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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
10/01/2010 |
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Data da última atualização: |
26/09/2013 |
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Autoria: |
WATANABE, Y. |
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Afiliação: |
Yoshio WATANABE, Laboratory of Wheat Rust Resistance, Division of Upland Farm Crops, Tohoku Nat. Agr. Exp. Station. |
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Título: |
Chromosome-mosaic observed in a variety of wheat, "Shirahada". |
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Ano de publicação: |
1962 |
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Fonte/Imprenta: |
Japanese Journal of Genetics, v. 37, n. 3, p. 194-206, 1962. |
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Idioma: |
Inglês |
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Conteúdo: |
1) A variety of wheat, ?Shirahada?, showed an abnormal meiotic behavior, ?chromosome-mosaics?. In every plant selected at random there were to be seen aneuploid PMC's such as ?hypo-? or ?hyper-? cells mixed together with euploid ones in the same anther-loculus. Especially the ?hypo-? cells with less than 2n chromosome number were frequently noticed. Such aberrant PMC's are usually characterized by a relatively large number of unpaired chromosomes.
2) In euploid PMC's there were often observed one or two pairs of univalents while multivalent chromosomes such as trivalent or tetravalent were rarely discovered. On an average about 18% of aneuploid PMC's observed had such irregularities. Laggards and bridges were also frequently observed in both 1st and 2nd anaphase, especially so in 1st division.
3) An upset in mitosis which was induced by gene-controlled spindle abnormalities just before meiosis seems to be the probable cause of the origin of these hypo- and hyper-cells.
4) As a result of such irregularities in the meiotic division, there appeared frequently in the progenies various types of aneuploids, especially monosomics (2n=41). In the self-pollinated progenies of a plant with the lowest seed fertility, a series of aneuploids having 2n=39, 40 and 41 chromosome numbers were found together with euploids (2n=42). |
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Palavras-Chave: |
Japão. |
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Thesagro: |
Trigo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01724naa a2200145 a 4500
001 1832309
005 2013-09-26
008 1962 bl --- 0-- u #d
100 1 $aWATANABE, Y.
245 $aChromosome-mosaic observed in a variety of wheat, "Shirahada".
260 $c1962
520 $a1) A variety of wheat, ?Shirahada?, showed an abnormal meiotic behavior, ?chromosome-mosaics?. In every plant selected at random there were to be seen aneuploid PMC's such as ?hypo-? or ?hyper-? cells mixed together with euploid ones in the same anther-loculus. Especially the ?hypo-? cells with less than 2n chromosome number were frequently noticed. Such aberrant PMC's are usually characterized by a relatively large number of unpaired chromosomes. 2) In euploid PMC's there were often observed one or two pairs of univalents while multivalent chromosomes such as trivalent or tetravalent were rarely discovered. On an average about 18% of aneuploid PMC's observed had such irregularities. Laggards and bridges were also frequently observed in both 1st and 2nd anaphase, especially so in 1st division. 3) An upset in mitosis which was induced by gene-controlled spindle abnormalities just before meiosis seems to be the probable cause of the origin of these hypo- and hyper-cells. 4) As a result of such irregularities in the meiotic division, there appeared frequently in the progenies various types of aneuploids, especially monosomics (2n=41). In the self-pollinated progenies of a plant with the lowest seed fertility, a series of aneuploids having 2n=39, 40 and 41 chromosome numbers were found together with euploids (2n=42).
650 $aTrigo
653 $aJapão
773 $tJapanese Journal of Genetics$gv. 37, n. 3, p. 194-206, 1962.
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Registro original: |
Embrapa Trigo (CNPT) |
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Registro Completo
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
28/03/2009 |
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Data da última atualização: |
07/05/2024 |
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Tipo da produção científica: |
Boletim de Pesquisa e Desenvolvimento |
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Autoria: |
CAVALCANTE, K. R.; TOGNI, P. H.; LANGER, L. F.; GRAVINA, C. S.; MONTEIRO, A. F. M.; PIRES, C. S. S.; FONTES, E. M. G.; SUJII. E. R. |
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Afiliação: |
KELLY RAMALHO CAVALCANTE, CENTRO UNIVERSITÁRIO DE BRASÍLIA; PEDRO HENRIQUE TOGNI, UNIVERSIDADE DE BRASÍLIA; LEONARDO FRANK LANGER; CRISTINA S. GRAVINA,, UNIVERSIDADE DE BRASÍLIA. |
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Título: |
Abundância dos inimigos naturais em tomate monocultivo e consorciado com coentro em sistema orgânico de produção. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Brasília: Embrapa Recursos Genéticos e Biotecnologia, 2008. |
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Páginas: |
30 p. |
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Série: |
(Embrapa Recursos Genéticos e Biotecnologia. Boletim de Pesquisa e Desenvolvimento, 240). |
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Idioma: |
Português |
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Palavras-Chave: |
Sistema orgânico. |
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Thesagro: |
Coentro; Controle Biológico; Praga; Tomate. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CENARGEN-2010/31591/1/bp240-1208.pdf
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Marc: |
LEADER 00877nam a2200265 a 4500
001 1191240
005 2024-05-07
008 2008 bl uuuu u0uu1 u #d
100 1 $aCAVALCANTE, K. R.
245 $aAbundância dos inimigos naturais em tomate monocultivo e consorciado com coentro em sistema orgânico de produção.$h[electronic resource]
260 $aBrasília: Embrapa Recursos Genéticos e Biotecnologia$c2008
300 $a30 p.
490 $a(Embrapa Recursos Genéticos e Biotecnologia. Boletim de Pesquisa e Desenvolvimento, 240).
650 $aCoentro
650 $aControle Biológico
650 $aPraga
650 $aTomate
653 $aSistema orgânico
700 1 $aTOGNI, P. H.
700 1 $aLANGER, L. F.
700 1 $aGRAVINA, C. S.
700 1 $aMONTEIRO, A. F. M.
700 1 $aPIRES, C. S. S.
700 1 $aFONTES, E. M. G.
700 1 $aSUJII. E. R.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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