Brazilian Journal of Genetics最新文献_第4页

Correlation between high molecular weight gluten subunits composition and bread-making quality in Brazilian wheat 巴西小麦高分子量面筋亚基组成与面包品质的相关性

Brazilian Journal of Genetics Pub Date : 1997-12-01 DOI: 10.1590/S0100-84551997000400019

I. Schuster, M. A. Souza, A. Cardoso, C. Sediyama, M. Moreira

{"title":"Correlation between high molecular weight gluten subunits composition and bread-making quality in Brazilian wheat","authors":"I. Schuster, M. A. Souza, A. Cardoso, C. Sediyama, M. Moreira","doi":"10.1590/S0100-84551997000400019","DOIUrl":"https://doi.org/10.1590/S0100-84551997000400019","url":null,"abstract":"Bread-making quality is one of the most important targets in the genetic improvement of wheat. Although extensive analyses of quality traits such as farinography, sodium dodecyl sulfate (SDS) sedimentation, alveography, and baking are made in breeding programs, these analyses require high amounts of seeds which are obtained only in late generations. In this experiment the statistical correlations between the high molecular weight subunit of glutenin and bread-making quality measured by alveograph, farinograph and SDS sedimentation were evaluated. Seventeen wheat genotypes were grown under the same conditions, each producing about 1 kg of seeds for the evaluations. The high molecular weight (HMW) glutenin subunits were analyzed by SDS-PAGE. Statistical correlations were highly significant between HMW glutenin subunits and alveograph and SDS sedimentation. These results indicate the possibility of manipulating major genes for wheat seed quality by coupling traditional breeding with non-destructive single seed analysis. Only half seed is necessary to perform the SDS-PAGE analysis. Therefore, the other half seed can be planted to generate the progeny. Seed yield and SDS sedimentation were statistically correlated, indicating the possibility of simultaneous selection for both traits","PeriodicalId":340356,"journal":{"name":"Brazilian Journal of Genetics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133699168","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: 10

Production of recombinant antigens in plants for animal and human immunization - a review 植物中用于动物和人免疫的重组抗原的制备综述

Brazilian Journal of Genetics Pub Date : 1997-12-01 DOI: 10.1590/S0100-84551997000400024

E. Hansen

引用次数: 5

Image analysis and definition of nuclear phenotypes 核表型的图像分析和定义

Brazilian Journal of Genetics Pub Date : 1997-12-01 DOI: 10.1590/S0100-84551997000400031

B. Vidal

引用次数: 9

Genetic variability in salt tolerance during germination of Stylosanthes humilis H.B.K. and association between salt tolerance and isozymes 矮茎柱花萌发耐盐遗传变异及其同工酶的关系

Brazilian Journal of Genetics Pub Date : 1997-09-01 DOI: 10.1590/S0100-84551997000300014

M. B. Lovato, P. Martins

{"title":"Genetic variability in salt tolerance during germination of Stylosanthes humilis H.B.K. and association between salt tolerance and isozymes","authors":"M. B. Lovato, P. Martins","doi":"10.1590/S0100-84551997000300014","DOIUrl":"https://doi.org/10.1590/S0100-84551997000300014","url":null,"abstract":"A variacao na tolerância salina na germinacao dentro de seis populacoes naturais de Stylosanthes humilis, provenientes de tres regioes ecogeograficas do Estado de Pernambuco, Mata (clima tropical umido), Agreste e Sertao (clima tropical semiarido), foi determinada submetendo-se sementes para germinar em NaCl 201 mM. Os resultados mostraram diferencas significativas entre familias de todas as populacoes para porcentagem de germinacao e de cinco populacoes para velocidade de germinacao, com excecao da populacao Tamandare (Mata). As populacoes das regioes semiaridas mostraram altos coeficientes de variacao genetica, sendo as do Agreste maiores que as do Sertao. As populacoes da Mata apresentaram baixos coeficientes de variacao genetica. Os coeficientes de determinacao genotipica foram altos para todas as populacoes, com excecao de Tamandare, tanto para porcentagem de germinacao (³ 0,89), como para velocidade de germinacao (³ 0,79), indicando a possibilidade de selecao para tolerância salina na germinacao nessas populacoes. Foram tambem realizadas analises de isoenzimas de esterases e peroxidases e estabelecidas correlacoes entre tolerância salina e frequencias alelicas dessas populacoes. A analise de familias sensiveis e tolerantes ao sal de populacoes do Agreste mostrou uma associacao de alelos de um loco de peroxidase com a tolerância salina durante a germinacao na populacao proveniente de Caruaru","PeriodicalId":340356,"journal":{"name":"Brazilian Journal of Genetics","volume":"283 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121235522","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: 12

Estimated frequency of B-chromosomes and population density of Astyanax scabripinnis paranae in a small stream 小流中新疆Astyanax scabripinensis的b染色体频率和种群密度估计

Brazilian Journal of Genetics Pub Date : 1997-09-01 DOI: 10.1590/S0100-84551997000300004

F. Porto‐Foresti, C. Oliveira, E. L. Maistro, F. Foresti

引用次数: 29

Clastogenic activity of integerrimine determined in mouse micronucleus assays 小鼠微核法测定胆碱的致裂活性

Brazilian Journal of Genetics Pub Date : 1997-09-01 DOI: 10.1590/S0100-84551997000300008

M. C. Gimmler-Luz, B. Erdtmann

引用次数: 3

Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens 蛋型鸡矮秆和矮秆性连锁主基因的合成及其表型效应

Brazilian Journal of Genetics Pub Date : 1997-09-01 DOI: 10.1590/S0100-84551997000300003

R. Custódio

{"title":"Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens","authors":"R. Custódio","doi":"10.1590/S0100-84551997000300003","DOIUrl":"https://doi.org/10.1590/S0100-84551997000300003","url":null,"abstract":"Neste trabalho descreve-se a obtencao de seis planteis experimentais, segregantes para os alelos ligados ao sexo, dwarf (dw), bantam (dwB) e normal (dw+), em galinhas para ovos. Comparacoes entre desempenhos entre planteis hemizigoticos para genes maiores no locus dwarf tambem foram efetuadas com relacao a comprimento de canela medida na 16a semana de idade, peso do corpo adulto, producao de ovos e maturidade sexual. Machos heterozigotos (K dw+/ k dwB) foram acasalados com femeas normais (dw+) e com femeas bantam (dwB). As progenies femeas, nos referidos acasalamentos, foram denominadas de D6.a e D6.b, respectivamente. Galos 7/8 Sebright e 1/8 dw-Leghorn heterozigotos (dwB dw) foram acasalados com tres grupos de galinhas de diferentes genotipos (dw+, dw e dwB). As progenies das maes normais (dw+), dwarf (dw) e bantam (dwB) foram denominadas de planteis D4.b, D4.c e D4.d, respectivamente. As seguintes conclusoes foram relatadas: a) a reducao no peso corporal adulto de femeas dwarf, em todos os planteis, em relacao a femeas bantam, foi menor que a relatada em relacao a galinhas normais do tipo ovo; b) a diferenca entre a taxa de postura de galinhas normais e suas irmas bantam nao foi estatisticamente significativa em femeas dw+ (filhas de maes dw+), pesando 1897 g. Porem, em galinhas dwB com peso medio de 1646 g (filhas de maes dwB), a diferenca entre a taxa de postura de galinhas normais e de suas irmas bantam foi significativa (P < 0,05). Portanto, o alelo dwB pode ter um efeito semelhante, porem menor sobre a taxa de postura do que seu alelo dwarf; c) a diferenca entre maturidade sexual de galinhas normais e bantam, filhas de maes maiores ou menores, nao foi estatisticamente significativa, muito embora a postura do primeiro ovo tenha ocorrido 2,9 dias mais tarde em frangas dwB menores; d) o comprimento de canela associado ao peso adulto possibilitou a discriminacao precisa entre bantams e dwarfs.","PeriodicalId":340356,"journal":{"name":"Brazilian Journal of Genetics","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117237077","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

Chromosome number and secondary constriction variation in 51 accessions of a citrus germplasm bank 柑橘种质库51份材料的染色体数目和次生缩窄变异

Brazilian Journal of Genetics Pub Date : 1997-09-01 DOI: 10.1590/S0100-84551997000300021

M. Guerra, A. Pedrosa, A. E. B. E. Silva, M. T. M. Cornélio, K. G. B. Santos, W. S. Filho

{"title":"Chromosome number and secondary constriction variation in 51 accessions of a citrus germplasm bank","authors":"M. Guerra, A. Pedrosa, A. E. B. E. Silva, M. T. M. Cornélio, K. G. B. Santos, W. S. Filho","doi":"10.1590/S0100-84551997000300021","DOIUrl":"https://doi.org/10.1590/S0100-84551997000300021","url":null,"abstract":"The mitotic chromosomes of 51 citrus accessions from the Centro Nacional de Pesquisa em Mandioca e Fruticultura Tropical, Cruz das Almas, BA, Brazil, were analyzed. The sample included representatives of 20 Citrus species, one of Poncirus and seven hybrids. All accessions showed 2n = 18 without any evidence of numerical variation. The most clearly variable karyotype feature was the number and position of secondary constrictions (SECs). In 19 accessions the SECs were not identified, mainly due to the degree of chromatin condensation. In the remainder they varied in number from one to three per karyotype. They were found in the proximal region of one of the three largest chromosome pairs, in the terminal/subterminal region of a smaller chromosome or, more seldom, terminally in a larger chromosome. Only in a few cases were such constrictions observed simultaneously in both homologues of the same chromosome pair. The high variability of this karyotype feature may be due to the activation of this region in the previous interphase but may also indicate a high structural variability and heterozygosity of citrus germplasms","PeriodicalId":340356,"journal":{"name":"Brazilian Journal of Genetics","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115406960","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: 36

Plant height reduction in populations of triticale (X triticosecale Wittmack) by induced mutations and artificial crosses 诱导突变和人工杂交降低小黑麦群体株高的研究

Brazilian Journal of Genetics Pub Date : 1997-09-01 DOI: 10.1590/S0100-84551997000300020

Fábio Pandini, F. Carvalho, J. F. B. Neto

引用次数: 14

Estimates of genetic and phenotypic parameters in a segregant population of rice irrigated by continuous flooding 连续洪水灌溉水稻分离群体遗传和表型参数的估计

Brazilian Journal of Genetics Pub Date : 1997-09-01 DOI: 10.1590/S0100-84551997000300013

Patrícia Guimarães Santos, A. Soares, M. Ramalho

引用次数: 0