排序方式： 共有7条查询结果，搜索用时 15 毫秒
1
1.
Pakull Birte Eusemann Pascal Wojacki Janine Ahnert Diana Liesebach Heike 《European Journal of Forest Research》2021,140(6):1543-1557
European Journal of Forest Research - In Germany, Douglas fir (Pseudotsuga menziesii Franco) is seen as a valuable species for future cultivation in times of climate change. Local seed production... 相似文献
2.
Quintino Araujo Dario Ahnert Guilherme Loureiro José Faria Cinira Fernandes Virupax Baligar 《Archives of Agronomy and Soil Science》2018,64(13):1892-1909
The soil quality index (SQI) for cacao cropping systems was developed to meet the nutritional criteria of the crop, the environmental safety of the cropping sites and the increasing demand for the production and quality of cocoa. Available water function (AWF), root growth function (RGF), mineral nutrition of plants function (MNF) and environmental safety function (ESF) for potentially toxic elements were included in the additive model of SQI for cacao cropping systems. In this study, over 66% of the cacao fields cropping sites were classified as regular SQI with a range of scores between 0.42 and 0.61. The field cropping site with the highest score (0.73) characterized as typic Alitic Red-Yellow Argisol was rated with high SQI. In contrast, the field cropping sites characterized as abrupt Cohesive Dystrophic Red-Yellow Argisol (0.29), typic Dystrophic Haplic Cambisol (0.39), and latosolic Dystrophic Yellow Argisol (0.40) were rated with low SQI. MNF and AWF were the functions that most contributed to the increase or decrease of SQI scores. The SQI adapted expressed the agro-environmental reality of cacao cropping systems of Bahia, Brazil, and this could be a versatile tool to subsidize the adequate soil management of cacao plantations around the world. 相似文献
3.
A. Hüttermann Prof. Dr. Ch. volger R. Schorn G. Ahnert H. G. Ganser 《Forest Pathology》1979,9(5):265-274
33 Isolates of Fomes annosus (Heterobasidion annosum) were analysed for their isoenzyme pattern of the enzyme Lactate Dehydrogenase (E.C. 1.1.1.27), Malate Dehydrogenase (E.C. 1.1.1.38), and Laccase (E.C. 1.10.3.2). For lactate dehydrogenase and malate dehydrogenase, a conspicuously high degree of variation in the isoenzyme pattern was found, indicating a rather high degree of genetic variability in the loci coding for these enzymes. The isoenzyme spectrum of laccase, however, was the same in all the strains which were tested. 相似文献
4.
M. A. Barreto J. R. B. F. Rosa I. S. A. Holanda C. B. Cardoso-Silva C. I. A. Vildoso D. Ahnert M. M. Souza R. X. Corrêa S. Royaert J. Marelli E. S. L. Santos E. D. M. N. Luz A. A. F. Garcia A. P. Souza 《Euphytica》2018,214(10):188
The cacao tree (Theobroma cacao L.) is a species of great importance because cacao beans are the raw material used in the production of chocolate. However, the economic success of cacao is largely limited by important diseases such as black pod, which is responsible for losses of up to 30–40% of the global cacao harvest. The discovery of resistance genes could extensively reduce these losses. Therefore, the aims of this study were to construct an integrated multipoint genetic map, align polymorphisms against the available cacao genome, and identify quantitative trait loci (QTLs) associated with resistance to black pod disease in cacao. The genetic map had a total length of 956.41 cM and included 186 simple sequence repeat (SSR) markers distributed among 10 linkage groups. The physical “in silico” map covered more than 200 Mb of the cacao genome. Based on the mixed model predicted means of Phytophthora evaluation, a total of 6 QTLs were detected for Phytophthora palmivora (1 QTL), Phytophthora citrophthora (1 QTL), and Phytophthora capsici (4 QTLs). Approximately 1.77–3.29% of the phenotypic variation could be explained by the mapped QTLs. Several SSR marker-flanking regions containing mapped QTLs were located in proximity to disease regions. The greatest number of resistance genes was detected in linkage group 6, which provides strong evidence for a QTL. This joint analysis involving multipoint and mixed-model approaches may provide a potentially promising technique for detecting genes resistant to black pod and could be very useful for future studies in cacao breeding. 相似文献
5.
Araujo Quintino R. de Loureiro Guilherme A. H. de A Dario Ahnert Rodrigo A. Escalona-Valdez Virupax C. Baligar 《Communications in Soil Science and Plant Analysis》2020,51(5):567-581
ABSTRACTIn cacao crop the understanding of the multiple relationships between bean and pod husk dry biomass and mineral nutrition in the soil-plant system is scarce. The main objective of this work is to verify the linear, bivariate and multivariate correlations between the mineral nutrient concentrations in the soil, leaves and beans of 53 cacao trees with known dry biomass of cacao beans and pod husk, and further graphically identifying the consistency of these information. For this study, soil samples, leaves and fruits (pod husk and beans) were collected from each cacao trees, for the analysis of nitrogen-N, phosphorous-P, potassium-K, calcium-Ca, magnesium-Mg, iron-Fe, manganese-Mn, zinc-Zn and cooper-Cu mineral nutrient concentrations. The interpretation of the results by the exploratory analysis technique linked to the linear correlation analysis proved to be an essential tool to support studies related to mineral nutrition in the soil-plant system. Foliar N concentration were directly related to the high and very high dry biomass classes of cacao beans. Levels of exchangeable Ca and Mg in the soil were inversely correlated with the dry biomass of cacao pod husk (DBCH), in contrast to results with the positive correlations of these nutrients in the leaves and cacao beans data sets. The foliar concentrations of Zn, Mn, Fe and Cu are shown to be more positively associated with DBCH than dry biomass classes of cacao beans. The concentrations of Fe, Mn and Cu in dry cacao beans show such similar pattern of association with dry biomass of pod husk and beans. 相似文献
6.
7.
1