|
|
|
|
|
| Pierozzi,Pedro Henrique Braga; Ribeiro,Aliny Simony; Moreira,José Ubirajara Vieira; Laperuta,Larissa Di Cássia; Rachid,Breno Francovig; Lima,Wilmar Ferreira; Arias,Carlos Alberto Arrabal; Oliveira,Marcelo Fernandes de; Toledo,José Francisco Ferraz de. |
| Asian soybean rust (ASR), caused by the phytopathogenic fungi Phakopsora pachyrhizi, has caused large reductions in soybean (Glycine max) yield in most locations in Brazil where it has occurred since it was first reported in May 2001. Primary efforts to combat the disease involve the development of resistant cultivars, and four dominant major genes (Rpp1, Rpp2, Rpp3 and Rpp4) controlling resistance to ASR have been reported in the literature. To develop new long-lasting soybean ASR resistance genes, we used field experiments to assess ASR leaf lesion type in 11 soybean genotypes (BR01-18437, BRS 184, BRS 231, BRS 232, BRSGO Chapadões, DM 339, Embrapa 48, PI 200487, PI 230970, PI 459025-A and PI 200526) and the 55 F2 generations derived from their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Disease resistance; Genetic inheritance; Major genes; Phakopsora pachyrhizi. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000300018 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Minella,Euclydes; Sorrells,Mark Earl. |
| Aluminum (Al) toxicity is a major factor limiting barley growth in acid soils, and genotypes with adequate level of tolerance are needed for improving barley adaptation in Brazil. To study the inheritance of Al tolerance in Brazilian barleys, cultivars Antarctica 1, BR 1 and FM 404 were crossed to sensitive Kearney and PFC 8026, and intercrossed. Parental, F1, F2 and F6 generations were grown in nutrient solution containing 0.03, 0.05 and 0.07 mM of Al and classified for tolerance by the root tip hematoxylin staining assay. Tolerant by sensitive F2 progenies segregated three tolerant to one sensitive, fitting the 3:1 ratio expected for a single gene. The F6 populations segregated one tolerant to one sensitive also fitting a monogenic ratio. The F2... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hordeum vulgare; Genotypes; Genetic inheritance; Toxicity. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000800007 |
| |
|
| |
|
| |
|
|
| Candido,Willame dos Santos; Castoldi,Renata; Santos,Lucas da Silva; Tobar-Tosse,Dora Enith; Soares,Pedro Luiz Martins; Braz,Leila Trevisan. |
| ABSTRACT: In order to assess the genetic control of resistance in the melon ‘Gaúcho Redondo’ to the root-knot nematode Meloidogyne incognita, an experiment was conducted in a randomized complete block design with three blocks and six treatments using the parental lines ‘Gaúcho Redondo’ (P1 resistant) and JAB 20 (P2 susceptible), as well as F1, F2, and backcross generations (RC1P1 and RC1P2). Seventy days after inoculation, individual plants were evaluated for resistance using the nematode reproduction factor (RF). The hypothesis of monogenic inheritance was rejected by the chi-square test (χ2), and results indicated that resistance is controlled by more than one gene locus, as confirmed by the quantitative analysis that revealed the presence of six genes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Genetic inheritance; Plant breeding; Reproduction factor. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500201 |
| |
|
|
|
