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Variability in cacao selected by producers for resistance to witchesbroom based on microsatellite markers 生产者基于微卫星标记选择的可可抗枯病变异
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI: 10.12702/1984-7033.V04N03A05
A. S. G. Faleiro, F. Faleiro, U. Lopes, G.R.P. Melo, W. Monteiro, Rita C.S Bahia, R. Corrêa
{"title":"Variability in cacao selected by producers for resistance to witchesbroom based on microsatellite markers","authors":"A. S. G. Faleiro, F. Faleiro, U. Lopes, G.R.P. Melo, W. Monteiro, Rita C.S Bahia, R. Corrêa","doi":"10.12702/1984-7033.V04N03A05","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N03A05","url":null,"abstract":"This study aimed at a microsatellite marker-based assessment of the genetic variability of 30 accessions of Theobroma cacao selected for resistance to witchesbroom on commercial plantations in the cocoa region of Bahia State and to compare them with traditional sources of resistance to witchesbroom (SCA-6 and IMC-67) and other parents (ICS-1 and SIC-19) used in the breeding program of the Cocoa Research Center (CEPEC). Sixteen pairs of specific primers for microsatellite loci were used, generating 64 alleles. The genetic distance between the analyzed accessions ranged from 0.13 to 0.71 and the heterozygosis levels from 23 to 76%. The cluster analyses grouped 18 accessions (60%) together with SCA-6. Accessions selected on farms for their high levels of resistance to witchesbroom, good agronomic traits, which are genetically distant from SCA-6, have a high potential for the breeding program or even for direct recommendation to farmers.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"19 9 1","pages":"290-297"},"PeriodicalIF":1.5,"publicationDate":"2004-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82945798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Estimates of correlations and path analyses for eight high protein and grain yield soybean populations 8个高蛋白高产大豆群体的相关估计与通径分析
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI: 10.12702/1984-7033.V04N03A07
O. Lemos, C. Sediyama, M. Moreira, M. Reis, Guilherme Augusto, Massoni de Andrade, N. D. Piovesan
{"title":"Estimates of correlations and path analyses for eight high protein and grain yield soybean populations","authors":"O. Lemos, C. Sediyama, M. Moreira, M. Reis, Guilherme Augusto, Massoni de Andrade, N. D. Piovesan","doi":"10.12702/1984-7033.V04N03A07","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N03A07","url":null,"abstract":"Estimates of phenotypic correlations and the direct and indirect effects of grain yield and protein content components on grain and protein yields per plant were studied as source of information on eight soybean populations. Four BC1F4 and four F4 populations from crosses of high protein content materials and commercial varieties were studied. Protein yield and grain yield per plant followed an analogous tendency. The CD201-BC population presented positive correlations of protein content with protein and grain yields. All yield components presented positive direct effects for both grain and protei n yields. The number of pods per plant, amongst the yield components, presented the largest direct effects on grain and protein yields, except in the OC13-CR population. The direct effect of the protein content on protein yield was positive, yet small. Gr ain yield per plant was the main determining factor for protein yield per plant.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"34 1","pages":"305-312"},"PeriodicalIF":1.5,"publicationDate":"2004-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77055057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Genetic components of combining ability in a complete diallel 完全双列配合力的遗传成分
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI: 10.12702/1984-7033.V04N03A12
F. Ferreira, J. I. R. Júnior, C. Pacheco, C. Henrique, O. Silva, S. M. Filho
{"title":"Genetic components of combining ability in a complete diallel","authors":"F. Ferreira, J. I. R. Júnior, C. Pacheco, C. Henrique, O. Silva, S. M. Filho","doi":"10.12702/1984-7033.V04N03A12","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N03A12","url":null,"abstract":"Obtained and values were associated to theoretical concepts of the respective parameters in a complete diallel with 28 parents and the simulation of five hypothetic variables with five different d/a relations (0, 0.5, 1.0, 1.5, an d 2.0). These were controlled by a single gene with two alleles whose parents were represented by different frequencies of the favorable allele (1/28, 2/28,...,28/28). The conclusion was drawn that the existence of dominance deviations in the loci regulating the trait influences the GCA estimates considerably and that there is a high correlation (0.96) between the absolute and the respective values. The joint evaluation of and estimates provides information on the genetic quality of the populations of the diallel.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"94 1","pages":"338-343"},"PeriodicalIF":1.5,"publicationDate":"2004-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74242698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Interaction between flowering pattern and latex yield in Hevea brasiliensis Muell. Arg. 巴西橡胶树开花模式与胶乳产量的相互作用。参数。
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI: 10.12702/1984-7033.V04N03A03
K. Omokhafe
{"title":"Interaction between flowering pattern and latex yield in Hevea brasiliensis Muell. Arg.","authors":"K. Omokhafe","doi":"10.12702/1984-7033.V04N03A03","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N03A03","url":null,"abstract":"The interaction between flowering and latex yield was evaluated in 10 clones of Hevea brasiliensis to determine clonal stability across tapping seasons. The clones, consisting of seven clones developed in Nigeria and three imported clones, were evaluated for latex yield in three seasons according to the flowering pattern of Hevea trees. Latex yield data collected in five years were evaluated for clonal variation and stability using analysis of variance and five stability paramet ers. There was significant variation of latex yield across seasons, clones, and interaction of clone x season. Three Nigerian clones (NIG 800, NIG 803, and NIG 804) surpassed the imported clones in latex yield. Three clones (NIG 802, NIG 805 and RRIC 45) were stable across the three seasons and could serve as donor parents for stability genes.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"659 1","pages":"280-284"},"PeriodicalIF":1.5,"publicationDate":"2004-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76833027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Behavior of soybean genotypes transformed with the AHAS gene which confers tolerance to the herbicide imazapyr 经AHAS基因转化的大豆基因型对除草剂imazapyr的耐受性
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI: 10.12702/1984-7033.V04N03A01
Tammy Aparecida, Manabe Kiihl, C. Arias
{"title":"Behavior of soybean genotypes transformed with the AHAS gene which confers tolerance to the herbicide imazapyr","authors":"Tammy Aparecida, Manabe Kiihl, C. Arias","doi":"10.12702/1984-7033.V04N03A01","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N03A01","url":null,"abstract":"The transformation of the soybean cultivars BR-16 and Doko with the AHAS gene resulted in the development of imazapyr-tolerant herbicide genotypes. A winter greenhouse trial was conducted in order to compare the conventional genotypes BR-16 and Doko with their transformed counterparts under imazapyr application. Some aspects (number of pods and seeds weight) were evaluated and observations showed that genotype BR-16-AHAS was more affected than Doko-AHAS compared to their conventional counterparts. Another experiment was conducted with the two transformed genotypes (AHAS) at a dosage of zero and 100 g i.a. ha -1 imazapyr application in the summer. The relative responses of the two genotypes were similar to the winter results but the herbicide effects differed regarding mainly the most affected position in each genotype. The herbicide imazapyr applied (100 g i.a. ha -1) onto AHAS gene-transformed plants may induce the development of sterile pods. The herbicide and not the inserted gene is responsible for this effect.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"12 1","pages":"267-272"},"PeriodicalIF":1.5,"publicationDate":"2004-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79677607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Biotecnologia e Meio Ambiente 生物技术与环境
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI: 10.12702/1984-7033.V04N03A22
P. C. Kitamura
{"title":"Biotecnologia e Meio Ambiente","authors":"P. C. Kitamura","doi":"10.12702/1984-7033.V04N03A22","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N03A22","url":null,"abstract":"","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"3 1","pages":"375-376"},"PeriodicalIF":1.5,"publicationDate":"2004-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81251370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Repeatability and number of harvests required for selection in robusta coffee 罗布斯塔咖啡选择所需的重复性和收成数量
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI: 10.12702/1984-7033.V04N03A10
A. Fonseca, T. Sediyama, C. Cruz, S. Sakiyama, R. G. Ferrão, M. A. Ferrão, S. M. Bragança
{"title":"Repeatability and number of harvests required for selection in robusta coffee","authors":"A. Fonseca, T. Sediyama, C. Cruz, S. Sakiyama, R. G. Ferrão, M. A. Ferrão, S. M. Bragança","doi":"10.12702/1984-7033.V04N03A10","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N03A10","url":null,"abstract":"This study aimed to estimate the repeatability coefficient of the grain yield in Coffea canephora by three methods: to quantify the precision of the measurements; to predict the real value of an individual based on n evaluations; and to determine the number of phenotypic measures required in each plant to obtain an adequate precision level for an efficient discrimination of the genotypes. The coefficients of repeatability and determination were estimated based on four harvests of 80 genotypes. Highest estimates of the repeatability coefficient were obtained by the method of the principal components derived from the matrix of covariances, which expresses the correlation between each measurement pair. The prediction precision of the real individual value ranged from 65.32 to 81.59%, and remained practically unchanged from the sixth harvest on.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"4 1","pages":"325-329"},"PeriodicalIF":1.5,"publicationDate":"2004-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89185634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Biovar-specific and broad-spectrum sources of resistance to bacterial wilt (Ralstonia solanacearum) in Capsicum 辣椒对青枯病(Ralstonia solanacearum)抗性的生物多样性和广谱来源
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI: 10.12702/1984-7033.V04N03A14
C. A. Lopes, L. Boiteux
{"title":"Biovar-specific and broad-spectrum sources of resistance to bacterial wilt (Ralstonia solanacearum) in Capsicum","authors":"C. A. Lopes, L. Boiteux","doi":"10.12702/1984-7033.V04N03A14","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N03A14","url":null,"abstract":"No report has so far investigated either the biovar-specific or broad-spectrum reaction to Ralstonia solanacearum (RS) in Capsicum germplasm. Twenty-three accessions described as resistant to RS in different countries were challenged with Brazilian biovar I and biovar III isolates. Differences were observed among accessions and within biovar III isolates. In addition, isolates of biovar III were more aggressive than biovar I, reinforcing field observations which indicated that RS biovar III is predominant and more virulent and aggressive than biovar I isolates on Capsicum. Accessions previously reported as extremely resistant to RS in Asia exhibited slight wilt symptoms when challenged with Brazilian isolates. However, the high resistance levels in the inbred lines ‘MC-4’, ‘PBC 631’, ‘PBC 066’, ‘PBC 1347’, and ‘PBC 473’ make these accessions suitable for breeding programs aiming to develop pungent and/or sweet cultivars with a stable, broad-spectrum RS-resistance.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"82 1","pages":"350-355"},"PeriodicalIF":1.5,"publicationDate":"2004-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88070380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Alterations in heterosis of maize populations derived from single-cross hybrids after reciprocal recurrent selection 玉米单交杂交种相互循环选择后杂种优势的变化
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-03-30 DOI: 10.12702/1984-7033.V04N01A12
Francislei Vitti Raposo, M. Antonio, P. Ramalho, P. H. Ribeiro
{"title":"Alterations in heterosis of maize populations derived from single-cross hybrids after reciprocal recurrent selection","authors":"Francislei Vitti Raposo, M. Antonio, P. Ramalho, P. H. Ribeiro","doi":"10.12702/1984-7033.V04N01A12","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N01A12","url":null,"abstract":"One hundred and sixty-nine interpopulational half sib progenies were obtained from maize populations derived from the commercial single-cross hybrids AG9012 (1) and C333 (2) to investigate the efficiency of reciprocal recurrent selectio n (RRS). Fifteen progenies with highest hulled ear yield were obtained. Two recombination trials were sown with remnant S 1","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"91 1","pages":"74-80"},"PeriodicalIF":1.5,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83774680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Estimates of genetic parameters in a maize composite and potential for recurrent selection 玉米组合物遗传参数的估计和循环选择的潜力
IF 1.5 4区 农林科学
Crop Breeding and Applied Biotechnology Pub Date : 2004-03-30 DOI: 10.12702/1984-7033.V04N01A13
Mara Elisa, Ayres Guidetti, Zagatto Paterniani, E. Sawazaki, P. B. Gallo, R. Lüders, Ricardo Machado da Silva
{"title":"Estimates of genetic parameters in a maize composite and potential for recurrent selection","authors":"Mara Elisa, Ayres Guidetti, Zagatto Paterniani, E. Sawazaki, P. B. Gallo, R. Lüders, Ricardo Machado da Silva","doi":"10.12702/1984-7033.V04N01A13","DOIUrl":"https://doi.org/10.12702/1984-7033.V04N01A13","url":null,"abstract":"The genetic variability in the maize composite I - Mo, from the improvement program of the Instituto Agronomico de Campinas (IAC), was evaluated. Eight trials of half-sib families with 25 families each, the composite, and a commercial control AL 30 were conducted at the IAC. Individual and combined variance analyses of trials were performed and genetic variance components estimated for ear yield (EY), plant height (PH), and ear height (EH). A high additive variance value was obtained for EY, in contrast to values found in literature, indicating that composites have large variability and are promising for recurrent selection programs. The VC G/VCE index of 0.7 for EY indicated suitability for selection. Assuming a 20% selection of best families, an expected selection gain of 7.9% was estimated. Composite I - Mo has great genetic variability and a remarkable potential for breeding via recurrent selection, promising considerable selection gains in yield.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"387 1","pages":"81-85"},"PeriodicalIF":1.5,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79538836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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