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‘东试早柚’是实生选育出的柚品种，在云南省热带地区种植，具有早熟、丰产、无籽等优点，然而其来源至今尚未厘清，在品种权意识淡薄的栽培地区产生了许多经济纠纷。因此，解析‘东试早柚’的遗传来源对保护和利用该品种均具有重要意义。以西双版纳‘东试早柚’及其相近品种‘沙田柚’‘水晶柚’为材料，利用分子标记和生物信息等手段探究了3个品种的遗传背景差异。结果显示，‘东试早柚’与‘水晶柚’间杂交不亲和，而与‘沙田柚’杂交亲和；‘东试早柚’和‘水晶柚’的自交不亲和S位点基因型均为S5S6，而‘沙田柚’为S1S2；‘东试早柚’和‘水晶柚’全基因组SNP密度分布高度相似，SNP聚类分析将‘东试早柚’和‘水晶柚’聚为一类，而与‘沙田柚’显著区分。此外，2对InDel多态性标记也可明显区分‘东试早柚’与‘沙田柚’。因此，本研究结果认为‘东试早柚’与‘水晶柚’遗传背景更为相近，而与‘沙田柚’遗传距离较远、相差很大。 相似文献
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在果品中柑桔果品是公认的维生素C含量较多的一类水果,其中又以柚类果品含量最盛.但不同抽类品种.品系的维生维C含量,相同柚类品种、品系产于不同地区的维生素C含量,柚类不同品种、品系与甜橙、宽皮柑桔、柠檬、金柑维生素C含量有何差异,笔者对上述问题作了一些研究,并初步取得一些结果 相似文献
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柚原产于我国和东南亚 ,在我国已有四千多年的栽培历史。我国有丰富的柚类资源 ,但在利用柚类资源育种方面却起步较晚 ,工作比较薄弱。国内目前报道的仅有 :沙田柚×菊花芯柚育出沙菊柚 ,金兰柚×沙田柚育出金沙柚 (原名金沙柚 6号 )和文林柚 (原名金沙柚 1号 )两个新品种 (系 )。沙田柚为广西重点发展的名特优果树品种 ,具有肉脆蜜甜 ,极耐贮运等特点 ,但种子太多 ,果汁较少 ,竞争力日趋下降。四川金堂无核柚果大皮薄 ,汁多无核 ,易剥离 ,但偏酸。根据柑桔性状遗传规律及亲本选配原则 ,试验用沙田柚、金堂无核柚等作亲本进行 3个组合杂交 ,… 相似文献
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为比较桂柚1号(Citrus grandis‘Guiyou No.1’)与沙田柚(C.grandis‘Shatianyou’)常温贮藏条件下的腐烂率及主要品质指标的差异，2016—2020年开展了套袋常温贮藏和浸药+套袋常温贮藏试验。结果表明，套袋常温贮藏时，桂柚1号的腐烂率显著大于沙田柚；浸药+套袋常温贮藏时，沙田柚的腐烂率在多数时间显著大于桂柚1号。套袋常温贮藏180 d,沙田柚和桂柚1号的可溶性固形物先升后降，总体略有上升，沙田柚的可溶性固形物含量提高速度较快，持续时间较短，下降较早；桂柚1号的可溶性固形物含量提高速度较慢，持续时间比沙田柚长近2个月，开始下降时间迟近2个月。总糖含量基本上呈持续下降趋势，沙田柚降糖快、降幅大，桂柚1号降糖慢、降幅小。可滴定酸含量总体趋势为下降，桂柚1号的可滴定酸含量下降时间比沙田柚迟近2个月，且波动幅度与总体降幅较小。沙田柚和桂柚1号的维生素C含量分别下降32.79%和30.69%,沙田柚的维生素C含量在多数时间低于桂柚1号。沙田柚和桂柚1号的固酸比分别上升110.89%和50.00%,沙田柚的固酸比在多数时间高于桂柚1号。桂柚1号果实的贮藏品质... 相似文献
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对28个柚品种(系)果实室温条件耐贮性的研究表明,不同柚品种(系)或类型耐贮性差异较大,其中以沙田柚类、四季抛等耐贮性较强,安江红心柚、安江石榴柚、五布柚等耐贮性较差. 相似文献
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部分柚类品种数值分类研究 总被引：8，自引：0，他引：8
利用NTSYS软件对柚类33个品种65个形态学性状进行了品种Q型聚类及其性状R型聚类,采用Mantel相关性检测优化出29个性状为核心性状。结果表明,29个性状对33个柚类品种的聚类,可分成6个组群;29个性状聚类也可分成6组。主成分分析,前9个主成分累积贡献率达75%,根据前9个主成分与性状间的相关性,选出影响力较大18个性状,综合了柚类特有的果实因子、花器官因子、枝条因子、叶片因子,说明这些因子是柚类品种重要特征。试验结果将有利于今后更好地利用形态学指标评定柚类品种及根据分类结果更好地利用这些丰富育种材料的遗传背景。 相似文献
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花粉直感对京白梨品质的影响 总被引：23，自引：3，他引：23
为研究京白梨生产中花粉直感与所出现的品质退化现象的关系,试验选用11个梨品种为授粉品种,以生长势健壮、结果盛期的京白梨为母本进行人工授粉,测定了不同授粉组合的坐果率、成熟种子数、果实外在品质及内在品质等几个主要指标。结果表明:京白梨果实在坐果率、成熟种子数、单果重、可滴定酸、可溶性固形物等方面表现明显的花粉直感现象,而在果形指数、可食用部分表现不明显。成熟种子数与可滴定酸显著相关,表明花粉可通过种子对果实品质产生一定影响。京白梨最适宜的授粉品种是白梨系统的鸭梨、金水2号、中梨2号和七月酥。 相似文献
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在‘沙田柚’成熟前期进行地膜(反光地膜、防水透气地膜、透明塑料地膜)覆盖处理,分析不同覆盖材料处理对其果实品质和果园土壤细菌类型、理化性质的影响。结果表明:反光地膜和防水透气地膜覆盖处理可提高‘沙田柚’果实蔗糖、葡萄糖、果糖、可溶性固形物、柠檬酸含量,降低苹果酸、抗坏血酸含量,透明塑料地膜处理的各指标与对照均无显著差异。采用高通量测序法对土壤细菌进行测序,获得OTUs总数目为21393个,至少涵盖了38门48纲109目205科428属278种的细菌;在细菌门分类水平,变形菌门和放线菌门是各处理的优势菌门,地膜覆盖提高了放线菌门、蓝藻门的相对丰度,降低了厚壁菌门的相对丰度。对土壤理化性质分析发现,透明塑料地膜和防水透气地膜处理提高了土壤含水量,反光地膜和防水透气地膜处理降低了土壤有机质、无机磷、有效钾含量。综上,果实成熟前覆盖反光地膜和防水透气地膜可以改善‘沙田柚’的果实品质;地膜覆盖处理改变了‘沙田柚’园土壤细菌多样性、群落结构和土壤的理化性质,地膜覆盖具有改善‘沙田柚’果实品质和土壤的应用潜力。 相似文献
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In this study, average weight, colour, soluble solids content and titratable acidity were determined as quality parameters of strawberry fruits while ascorbic acid, total anthocyanins, total phenolics, total flavonoids, minerals and trace elements content as nutritional parameters. All these attributes along with the DPPH radical scavenging activity were screened in two strawberry genotypes grown on the same site at the ripe stage. Also, the phenolic profiles of the strawberry fruits were obtained by HPLC. Except colour, results showed no significant differences between cultivars in quality parameters. Ascorbic acid found for ‘Premial’ cv. (81.62?mg/100?g) was twice the amount found in ‘Magic’ cv. (42.15?mg/100?g), total phenolics varied from 207.95 (cv. ‘Premial’) to 249.98 (cv. ‘Magic’) mg GAE/100?g while total flavonoid content in fruits of ‘Magic’ cultivar (79.56?mg/100?g) was 2?fold higher than the one of the ‘Premial’ cv. The quercetin content ranged from 2.72 to 4.66?mg/100?g, whereas free ellagic acid ranged from 6.79 to 9.03?mg/100?g. The pale shiny fruits of ‘Premial’ cv. (higher L*, ho and chroma index) had a lower total anthocyanin content (19.07?mg CG/100?g) than the bluish fruits of the ‘Magic’ cv. (23.96?mg CG/100?g). An inverse relationship between the levels of ascorbic acid and anthocyanin contents was also noticed in strawberry samples. Significant differences were found also in minerals and trace elements content of the two strawberry cultivars. The results revealed the importance of genetic background for the content of antioxidant compounds in strawberry fruits. 相似文献
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3个杨桃品种的果实香气成分分析 总被引：5，自引：2，他引：3
采用顶空固相微萃取取法(HS-SPME),用气相色谱-质谱联用(GC-MS)技术分析了3个杨桃品种成熟果实的香气成分。结果表明,杨桃果实中的香气成分主要是乙酸-反-2-己烯酯、4,6,8-大柱三烯、β-紫罗兰酮、丁酸-反-2-己烯酯。此外还含有一些少量的1-壬醇、己酸-2-己烯酯、丙酸-反-2-己烯酯、丁酸-反-3-己烯酯、戊酸-反-2-己烯酯、茶螺烷、香叶基丙酮、苯甲酸甲酯、苯甲酸乙酯和乙酸辛酯等。不同品种的杨桃果实中的所含的香气成分及含量不同,B17杨桃含乙酸-反-2-己烯酯、丁酸-反-2-己烯酯、丁酸-反-3-己烯酯等青香型酯类最低而含β-紫罗兰酮、1-壬醇、乙酸辛酯苯甲酸甲酯、苯甲酸乙酯、茶螺烷等花香型、果香型及木香型成分最高,因而其香气品质要优于B10和新加坡红肉种。 相似文献
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Pink or red-fleshed fruit mutations are commonly found in grapefruit, sweet orange, and occasionally in lemon, which combine novel appearance with fine eating quality. In order to identify the major coloured pigments, high performance liquid chromatography (HPLC) with ultraviolet detection was applied for the separation and characterization of carotenoids from five pink or red-fleshed citrus cultivars. As a result, both lycopene and β-carotene with similar HPLC profiles were detected in the five citrus cultivars, ‘Fengdu’ red-fleshed pomelo (Citrus grandis (L.) Osbeck), ‘Guanxi’ sweet pomelo red mutant, ‘Hirado Buntan’ pomelo, ‘Cara Cara Navel’ orange (C. sinensis (L.) Osbeck) and ‘Star Ruby’ grapefruit (C. paradisi Macf.). ‘Star Ruby’ contained the highest lycopene and β-carotene content in its flesh. However, although the significant correlation between the concentrations of lycopene and β-carotene was detected with a coefficient of 0.9692 (P < 0.01), ratios of lycopene/β-carotene were different among the cultivars. Post-harvest biosynthesis verified that the flesh itself synthesized carotenoids rather than acquiring them via transport from other tissues. In addition, a product feedback regulation mechanism might be involved in the process of carotenoid biosynthesis. 相似文献
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ABSTRACT: Recent progress in cassava transformation has allowed the robust production of transgenic cassava even under suboptimal plant tissue culture conditions. The transformation protocol has so far been used mostly for the cassava model cultivar 60444 because of its good regeneration capacity of embryogenic tissues. However, for deployment and adoption of transgenic cassava in the field it is important to develop robust transformation methods for farmer- and industry-preferred landraces and cultivars. Because dynamics of multiplication and regeneration of embryogenic tissues differ between cassava genotypes, it was necessary to adapt the efficient cv. 60444 transformation protocol to genotypes that are more recalcitrant to transformation. Here we demonstrate that an improved cassava transformation protocol for cv. 60444 could be successfully modified for production of transgenic farmer-preferred cassava landraces. The modified transformation method reports on procedures for optimization and is likely transferable to other cassava genotypes reportedly recalcitrant to transformation provided production of high quality FEC. Because the three farmer-preferred cassava landraces selected in this study have been identified as resistant or tolerant to cassava mosaic disease (CMD), the adapted protocol will be essential to mobilize improved traits into cassava genotypes suitable for regions where CMD limits production. 相似文献
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奥兰柚是由二倍体无酸柚和四倍体白子葡萄柚杂交获得的三倍体柚品种,广东省农科院果树研究所于1996年从以色列引进,先后在广州、阳山、梅州等地进行种植试验。表现出树形开张,树势壮旺,适应性较强,丰产性较好;成熟期特早,8月下旬至9月上旬成熟;平均单果重489.3g,果形扁平或圆形,端正,果皮绿色,有光泽;果实无子,果肉柔嫩,汁多,化渣,风味良好;可溶性固形物含量11.5%,总糖含量8.26%,可滴定酸含量0.55%,维生素C含量49.2mg/100g,固酸比高。 相似文献