African Journal of Plant Science最新文献_第4页

Litterfall production, nutrient input and soil fertility in yerba-mate agroforestry systems 马黛茶复合农林业系统凋落物产量、养分投入和土壤肥力

African Journal of Plant Science Pub Date : 2021-04-30 DOI: 10.5897/AJPS2020.2068

Neuri Carneiro Machado, A. F. Fonseca, F. P. Chaimsohn, Flavia Biassio Riferte

{"title":"Litterfall production, nutrient input and soil fertility in yerba-mate agroforestry systems","authors":"Neuri Carneiro Machado, A. F. Fonseca, F. P. Chaimsohn, Flavia Biassio Riferte","doi":"10.5897/AJPS2020.2068","DOIUrl":"https://doi.org/10.5897/AJPS2020.2068","url":null,"abstract":"Adoption of agroforestry systems (AFS) for yerba mate (Ilex paraguariensis St. Hil.) production contributes to improvement of soil quality due to intense litterfall input. This study aimed (i) to quantify the litterfall input and its nutrients, as well as soil fertility attributes in yerba mate AFS (ii) to discriminate which soil fertility attributes and litterfall nutrients enabled differentiation of yerba mate AFS and (iii) to verify relations between the soil fertility attributes and nutrients supplied. Six yerba mate AFS were studied in three different soils in the Center-South region of Parana State, Brazil. The canonical discriminant analysis was applied to the soil fertility attributes, for the 0-5, 5-10, 10-20 and 20-40 cm soil layers; and for the nutrients annual input. The study of the relation between the nutrient input and nutrients soil content was carried out through the canonical correlation analysis. Litterfall input varied from 7132 to 9402 kg ha-1 year-1, and showed an important source of nutrients. Copper and aluminum soil content were the variables responsible for differentiating AFS, by canonical discriminant analysis. There was strait relation between calcium, magnesium, copper, manganese and zinc input and these nutrients content in the soil in yerba mate AFS. \u0000 \u0000 \u0000 \u0000 Key words: Ilex paraguariensis St. Hill., discriminant analysis, variable charge soils.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"113 1","pages":"100-114"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89546536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pharmacognostic and phytochemical characterization of Maerua angolensis DC. 安哥拉Maerua DC的生药学和植物化学特性。

African Journal of Plant Science Pub Date : 2021-04-30 DOI: 10.5897/AJPS2020.2121

O. Adigwe, J. Ibrahim, Aisha Halilu Buhari, K. A. Muhammed, R. A. Kirim, A. Danraka, H. Egharevba

{"title":"Pharmacognostic and phytochemical characterization of Maerua angolensis DC.","authors":"O. Adigwe, J. Ibrahim, Aisha Halilu Buhari, K. A. Muhammed, R. A. Kirim, A. Danraka, H. Egharevba","doi":"10.5897/AJPS2020.2121","DOIUrl":"https://doi.org/10.5897/AJPS2020.2121","url":null,"abstract":"Maerua angolensis DC is a medicinal plant widely used in ethnomedicine in northern Nigeria. It is used to treat disease conditions like skin infections, sexually transmitted diseases, peptic ulcers and wounds amongst others. The plant is well known in Fulani Fulfude as leggal baali (or leggal mbaali). The plant was subjected to pharmacognostic and physicochemical characterization to establish standard profiles for authentication of the plant which could be useful for further study on the plant. The chromatographic (TLC and HPLC) and phytochemical profiles were conducted along with the leaf microscopy and chemomicroscopy, using standard methods. The result established the chromatographic profile of the leaf extract. The qualitative phytochemical screening showed the presence of carbohydrates, saponins, anthraquinones and cardiac glycosides. The chemomicroscopy revealed the presence of lignin, cellulose, tannin, starch and oil, while mucilage and protein were not seen. The total ash content and moisture content were 12.1 and 7.0%, respectively and were within WHO limits. Extracts of the plant showed high hygroscopic character. The result provides good information for the authentication and use of the plant in further research and development. \u0000 \u0000 \u0000 \u0000 Key words: Maerua angolensis, pharmacognostic character; phytochemicals, chromatographic profile.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"508 1","pages":"94-99"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80075722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparative effect of weed control methods on Mexican sunflower (Tithonia diversifolia) in maize 玉米中墨西哥向日葵(Tithonia diverfolia)杂草防治方法比较效果

African Journal of Plant Science Pub Date : 2021-04-30 DOI: 10.5897/AJPS2020.2114

J. Amosun, O. Aluko, D. Ilem

{"title":"Comparative effect of weed control methods on Mexican sunflower (Tithonia diversifolia) in maize","authors":"J. Amosun, O. Aluko, D. Ilem","doi":"10.5897/AJPS2020.2114","DOIUrl":"https://doi.org/10.5897/AJPS2020.2114","url":null,"abstract":"Mexican sunflower management in arable crops is becoming increasingly important due to its prevalent growth habit. The field experiments were conducted to compare weed suppressive abilities of two cover crops and two maize herbicides on Mexican sunflower. The treatments consist of the pre-emergence application of Primextra Gold (atrazine + metolachlor) at 4 l/ha, a post-emergence application of Aminoforce (2, 4-D) at 1.6 l/ha, two cover crops, Centrosema pubescens (Centro) at 2.5 kg/ha and Pueraria phaseoloides (Puero) at 2.0 kg/ha, hand weeding at 2 and 5 weeks after sowing (WAS) and no weeding. The experimental design was a randomized complete block design with four replications. Pre-emergence herbicide produced taller plants at 8 and 12 WAS and higher number of leaves at 12 WAS. Despite two hand weedings (at 2 and 5 WAS), the weed biomass of hand weeding treatment was not different from no weeding. Higher weed densities produced by hand weeding and no weeding at 12 WAS indicated that the two herbicides and the two cover crop treatments gave better weed control than both weed checks. Weed control was 4, 7 and 8 times better in pre-emergence, post-emergence and Centro; respectively, than no weeding at 8 WAS. Although Centro provided long term weed control, the herbicides were able to provide early protection for the maize plants. The highest maize yield of 2.21 t/ha obtained from Primextra Gold (atrazine + metolachlor) at 4l/ha was significantly higher than yields from the other treatments. Yield reduction of 24.5, 27.7, 34.4, 40.8 and 94.2% was obtained in 1.6 l/ha Aminoforce, Centro, hand weeding, Puero and no weeding, respectively, when compared to maize yield from Primextra Gold. \u0000 \u0000 \u0000 \u0000 Key words: Mexican sunflower, cover crops, herbicides, hand weeding, weed control.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"12 1","pages":"115-122"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82310118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The multi-level table and circular diagnostic chart as alternative taxonomic key formats for plant identification 多级表和圆形诊断图作为植物鉴定的分类关键格式

African Journal of Plant Science Pub Date : 2021-03-31 DOI: 10.5897/AJPS2020.2101

A. Ogunkunle

{"title":"The multi-level table and circular diagnostic chart as alternative taxonomic key formats for plant identification","authors":"A. Ogunkunle","doi":"10.5897/AJPS2020.2101","DOIUrl":"https://doi.org/10.5897/AJPS2020.2101","url":null,"abstract":"Correct identification of plants is a prerequisite to achieving desirable results in health care delivery, sustainable food production and housing, forest resources management and environmental protection. However, many of the paper-based/printable taxonomic key formats available to the taxonomist for this important responsibility are fraught with inadequacies some of which include fixed sequence of plant identification steps, non- or hardly-susceptible to computerisation, lack of provision for confirmation of suspected plant identity and indeterminable character states, and tedious construction and navigation procedures. This paper with the aim of making the practice of plant taxonomy more attractive, less laborious and dreaded, proposes two new key formats with highlights of their design/features, construction procedures and usage. These alternative key formats, with varying capacities to circumvent some of the enumerated challenges are multi-level table of identification and multi-layer circular diagnostic chart. The status of each of the proposed key formats is discussed with reference to the inadequacies observed in the dichotomous key format with which most taxonomists are familiar. Based on their structural features and functionality attributes, it is conclusive that the two alternative key formats constitute useful templates upon which reliable plant diagnostic tools can be based. \u0000 \u0000 \u0000 \u0000 Key words: Automated plant identification, computerised key, diagnostic key, dichotomous key, multi-access key, plant identification, single-access key, taxonomic key.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"35 1","pages":"82-93"},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87303047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Grain yield and stability of selected early and medium duration cowpea in Ghana 加纳精选早、中期豇豆的产量和稳定性

African Journal of Plant Science Pub Date : 2021-03-31 DOI: 10.5897/AJPS2020.2125

T. K. Tengey, E. Y. Owusu, F. Kusi, G. Mahama, F. J. Awuku, Emmanuel Kofi Sei, O. A. Amoako, M. Haruna

{"title":"Grain yield and stability of selected early and medium duration cowpea in Ghana","authors":"T. K. Tengey, E. Y. Owusu, F. Kusi, G. Mahama, F. J. Awuku, Emmanuel Kofi Sei, O. A. Amoako, M. Haruna","doi":"10.5897/AJPS2020.2125","DOIUrl":"https://doi.org/10.5897/AJPS2020.2125","url":null,"abstract":"Changes in climate are a major driver for climate-smart crops with short duration on-field and adaptation to diverse growing conditions. This study evaluated the performance of nine early duration and 10 medium duration cowpea genotypes at six locations within the Guinea and Sudan savanna zones of Ghana. Genotypes for each maturity group were laid out in a Randomized Complete Block Design with three replications for each location. There were significant (p<0.001) genotype, environment and genotype x environment effects of the cowpea genotypes of both maturity groups for grain yield. Among the early duration cowpea tested, GGE biplot analysis revealed SARI-2-50-80, SARI-13-17-2, IT99K-1122, SARI-3-11-80, and IT07K-299-6, respectively, as having high yield and stable performance across the six test environments; and out-performed the check variety, Kirkhouse Benga. With the medium duration trials, IT86D-610, IT10K-837-1, and SARI-6-2-6 had high yields, which were comparable to the check, Padituya. IT10K-837-1 was the most stable and had a relatively shorter maturity period. Grain yield performance of early duration cowpea was discriminated by three mega environments while only two mega environments discriminated grain yield of medium duration cowpea. The selected genotypes could be used in hybridizations or released as cowpea varieties in the country. \u0000 \u0000 \u0000 \u0000 Key words: Genotype x environment, maturity period, multi-location, biplot analysis, genetic variability.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"3 1","pages":"71-81"},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88085750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Solving the mystery of the construction and elucidating the structural and functionality attributes of dichotomous key, a widely used tool for plant identification 解决了二分类键的构造之谜，阐明了二分类键的结构和功能属性，这是一种广泛使用的植物识别工具

African Journal of Plant Science Pub Date : 2021-02-28 DOI: 10.5897/AJPS2020.2021

A. Ogunkunle

{"title":"Solving the mystery of the construction and elucidating the structural and functionality attributes of dichotomous key, a widely used tool for plant identification","authors":"A. Ogunkunle","doi":"10.5897/AJPS2020.2021","DOIUrl":"https://doi.org/10.5897/AJPS2020.2021","url":null,"abstract":"The significance of correct identification of plants is acknowledged in many human endeavours such as health care, food production, sustainable housing, forest resources management and environmental protection. Plant identification is usually carried out by means of descriptions and keys, which are available in floras, manuals or other taxonomic publications, the most widely used tool being the dichotomous key. However, the construction and navigation of dichotomous keys are tedious. Thus identification is viewed by many practitioners as onerous task, which has led to declining interest in plant taxonomy. Therefore, the objective of this paper is to simplify the writing and application of the dichotomous key format, with the aim of making the practice of plant taxonomy more attractive, less laborious and dreaded for upcoming students of biology. A proposal on step-by-step, readily comprehensible procedure for making a dichotomous key from a conventional table of character comparison is presented. Some basic features of the key format (that is, couplets, leads, references, pointers, and endpoints), its variants (that is, indented and bracketed), and applicable enhancements, such as looping, nesting, and reticulations, use of polychotomous leads and tabula are illustrated and discussed. \u0000 \u0000 \u0000 \u0000 Key words: Bracketed key, computerised key, diagnostic key, indented key, identity confirmation, nested key, reticulation, taxonomic key.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"2 1","pages":"49-58"},"PeriodicalIF":0.0,"publicationDate":"2021-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86464285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular characterization of garlic (Allium sativum L.) using SSR markers in Ethiopia 埃塞俄比亚大蒜(Allium sativum L.)的SSR分子标记研究

African Journal of Plant Science Pub Date : 2021-02-28 DOI: 10.5897/AJPS2020.2013

K. Tesfu, Nitsuh Aschale, Emebet Regassa, Helen Gebremdhen, Obsi Desalegn, Demilew Deres, Sara Gebremeskel

{"title":"Molecular characterization of garlic (Allium sativum L.) using SSR markers in Ethiopia","authors":"K. Tesfu, Nitsuh Aschale, Emebet Regassa, Helen Gebremdhen, Obsi Desalegn, Demilew Deres, Sara Gebremeskel","doi":"10.5897/AJPS2020.2013","DOIUrl":"https://doi.org/10.5897/AJPS2020.2013","url":null,"abstract":"Garlic is one of the most cultivated and medicinal horticultural crops in the world. Its production and productivity is decreased due to different constraints. Knowing the genetic distance will give information to tackle the constraints. This study characterized genetic diversity of garlic germplasm by analysis of eleven Simple Sequence Repeats (SSR) loci in 115 garlic accession. Genomic DNA was extracted from fresh leaf tip using modified Diversity Array Technology (DArT) protocol. Touch down polymerase chain reaction (PCR) was also used to get optimal annealing temperature for each Simple Sequence Repeats (SSR) primers. A number of monomorphic and few polymorphic bands were obtained from eleven SSR markers. The gel pictures show monomorphic bands between genotypes. However, some markers: ASM 080, ASA 20, ASA23, and GB-ASM 053 generated polymorphic bands. Dendrogram of genetic distances amongst all tested genotypes showed three distinct major clusters, and six sub-clusters. This study will guide decision making on introduction of germplasm for enhancing genetic diversity or creation of new variations to improve and widen the genetic base of garlic. \u0000 \u0000 \u0000 \u0000 Key words: Garlic, genetic variation, polymorphism.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"12 1","pages":"59-63"},"PeriodicalIF":0.0,"publicationDate":"2021-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76314552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Incidence and characterization of cassava mosaic viruses in improved and local cultivars in Sierra Leone 塞拉利昂木薯花叶病毒在改良品种和地方品种中的发病率和特性

African Journal of Plant Science Pub Date : 2021-02-28 DOI: 10.5897/AJPS2020.2111

J. V. Sesay, Aiah Lebbie, R. Wadsworth

{"title":"Incidence and characterization of cassava mosaic viruses in improved and local cultivars in Sierra Leone","authors":"J. V. Sesay, Aiah Lebbie, R. Wadsworth","doi":"10.5897/AJPS2020.2111","DOIUrl":"https://doi.org/10.5897/AJPS2020.2111","url":null,"abstract":"In Sub-Sahara Africa, Cassava Mosaic Disease (CMD) is the major important viral disease of cassava which threatens production, livelihoods and food security. Frequently CMD is due to the Africa Cassava Mosaic Virus (ACMV), East African Cassava Mosaic Virus (EACMV) and the Ugandan strain of the East African virus (EACMV-UG). The present study investigated the prevalence of these three viruses in 27 cultivars (three improved and 24 local) of cassava grown across all key agro-ecological zones and regions in Sierra Leone. Leaf samples from each of these varieties with symptoms as well as asymptomatic ones were harvested from a clonal garden established on the Njala University Campus. Deoxyribonucleic acid (DNA) extracted from these samples was assessed with Marker Assisted Selection (MAS) for ACMV, EACMV and EACMV-UG using polymerase chain reaction (PCR) and primers designed to amplify replica regions of the DNA-A components of these viruses. The results revealed the ACMV is very common (26 out of 27 samples), while EACMV and EACMV-UG are less common (3 out of 27). Samples with EACMV-UG also had ACMV. These findings are of importance to future breeding programs for resistance to CMD with the aim of producing multiple viral resistant clones for increased food security in the country. \u0000 \u0000 \u0000 \u0000 Key words: Cassava, DNA, characterization, mosaic viruses, incidence, varieties, Sierra Leone.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"38 1","pages":"64-70"},"PeriodicalIF":0.0,"publicationDate":"2021-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74534525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Association between agro-morphological traits in common bean under organic fertilization management in Brazil 巴西有机肥管理下普通豆农业形态性状的相关性研究

African Journal of Plant Science Pub Date : 2021-01-31 DOI: 10.5897/AJPS2020.2009

R. S. Rocha, M. Jaeggi, I. M. Pereira, D. P. Cruz, M. R. Nascimento, A. G. D. Souza, Doriam Fel icio Peres, G. D. A. Gravina, J. N. Batista, R. D. K. G. D. Silva, Dalcirlei Pinheiro Albuquerque, L. Rodrigues, M. Freitas, Benjamim Valentim da Silva, G. Entringer, R. Daher, T. Oliveira, E. D. C. Monteiro, Rogério R Rodrigues, A. Fonseca, M. D. C. Parajara, Juliana Elias de Oliveira, L. M. Gravina, W. B. D. S. Oliveira, Vinicius de Freitas Mateus, Samyra de Araújo Capetini, C. Sant’Anna, J. G. Rocha, S. C. Pizetta, W. L. Lima, André O Souza

{"title":"Association between agro-morphological traits in common bean under organic fertilization management in Brazil","authors":"R. S. Rocha, M. Jaeggi, I. M. Pereira, D. P. Cruz, M. R. Nascimento, A. G. D. Souza, Doriam Fel icio Peres, G. D. A. Gravina, J. N. Batista, R. D. K. G. D. Silva, Dalcirlei Pinheiro Albuquerque, L. Rodrigues, M. Freitas, Benjamim Valentim da Silva, G. Entringer, R. Daher, T. Oliveira, E. D. C. Monteiro, Rogério R Rodrigues, A. Fonseca, M. D. C. Parajara, Juliana Elias de Oliveira, L. M. Gravina, W. B. D. S. Oliveira, Vinicius de Freitas Mateus, Samyra de Araújo Capetini, C. Sant’Anna, J. G. Rocha, S. C. Pizetta, W. L. Lima, André O Souza","doi":"10.5897/AJPS2020.2009","DOIUrl":"https://doi.org/10.5897/AJPS2020.2009","url":null,"abstract":"The objective of this work was to analyze the association between agro-morphological traits of the common bean cultivar “BRS Esplendor” under organic fertilization management. The experiment was implemented in the field, in a randomized block design, with three replications, in a split plot scheme, with two types of organic compounds (grass enriched with cattle manure and bean straw enriched with cattle manure) applied in six doses (0.0, 33.32, 66.65, 100.00, 133.32 and 166.65%). The control treatment comprised the recommended mineral fertilization. The characteristics include total number of pods, plant height and pod lengths are determinant to directly increase grain yield. The indirect determinant includes total weight of pods, total number of grains, plant height, root length and length of pods that had a positive effect with high magnitude on the characteristic total number of pods. \u0000 \u0000 \u0000 \u0000 Key words: Phaseolus vulgaris, correlations, track analysis.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75565693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic relationship and the occurrence of multiple gene resistance to coffee berry disease (Colletotrichum kahawae, Waller Bridge) within selected Coffea arabica varieties in Kenya 在肯尼亚选定的阿拉比卡咖啡品种中，对咖啡浆果病(Colletotrichum kahawae, Waller Bridge)多基因抗性的遗传关系和发生

African Journal of Plant Science Pub Date : 2021-01-31 DOI: 10.5897/AJPS2020.2074

James M. Gimase, W. Thagana, C. Omondi, J. Cheserek, E. Gichuru

{"title":"Genetic relationship and the occurrence of multiple gene resistance to coffee berry disease (Colletotrichum kahawae, Waller Bridge) within selected Coffea arabica varieties in Kenya","authors":"James M. Gimase, W. Thagana, C. Omondi, J. Cheserek, E. Gichuru","doi":"10.5897/AJPS2020.2074","DOIUrl":"https://doi.org/10.5897/AJPS2020.2074","url":null,"abstract":"The Coffee Berry Disease (CBD) epidemics destroy up to 100% of the crop on a susceptible variety. Resistance to CBD is conferred by the T-gene in Hibrido De Timor (HDT), R-gene in Rume Sudan (RS), and k-gene in K7, which were assembled in resistance varieties Ruiru 11(R11) and Batian. This study aimed to evaluate the genetic relationship between R11 and Batian with their parents' HDT, RS, SL8 and confirm the occurrence of T and R genes using DNA markers. Genome-wide single nucleotide polymorphism (SNP) markers were obtained through Diversity Arrays Technology sequencing (DArTseq). The genetic relationship was analyzed by Principal Component Analysis and hierarchical clustering. The Tgene was confirmed using Microsatellite primer, Sat 235 while the R gene was by marker sequence search within the DArTseq result files. The PC1 accounted for 42% of the total variation. Hierarchical clustering revealed less than 10% dissimilarity index apart from HDT that recorded above 20%. All the R11 and Batian genotypes carry the T gene. Eleven genotypes carry both T and R genes, therefore, with broad-based resistance to CBD. The study confirmed the narrow genetic relations within the Coffea arabica coffee varieties and further confirmed the occurrence of multiple gene resistance in R11 and Batian that will not break easily to new pathogen races. \u0000 \u0000 \u0000 \u0000 Key words: Coffee berry disease, diversity arrays technology sequencing, T gene, R gene, Ruiru 11, Batian, SL 28, codominant.","PeriodicalId":7675,"journal":{"name":"African Journal of Plant Science","volume":"75 1","pages":"39-48"},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88660162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2