|
Registro Completo |
|
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
|
Data corrente: |
11/10/1999 |
|
Data da última atualização: |
11/10/1999 |
|
Autoria: |
CARVALHO, R. de; GUERRA, M.; CARVALHO, P. C. L. de. |
|
Afiliação: |
Departamento de Botanica(CCB); Universidade Federal de Pernambuco; Departamento de Fitotecnia, Escola de Agronomia de Cruz das Almas, Bahia. |
|
Título: |
Occurrence of spontaneous triploidy in Manihot esculenta Crantz |
|
Ano de publicação: |
1999 |
|
Fonte/Imprenta: |
Cytologia, v.64, p.137-140, 1999 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The spontaneous occurrence of a triploid is reported in Manihot esculenta Crantz collected in Sape-PB, Brazil. Mitotic analysis showed a stable chromosome number of 2n = 54, with chromosome size and morphology very similar to the diploid species. The chromosome behavior in meiosis was irregular in the metaphase-anaphase I, with occurrence of uni, bi and trivalents. The average number of univalents per cell was 7.2. In the tetrad stage, a higher number of micronuclei were found, resulting in almost 100% of abnormal tetrads and pollen sterility. Triploid was also characterized by having larger and fewer stomata than diploid species. |
|
Palavras-Chave: |
Spontaneous triploidy. |
|
Thesagro: |
Manihot Esculenta. |
|
Thesaurus Nal: |
microsporogenesis; stomata. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01154naa a2200193 a 4500
001 1648329
005 1999-10-11
008 1999 bl --- 0-- u #d
100 1 $aCARVALHO, R. de
245 $aOccurrence of spontaneous triploidy in Manihot esculenta Crantz
260 $c1999
520 $aThe spontaneous occurrence of a triploid is reported in Manihot esculenta Crantz collected in Sape-PB, Brazil. Mitotic analysis showed a stable chromosome number of 2n = 54, with chromosome size and morphology very similar to the diploid species. The chromosome behavior in meiosis was irregular in the metaphase-anaphase I, with occurrence of uni, bi and trivalents. The average number of univalents per cell was 7.2. In the tetrad stage, a higher number of micronuclei were found, resulting in almost 100% of abnormal tetrads and pollen sterility. Triploid was also characterized by having larger and fewer stomata than diploid species.
650 $amicrosporogenesis
650 $astomata
650 $aManihot Esculenta
653 $aSpontaneous triploidy
700 1 $aGUERRA, M.
700 1 $aCARVALHO, P. C. L. de
773 $tCytologia$gv.64, p.137-140, 1999
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
|
