中 Medium)3.86(中 Medium)

2.3 叶片性状

由表3可以看出,鲁玉和乌梅极早甜樱桃叶片的春嫩叶色为绿色,其余供试品种为微红色。鲁玉、斯帕克里和乌梅极早三个甜樱桃品种叶片的叶色为绿色,其余供试品种为浓绿色。斯帕克里甜樱桃叶片的叶形为长倒卵圆形,鲁玉和瑞德为长椭圆形,其余供试品种为长卵圆形。布鲁克斯甜樱桃叶片的叶尖形状为渐尖,黑珍珠、鲁玉、斯帕克里和彩玉为急尾尖,其余品种为渐尾尖。斯帕克里、布鲁克斯和乌梅极早甜樱桃叶片的叶基形状为楔形,鲁玉、布鲁克斯和彩玉为广圆形,其余为广楔形。含香甜樱桃叶片的叶缘形状为细重锯齿,秦林、布鲁克斯和乌梅极早为粗重锯齿。乌梅极早甜樱桃叶片的叶背被毛密,秦林和含香中等。含香甜樱桃叶片的叶腺形状为圆形,其余品种均为肾形。叶腺颜色只有彩玉甜樱桃为绿色,黑珍珠、斯帕克里和布鲁克斯为紫红色,其余品种为红色。秦林甜樱桃叶片叶腺数量为2~3个,其余品种均为2个。斯帕克里和乌梅极早叶片的叶腺最小,秦林、鲁玉和彩玉的最大。

表3 不同品种甜樱桃叶片性状比较
Table 3 Comparison of leaf traits among sweet cherry cultivars

品种Cultivar叶尖Tip黑珍珠Heizhenzhu叶背被毛Hairiness at the lower leaf side稀疏Sparse叶腺形状Leaf gland shape肾形Reniform叶腺数量Leaf gland number 2叶腺大小Leaf gland size中Medium秦林Chelan中等Medium肾形Reniform叶腺颜色Leaf gland color紫红Purplish glenred红Glenred 2~3大Big鲁玉Luyu春嫩叶色Spring tender leaf color微红Light glenred微红Light glenred绿Green叶色Leaf color浓绿Dark green浓绿Dark green绿Green稀疏Sparse肾形Reniform红大叶形Leaf shape长卵圆Ovoidlanceolate长卵圆Ovoidlanceolate长椭圆Long ellipsoid长倒卵圆Long obovoid长椭圆Long ellipsoid长卵圆Long ellipsoid长卵圆Long ellipsoid长卵圆Long ellipsoid长卵圆Long ellipsoid急尾尖Acute/caudate渐尾尖Acuminate/caudate急尾尖Acute/caudate急尾尖Acute/caudate渐尾尖Acuminate/caudate渐尖Acuminate叶基Leaf base广楔形Wide wedge广楔形Wide wedge广圆形Wide circular楔形Wedge叶缘Leaf edge钝重锯齿Blunt heavy serration粗重锯齿Coarse heavy serration钝重锯齿Blunt heavy serration钝重锯齿Blunt heavy serration钝重锯齿Blunt heavy serration粗重锯齿Coarse heavy serration粗重锯齿Coarse heavy serration钝重锯齿Blunt heavy serration细重锯齿Fine heavy serration Glenred Big斯帕克里Sparkle绿小微红Light glenred微红Light glenred微红Light glenred绿Green Green稀疏Sparse肾形Reniform Small瑞德Glenred楔形Wedge稀疏Sparse肾形Reniform紫红Purplish glenred红Glenred中Medium布鲁克斯Brooks稀疏Sparse肾形Reniform中Medium乌梅极早Cкopocпeлкa浓绿Dark green浓绿Dark green绿Green广圆形Wide circular楔形Wedge密小渐尾尖Acuminate/caudate急尾尖Acute/caudate渐尾尖Acuminate/caudate Dense肾形Reniform紫红Purplish glenred红Glenred Small彩玉Caiyu稀疏Sparse肾形Reniform绿大微红Light glenred微红Light Glenred浓绿Dark green浓绿Dark green广圆形Wide circular广楔形Wide wedge Green Big含香Hanxiang中等Medium圆形Circular红2222222中Glenred Medium

2.4 果实形态

由表4可以看出,所有调查品种中斯帕克里、瑞德和布鲁克斯甜樱桃果实的果形为肾形,其余品种果形为心脏形。彩玉果实果顶形状为平,其余品种为凹。乌梅极早和含香缝合线为凸,其余品种为平。斯帕克里、布鲁克斯和乌梅极早果实的果皮色泽为红色,黑珍珠和瑞德为紫红色,秦林和含香为黑紫色,鲁玉和彩玉为黄底色红晕。彩玉果实着色程度相对较少,鲁玉较多,其余品种着色程度全面。彩玉果肉颜色为乳白色,秦林、鲁玉和含香为淡红色,黑珍珠、瑞德和布鲁克斯为紫红色。黑珍珠果实与果柄分离程度为相对中等,其余供试品种果与柄难分离。关于果实的风味,秦林、鲁玉、乌梅极早和彩玉品种果实风味酸,其余品种为甜酸。

表4 不同品种甜樱桃果实外观比较
Table 4 Comparison of fruit appearance among sweet cherry cultivars

品种Cultivar黑珍珠Heizhenzhu秦林Chelan鲁玉Luyu斯帕克里Sparkle瑞德Glenred布鲁克斯Brooks乌梅极早Cкopocпeлкa彩玉Caiyu含香Hanxiang果形Fruit shape心脏形Heart-shaped心脏形Heart-shaped心脏形Heart-shaped肾形Reniform肾形Reniform肾形Reniform心脏形Heart-shaped心脏形Heart-shaped心脏形Heart-shaped果顶性状Fruit tip character凹Concave凹Concave凹Concave凹Concave凹Concave凹Concave凹Concave平Flat凹Concave缝合线Sutural line平Flat平Flat平Flat平Flat平Flat平Flat凸Convex平Flat凸Convex果皮色泽Pericarp color紫红Purple red黑紫Black purple黄底色红晕Yellow background red红Red紫红Purple red红Red红Red黄底色红晕Yellow background red黑紫Black purple着色程度Coloring degree全面Fully全面Fully多More全面Fully全面Fully全面Fully全面Fully少Less全面Fully果肉颜色Flesh color紫红Purple red淡红Pale red淡红Pale red淡红Pale red紫红Purple red紫红Purple red红Red乳白Milky white淡红Pale red果与柄分离程度Difficulty in separation of fruit and stalk中Moderation难Difficult难Difficult难Difficult难Difficult难Difficult难Difficult难Difficult难Difficult风味Flavour甜酸Sweet sour酸Sour酸Sour甜酸Sweet sour甜酸Sweet sour甜酸Sweet sour酸Sour酸Sour甜酸Sweet sour

由表5可知,含香果柄最长,斯帕克里、瑞德和布鲁克斯果柄最短显著低于其他品种。含香、彩玉和黑珍珠果形指数最高,瑞德、斯帕克里、布鲁克斯和鲁玉果形指数较低,相对其他果实果肩更宽。含香、鲁玉和布鲁克斯果实的单果质量高于乌梅极早和彩玉。在所有供试品种中,瑞德果实的鲜核质量最重且可食率最低,秦林果实的鲜核质量最轻且可食率最高。

表5 不同品种甜樱桃果实形态指标
Table 5 Comparison of fruit morphology among sweet cherry cultivars

注:同列不同小写字母表示在P<0.05差异显著。下同。
Note:Different small letters in the same column indicate significant difference at P<0.05. The same below.

品种Cultivar黑珍珠Heizhenzhu秦林Chelan鲁玉Luyu斯帕克里Sparkle瑞德Glenred布鲁克斯Brooks乌梅极早Cкopocпeлкa彩玉Caiyu含香Hanxiang果柄长度Shank length/mm 41.17±1.36 ab 36.51±1.16 d 33.91±1.5 cd 24.56±1.39 e 27.87±1.21 e 27.7±1.21 e 38.8±1.68 bc 41.71±1.25 ab 44.47±1.39 a果实纵径Fruit longitudinal diameter/mm 24.80±0.38 bc 25.77±0.70 ab 24.57±0.56 bc 22.78±0.59 d 24.46±0.47 bcd 24.96±0.57 bc 23.91±0.49 cd 25.44±0.78 bc 27.35±0.55 a果实横径Transverse diameter of fruit/mm 26.82 ±0.27 d 29.18 ±0.4 bc 29.91 ±0.63 ab 28.82 ±0.50 bc 31.00 ±0.40 a 30.36 ±0.50 ab 27.19 ±0.61 d 27.77 ±0.53 cd 29.53 ±0.44 ab果形指数Fruit shape index 0.93± 0.01 a 0.88± 0.03 ab 0.81± 0.02 bc 0.79± 0.02 c 0.79±0.02 c 0.81±0.02 bc 0.88±0.02 ab 0.93±0.03 a 0.92±0.03 a单果质量Single fruit mass/g 10.02±0.49 bc 10.21±0.43 bc 10.57±0.41 ab 10.32±0.49 abc 10.39±0.40 abc 11.36±0.46 ab 9.16±0.38 c 9.03±0.39 c 11.63±0.50 a鲜核质量Fresh fruit pit mass/g 0.52±0.01 abc 0.45±0.02 e 0.51±0.02 bcd 0.48±0.02 cde 0.58±0.02 a 0.53±0.02 abc 0.46±0.01 de 0.48±0.02 cde 0.55±0.02 ab可食率/Edible rate%94.72±0.12 de 95.63±0.07 a 95.14±0.09 bc 95.36±0.12 ab 94.43±0.08 e 95.30±0.06 b 94.97±0.07 cd 94.70±0.15 cde 95.30±0.09 b

2.5 果实品质

由图1-A可以看出,彩玉、黑珍珠和含香3个甜樱桃品种果实的果肉和果皮硬度最高,其次是鲁玉和彩玉。由果实色泽可看出,彩玉甜樱桃果实色泽偏亮、偏黄,与其他供试甜樱桃品种的色值差异较大,与感官观察一致,其次是黑珍珠的颜色最偏向红色饱和,秦林、瑞德和含香的红色饱和度相对最低(图1-B)。

图1 9个甜樱桃品种果实品质指标
Fig. 1 Fruit quality indexes of nine sweet cherry cultivars

由图1-C可以看出,9个供试甜樱桃品种中,大部分品种果实内的可溶性固形物含量(w,后同)都在10%以上,其中布鲁克斯、瑞德和含香的可溶性固形物含量最高。各个品种间的可滴定酸含量存在显著差异,瑞德的可滴定酸含量最高,斯帕克里最低,彩玉和布鲁克斯的可滴定酸含量较为接近,鲁玉、黑珍珠、乌梅极早和含香的可滴定酸含量比较接近。各供试品种的相对电导率差异显著,斯帕克里、布鲁克林、瑞德和乌梅极早的相对电导率相对较高,黑珍珠、彩玉和含香的相对电导率较低。

由图1-D~F可以看出,9个供试甜樱桃品种中,瑞德、含香和秦林的总糖含量最高,同时这三个品种也含有较高的酚类物质;此外乌梅极早甜樱桃的总糖含量最低,但总酚含量最高。彩玉维生素C含量最高,含香次之,布鲁克林最低。综合来看,瑞德和含香的总糖、总酚和维生素C含量都比较丰富。

3 讨 论

天水地区自然资源优势突出,所产甜樱桃品质佳、效益高,深受国内客商和消费者青睐。甜樱桃产业是天水市近年来培育和发展起来的新型特色果品产业之一,天水市甜樱桃种植面积和产量都位居全省第一,在促进农业产业结构转型升级和推动农村经济发展等方面起到了积极的作用[17]。影响果树生长、果实产量和品质的因素很多,如气候及生长环境、自然灾害、虫害防治等[18-19]。试验观察结果显示,在天水地区,9个供试甜樱桃品种中布鲁克斯花芽萌动较早,斯帕克里花芽萌动最晚;黑珍珠盛花期最晚;瑞德与乌梅极早、鲁玉与含香果实成熟期相同,黑珍珠成熟期最晚。9个供试品种均为早、中熟品种,成熟期在6月上旬;所有品种均在11月中旬进入落叶期,这与天水市气候早霜的发生有关。

9个供试甜樱桃品种的树体、果实形态特征、叶片性状、外观品质、功能营养成分含量、果形指数和单果质量均存在差异,并且各具特色。大部分甜樱桃品种树姿表现为开张或半开张生长习性。9个供试品种中斯帕克里、布鲁克斯和彩玉具有较强的生长势。在果园管理时可根据树体生长势和枝条开张角度的不同调整管理方式。品种生长势弱,枝条开张,应加强水肥管理,修剪时注意保留强旺枝,轻剪。品种生长势强,枝条开张角度直立或半开张,在修剪时要及时疏除竞争枝、旺枝,留弱枝,水肥管理适当,避免引起徒长、旺长。从商业角度来看,水果的外观和果肉颜色是重要的特征,甜樱桃的外观品质对其经济价值有很大的影响[20]。9个供试甜樱桃品种中大多数甜樱桃品种的果形呈心脏形,果皮颜色以红色居多,紫红色次之。而彩玉果皮色泽呈黄底色带红晕,果肉乳白,是为数不多的黄色甜樱桃品种。除了外观品质外,口感脆甜也是大多数消费者喜欢的品质。甜樱桃品种的果肉硬度越高口感越脆也越耐贮运,甜樱桃品种含香和黑珍珠果皮硬度和果肉硬度最高,同时果形指数也较高,具有较好卖相的同时也非常适合进行远距离运输销售。黑珍珠果实与果柄分离程度相对较弱,这种现象是否与该品种特性有关还需进一步观察。糖类物质不仅影响果实的风味和品质,并且作为一种信号因子,在果实发育和成熟软化过程中起重要作用[21-22]。甜樱桃不同品种果实成熟后果实色泽差异显著,在生产上不同品种的果实成熟度可通过其果实色泽来判断是否可进行采摘,也可在自动选果机上根据选用品种的果实色泽数据来进行准确的数值调整应用。甜樱桃果实富含维生素C、酚类物质及花青素等生物活性成分,它们能够清除氧自由基,保护细胞免受氧化损伤[23],是果实重要的营养成分,其含量高的品种,具有潜在的商品价值和加工价值。天水市地形复杂,小气候环境多样。种植者应根据果园管理水平、地理气候环境、水肥条件以及销售目标客户,针对果实色泽、风味、营养成分、贮藏性、上市时间等,选择适合自身条件和市场预期的品种进行种植。

4 结 论

在天水市海拔1200 m左右的浅山种植情况下,秦林、斯帕克里、瑞德、布鲁克斯和含香果实个大、色美、酸甜可口、可食率高、果实营养品质良好,具有潜在的经济价值。鲁玉的引种表现较好,在考虑市场黄色品种较少的情况下可适当发展。黑珍珠、乌梅极早和彩玉果实品质较其他供试品种相对电导率低、果个小、口感酸、果肉硬度低等,在天水地区果实综合表现一般,但根据果实品质特点与不同市场及消费需求,可作为授粉、加工品种适量发展。

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Comprehensive evaluation of biological characteristics and fruit traits in early and mid-ripening sweet cherry varieties

CHENG Liang1, HUANG Taishan2, ZHAO Yaqi2, ZHANG Wenyuan2, DENG Jianjun2*

(1Tianshui Institute of Pomology, Tianshui 741000, Gansu, China; 2State Key Laboratory of Vegetable Biobreeding/Institute of Vegetable and Flower/Chinese Academy of Agricultural Sciences, Beijing 100081, China)

Abstract:【Objective】 Sweet cherry (Prunus avium L.) is a popular fruit tree known for its unique flavor and rich nutrition. However, with the development of logistics cold chain transportation and the rise of e-commerce, the sales of sweet cherries have expanded to all parts of the country. The existing main varieties can no longer meet the needs of the national market development. The market demand is shifting towards bright fruit color, high hardness, excellent flavor, high quality, and storage and transportation resistance. Tianshui area has unique natural environmental conditions suitable for planting sweet cherry. In this study, the growth characteristics and quality features of different cultivars planted in this area were investigated in order to screen the excellent sweet cherry cultivars suitable for local planting.【Methods】 Under the same planting management mode, the phenology of 8-year-old and early- or midseason sweet cherry trees of Heizhenzhu, Chelan, Luyu, Sparkle, Glenred, Brooks, Cкopocпeлкa, Caiyu and Hanxiang growin Tianshui area were investigated. Periods of budding, the beginning of flowering, full bloom, the end of flowering, fruit ripening and defoliation were recorded according to the Specification and Data Standards for Cherry Germplasm Resources Description. Leaf morphological characteristics including color, shape, tip, base, edge, hairiness on lower side, and gland shape, color, number and size were also observed. Fruit flesh firmness was measured using a fruit hardness tester (probe diameter:6.0 mm), while peel firmness was determined using a texture analyzer at three points on each fruit surface. A colorimeter was used to measure the L*, a*, and b*values at three locations on each fruit surface. A handheld refractometer was employed to determine the soluble solids content. The titratable acid content was measured following the method in GB/T 12456—2008. The membrane leakage or relative electrical conductivity, total sugar, total phenol, and vitamin C contents of each sweet cherry cultivar were also determined. 【Results】 Morphological characteristics, biological features, appearance quality, functional nutrient content, fruit shape index and single fruit quality varied among cultivars.The tree types of the test cultivars were all common, and the tree bodies of Chelan, Luyu, Glenred and Cкopocпeлкa were open, and Heizhenzhu and Brooks were semi-open, while Sparkle, Caiyu and Hanxiang were upright. Sparkle, Brooks, and Caiyu had relatively stronger growth potential; Chelan and Cкopocпeлкa had relatively weaker growth potential. The skin color of the branches of Brooks was light brown, and that of the rest was brown. The leaf color of most sweet cherry cultivars was rich green, and the color and shape of the leaf glands was red and reniform, respectively. However, Caiyu had green leaf glands and Hanxiang had circular leaf glands. The fruit shape of Sparkle, Glenred and Brooks was reniform, while that of the rest cultivars was heart-shaped. Brooks and Hanxiang had the highest single-fruit weight; Glenred had the heaviest pit weight and lowest flesh recovery, while Chelan had the lightest pit weight and highest flesh recovery. The sweet cherries were all brightly colored. The peel color of Heizhenzhu and Glenred was purple red; that of Chelan and Hanxiang black purple; Luyu and Caiyu had a yellow background with a reddish hue; and the others were red. In contrast to the red flesh of most cultivars, Caiyu had a milky white flesh color. All the cultivars were sour-sweet and tasty and rich in nutrients. Glenred and Hanxiang had the highest titratable acid and total sugar and relatively high soluble solids; Cкopocпeлкa and Hanxiang had the highest phenolic and vitamin C contents;Brooklyn had the lowest vitamin C content; and Cкopocпeлкa had very low total sugar and soluble solids. 【Conclusion】 There are differences in tree and fruit morphological characteristics, leaf traits, appearance quality, functional nutrient content, fruit shape index, and single fruit quality among the 9 tested sweet cherry varieties. In the shallow mountains of Tianshui area about 1200 m above sea level,Chelan, Sparkle, Glenred, Brooks and Hanxiang with large fruit, beautiful color, delicious taste, high flesh recovery, and good nutritional quality, have a great potential economic value and are suitable for the development of planting. Among the yellow varieties, Luyu has a better overall performance and can be developed appropriately in areas with few yellow varieties in the market. Although Caiyu is more distinctive, with its yellow skin and milky white flesh, its overall performance is average in Tianshui area. Like Heizhenzhu and Cкopocпeлкa, it is not recommended for large scale planting.

Key words:Sweet cherry; Introduction performance; Quality characteristics; Fruit nutrition; Tianshui area

中图分类号:S662.5

文献标志码:A

文章编号:1009-9980(2025)12-2865-09

DOI:10.13925/j.cnki.gsxb.20250186

收稿日期:2025-04-07

接受日期:2025-05-21

基金项目:甘肃省现代农业科技支撑体系区域创新中心重点科技项目(2022GAAS03);甘肃省技术创新引导计划项目(23CXNE0021);天水市科技支撑计划项目(TS-STK-2024A-241)

作者简介:程亮,男,副研究员,研究方向为果树栽培与种质资源利用。E-mail:276339627@qq.com

*通信作者Author for correspondence. E-mail:dengjianjun@caas.cn