共查询到20条相似文献，搜索用时 613 毫秒
1.
2.
日本柑桔都以枳为砧木,认为枳砧柑桔具有耐寒、矮化、果实品质好等优点。枳砧对脚腐病、衰退病具有抗性,而易感裂皮病。日本栽培的多数品种与枳的亲和性良好,但已知一些柑桔品种、品系与枳砧发生嫁接障碍。 相似文献
3.
柑桔砧木枳橙及其育苗技术 总被引：2，自引：0，他引：2
隆旺夫 《柑桔与亚热带果树信息》2004,20(10):37-37
枳橙系枳与橙的杂种。以枳橙为砧嫁接的柑桔苗木生长快，植株健壮，定植后的柑桔树主根粗，根系发达，耐旱，较耐寒，抗衰退病、脚腐病和线虫病等。树体生长快，树势壮，结果早，丰产优质。鉴于枳(目前使用最广泛的砧木品种)冬季落叶，有一定的休眠期，以枳为砧嫁接的柑桔树冬季有叶片黄化、异常落叶、易早衰等现象，枳橙作为柑桔砧木品种在柑桔育苗上开始受到重视，特别是在柑桔大棚采穗圃中常用枳橙做砧。 相似文献
4.
枳橙系枳与橙的杂种。以枳橙为砧嫁接的柑桔苗木，定植后主根粗．根系发达．耐旱，较耐寒，抗衰退病、脚腐病和线虫病等。植株生长快，树势壮，结果早，丰产优质。鉴于枳（目前使用最为广泛的砧木品种）为砧嫁接的柑桔树，冬季有叶片黄化、异常落叶、易早衰等现象，枳橙作为柑桔砧木品种在柑桔育苗上开始受到重视。特别是在柑桔品种大棚采穗圃中常用枳橙作砧． 相似文献
5.
本试验采用实生苗根系接种的方法,测定了10个枳品系和6个枳杂种对脚腐病(供试病原为phytophthora nicotianae B.de Haan var.parasitica(Dast.)Waterh)抗性的差异,以期筛选出最抗病或最耐病的品系。供试的枳品系是:鲁比杜克斯枳、Srirampur枳、Ponceroy枳、Rich枳、Chethalli枳、Towne枳、Pomeroy枳、大花枳、Christensen枳;枳杂种是:Srirampur特洛亚枳橙、施文格枳柚、Srirampur 相似文献
6.
7.
8.
一些枳杂种耐盐性的遗传评价 总被引：5，自引：0，他引：5
柑桔是对盐害极敏感的果树,低浓度的ＮａＣｌ(氯化钠)就会引起明显的生理伤害。其中引起柑桔伤害的主要是Ｃｌ-,Ｎａ+的作用是很有限的。不同的柑桔品种和砧木在耐盐性方面存在着显著差异,因此,筛选高耐盐的材料作为砧木对盐碱地区的柑桔生产有着及其重要的意义。许多实验都证实柑桔属中的兰卜来檬和印度酸桔是最耐盐的品种,宽皮柑桔的多数品种比较耐盐,酸橙次之,而甜橙、枳、枳橙等受ＮａＣｌ的危害最严重。枳在我国是一种重要的柑桔砧木,有许多优良的园艺性状,主要表现在耐寒、矮化、抗衰退病和脚腐病及早结丰产,但是枳对盐害极敏感,限制… 相似文献
9.
枳原产我国,是柑桔的主要砧木。由于它作宽皮柑估、甜橙、金柑等的砧木具有早结、丰产、优质、抗寒、耐瘠薄、抗脚腐病等众多优良特性,国内外研究比较广泛,现已从中选出不少优良类型。 相似文献
10.
11.
柑橘溃疡病抗性相关的SSR标记筛选 总被引：3，自引：0，他引：3
以抗柑橘溃疡病的‘宜昌橙2586’与易感病的‘岭南沙田柚’进行杂交,随机选取F1 代材料80 株,开展溃疡病抗性田间接种鉴定。鉴定结果表明,溃疡病抗性在F1 代分离明显,若将免疫和高抗类型均视为抗病,中抗、中感和感病类型均视为感病,则抗感的分离比例接近1︰1。采用集合分离分析法BSA (Bulked Segregant Analysis),结合SSR 分子标记技术,筛选到1 个与柑橘溃疡病抗性相关的分子标记CCR-110。利用F1 代分离个体和公认的抗感材料对标记进行验证分析,发现该标记表现较好的抗性相关性。F1 群体相关分析表明,该标记与柑橘溃疡病抗性的相关系数为0.79;采用最大似然法计算重组率为9.38%±3.5%,通过 Kosambi 函数将其转换成图距单位（cM）,遗传距离为9.11 cM;感病的甜橙类、柚类、枳类没有此标记,抗病的金柑类、宜昌橙类、香橙类、宽皮柑橘类的多数材料出现此标记。 相似文献
12.
Alternaria alternata, the causal agent of Alternaria brown spot (ABS), causes necrosis on leaves, twigs, and fruit, reducing the productivity and quality of fruits. Tangerines and their hybrids are highly susceptible to the disease. Species, hybrids, and cultivars of Citrus from the germplasm bank of the Estação Experimental de Citricultura de Bebedouro, São Paulo, Brazil, were evaluated in 2004 and 2005 with respect to their resistance to A. alternata, both through natural infection and by inoculation. Detached leaves were also used to demonstrate susceptibility or resistance to the disease. Ten cultivars of Satsumas (Citrus unshiu), and 14 cultivars of Clementine mandarin (C. clementina) did not show any symptoms of the disease in their leaves, either through natural infection or when inoculated in the field. The Burguess SRA-412, Wallent SRA-438, Carvalhais, Ampefy SRA-459, Ananas SRA, and Macaque SRA-426 mandarin hybrids (C. reticulata) did not show symptoms of the disease under natural or artificial infection in the field. Some cultivars of C. deliciosa, C. tangerina, C. erythrosa, and C. temple showed symptoms of the disease, even though no previous record of their susceptibility to Alternaria brown spot had been previously reported. The hybrids Fairchild, Nova, Page, Fortune, and Sunburst were susceptible to the disease. However, Fremont mandarin (a crossing between C. clementina and C. reticulata), Encore (C. nobilis × C. deliciosa), and Fallglo (C. reticulata × C. paradisi) did not show symptoms in field, and few symptoms were verified in detached leaves. These materials are promising for the cultivation of tangerines, and will enable genetic improvement for the development of cultivars resistant to Alternaria brown spot. 相似文献
13.
14.
梨种质资源对腐烂病抗性的室内评价 总被引：1，自引：0，他引：1
采用离体枝条分生孢子悬浮液和菌丝块接种测定了11 种梨种质资源共211 份材料对腐烂病的抗性。结果显示：不同种质资源对病菌的侵入和扩展的抵抗均存在差异,抗侵入的占17.5%,抗扩展的占35.1%;同一种质资源对病菌侵入与扩展的抵抗之间也有差异,对病菌侵入和扩展抵抗一致的占30.3%,不一致的占69.7%;所有供试材料中对病菌侵入和扩展均为高抗（HR/HR）的占1.4%,抗病（R/R）的占4.7%,中等（M/M）的占12.3%,感病（S/S）的占10.9%,高感（HS/HS）的占0.9%;通过综合抗性评价发现,‘大香水’、‘杜梨’、‘江岛’、‘康德’、‘龙泉酥’、‘苹果梨’、‘山梨’、‘云红1 号’、‘早玉’和‘长十郎’为抗病（R/R）材料,‘新高’、‘武豆9 号’和‘荆杜3 号’为高抗（HR/HR）材料,‘新星’和‘新黄’为高感（HS/HS）材料。 相似文献
15.
16.
利用国外种质资源创造的20 份高世代马铃薯无性系为试材，以尤金为感病对照，克新18 号为抗病对照，采用自然
病圃和人工接种的鉴定方式进行疮痂病抗性评价，利用SSR 分子标记分析试材之间的亲缘关系，并对比SSR 遗传相似性系
数聚类结果和试材抗病性分类结果，探究利用SSR 分子标记辅助筛选疮痂病抗病资源的可行性。从试验地土壤和感病块茎
共分离纯化具有链霉菌特征的菌株278 份，其中240 份来自于块茎，38 份来自于土壤。具有致病力的菌株127 株，经鉴定
全部属于Streptomyces scabies 菌种。试材间的抗病性存在明显差异，可分为高抗、中抗、中感和高感4 个类型。人工接种与
自然病圃抗性鉴定结果存在极显著相关（R2=0.946 7）。抗病类型与感病类型通过SSR 遗传相似性系数聚类大致可以区分。 相似文献
17.
18.
35 个草坪草品种对禾谷缢管蚜抗性的研究 总被引：2，自引：0，他引：2
研究了禾本科7 个属35 个草坪草品种对禾谷缢管蚜〔Rhopalosiphum padi (L. ) 〕的抗性, 鉴定出高抗品种15 个, 中抗品种3 个, 低抗品种2 个。匍匐翦股颖( Agrostis stolonifera L. ) 和野牛草〔Buchloe dactyloides (Nutt. ) Engelm. 〕抗性最好, 均为免疫级。其次是狗牙根〔Cynodon dactylon (L. ) Pers. 〕, 6 份材料中, 有4 份属于免疫级。高羊茅( Festuca arundinacea Schreb. ) 在免疫至低抗间变化, 草地早熟禾( Poa pratensis L. ) 在高抗至中感间变化。结缕草( Zoysia japonica Steud. ) 为低感、中感水平。多年生黑麦草(Lolium perenne L. ) 抗性最差, 10 份材料均为高感。症状分析、虫口数量与受害程度关系分析初步表明,草坪草对禾谷缢管蚜的抗性包括抗生性和耐害性。 相似文献
19.
以纽荷尔脐橙和四季橘为试验材料,基于溃疡病菌诱导的柑橘转录组数据库,利用PCR方法克隆获得4个WRKY家族基因Cs WRKY22、Cs WRKY50、CsWRKY72-1和CsWRKY72-2的cDNA全长序列。序列分析结果表明,这4个基因的cDNA全长分别为1 123、1 312、1 809和2 208 bp,开放阅读框长度分别为921、480、1 809和1 767 bp,各编码306、159、602和588个氨基酸。氨基酸序列和结构分析显示,这4个基因属于第Ⅱ类WRKY蛋白。进化树分析显示,所克隆的4个柑橘WRKY蛋白与可可、葡萄等WRKY蛋白亲缘关系较近。亚细胞定位显示,所克隆的4个WRKY基因定位于细胞核,与亚细胞定位预测相符。对纽荷尔脐橙和四季橘中4个基因受溃疡病菌诱导的表达分析表明,CsWRKY22参与寄主的感病反应,而CsWRKY50参与抗溃疡病的免疫应答反应。柑橘溃疡病菌能抑制CsWRKY72-1和CsWRKY72-2介导的寄主基础免疫。水杨酸(SA)和茉莉酸甲酯(MeJA)处理表明,4个Cs WRKY基因均不参与SA和MeJA介导的寄主抗病和抗逆反应。 相似文献
20.
Growth,root morphology and boron uptake by citrus rootstock seedlings differing in boron-deficiency responses 总被引：1，自引：0，他引：1
Boron (B) is an essential microelement for higher plants and has important physiological functions in plant growth and development. Citrus plants are frequently exposed to B-deficiency, but knowledge regarding the effects of B-deficiency on rootstock growth, root morphology and genotypic variations in citrus is limited. To evaluate the variations in plant-growth parameters in response to B-deficiency, five citrus rootstocks seedlings that grown in modified 1/2-strength Hoagland's solution that contained 0.25 μM H3BO3 (moderate B-level, Control) or 0 μM H3BO3 (B-deficiency, −B) were investigated before and 90 days after treatment. There are significant genotypic variations in plant-growth parameters (dry mass, leaf area and seedling height), root-morphological traits and B-concentrations. B-deficiency inhibited plant dry mass and leaf area expansion of Fragrant citrus, Sour orange and Trifoliate orange seedlings significantly (P < 0.05), whereas no effect was found on the total dry mass of Carrizo citrange and Red tangerine seedlings. Further, B-deficiency reduced the root number, root length and root surface area in Fragrant citrus and Trifoliate orange significantly (P < 0.05); however, no significant effect was detected on these root morphological traits of Carrizo citrange and Red tangerine (P > 0.05). In addition, B-deficiency reduced the B-concentration in the leaves of all the five genotypes and the B-concentration in the roots of Fragrant citrus and Sour orange, none effect was observed on the B-concentration in stems of all studied genotypes and roots. However, there were significant relationships between the root-morphological traits and B-uptake efficiency. These results showed that Carrizo citrange and Red tangerine are B-efficient, Trifoliate orange is the moderate B-efficient genotypic rootstocks, whereas Fragrant citrus and Sour orange are B-inefficient genotypic rootstocks. In addition, Trifoliate orange was the moderate B-efficient rootstocks of five genotypes. The root-to-shoot dry mass ratio (R/S) and longer root numbers were higher in the Carrizo citrange and Red tangerine than that of Trifoliate orange, Fragrant citrus and Sour orange genotypes. That is to say, maintaining higher R/S and numerous longer lateral roots is very important in improving the B-efficiency and thus contribute much to the resistance of seedlings to B-deficiency in the Carrizo citrange and Red tangerine genotypes. 相似文献