Research Article

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09/23/2002
Capsicum annuum; Gene action; Heritability; Meloidogyne incognita; Monogenic inheritance; Resistance

Root-knot nematodes of the genus Meloidogyne are important pathogens affecting vegetable crop production in Brazil and worldwide. The pepper species Capsicum annuum includes both hot and sweet peppers; very little emphasis has been placed on breeding sweet peppers for nematode resistance. We report on the inheritance of resistance to Meloidogyne incognita ( ... more

F. de Souza-Sobrinho; W.Roberto Maluf; L.A.A. Gomes; V.Paulo Campos
03/19/2002
Lactuca sativa L.; Lettuce; Meloidogyne javanica; Nematode; Resistance

Resistance to the root-knot nematodes Meloidogyne spp. would be a valuable attribute of lettuce Lactuca sativa L. cultivars grown in tropical regions. The looseleaf lettuce ‘Grand Rapids’ is resistant to both M. incognita and M. javanica. Resistance to M. incognita has a high heritability, under the control of a single gene locus, in which the ... more

W.Roberto Maluf; S.Márcio Azevedo; L.Antonio Au Gomes; A.Cláudia B. de Oliveira
03/31/2004
Antibiotics; Chromobacterium violaceum; Resistance

Chromobacterium violaceum is a free-living bacterium commonly found in aquatic habitats of tropical and subtropical regions of the world. This bacterium is able to produce a large variety of products of biotechnological and pharmacological use. Although C. violaceum is considered to be non-pathogenic, some cases of severe infections in humans and other animals have been reported ... more

F. Fantinatti-Garboggini; R. de Almeida; Vdo Amaral Portillo; T.A.P. Barbosa; P.Beltramini Trevilato; C.Eduardo Ra Neto; R.Duarte Coêlho; L.Aparecida Bartoleti; E.Seixas Hanna; M. Brocchi; G.P. Manfio; D.Wanderlei Silva
03/10/2003
Honey bee comb; Natural comb cell size; Reproduction; Resistance; Varroa destructor

Africanized honey bees (Apis mellifera, Hymenoptera: Apidae) in Brazil are tolerant of infestations with the exotic ectoparasitic mite, Varroa destructor (Mesostigmata: Varroidae), while the European honey bees used in apiculture throughout most of the world are severely affected. Africanized honey bees are normally kept in hives with both naturally built small width ... more

G.A. Piccirillo; D. De Jong
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DNA sequence; Gene-rich region; Molecular marker; Resistance; Yellow rust

Analysis of DNA sequence variation among genotypes is useful for differentiation of wheat accessions, selection strategies and genetic development of crop plants. We screened molecular markers for yellow rust resistance genes (Yr7, Yr9, Yr15, Yr18, Yr26, and YrH52), which are in the gene-rich regions of wheat chromosomes 1B, 2B, and 7D ... more

E. Cabuk; Y. Aydin; A.A. Uncuoglu
03/22/2011
Actin; Bent DNA; Bombyx mori; Nucleopolyhedrovirus; Resistance

Previous reports demonstrated that actin is necessary for nucleocapsid transport and viral gene expression during nucleopolyhedrovirus infection of Bombyx mori. The first intron of B. mori A3 actin contains a cryptic promoter that drives expression of a rare isoform. We detected differences in the size and nucleotide composition of the first intron of the A3 actin gene ... more

J. Tavares; J.P. Bravo; F. Gimenes; Q.A.L. Neto; A. Fiorini; M.A. Fernandez
02/23/2010
Genotype; RAPD; Resistance; Varroa destructor

The mite Varroa destructor is the main pest causing damage to apiculture worldwide. In Brazil and other parts of the world, where bees of African origin and their hybrids predominate, the bees can survive these mites without treatment. Studies have shown a correlation between the various genotypes of the mite and its fertility in different geographical regions. Information about ... more

J.C.V. Guerra; M.R.C. Issa; F.E. Carneiro; R. Strapazzon; G. Moretto
03/14/2012
AFLP; Alfalfa; Common leafspot; Resistance; SCAR

To identify amplified fragment length polymorphism (AFLP) markers associated with resistance or susceptibility of alfalfa to common leafspot (CLS) caused by the fungus Pseudopeziza medicaginis (Dermateaceae), bulked segregant analysis was conducted based on an F1(M × M) population of 93 plants and a BC1S population of 91 plants. Three AFLP markers, ACTCAA ... more

Y. Wang; B. Bi; Q.H. Yuan; X.L. Li; J.M. Gao
11/07/2014
Line-by-isolate interaction; Phaseolus vulgaris; Resistance; Straw test

The aims of this study were to evaluate the reaction of common bean lines to white mold, the aggressiveness of different Sclerotinia sclerotiorum isolates from various common bean production areas in Brazil, and comparison of the diallel and GGE (genotype main effect plus genotype-by-environment interaction) biplot analysis procedures via study of the line-by-isolate interaction ... more

P.H. Silva; J.B. Santos; I.A. Lima; L.A.C. Lara; F.C. Alves

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