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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
18/04/1994 |
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Data da última atualização: |
18/04/1994 |
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Autoria: |
BAI, K. V.; ASIEDU, R.; DIXON, A. G. O. |
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Afiliação: |
IITA, Ibadan, Nigeria. |
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Título: |
Cytogenetics of Manihot species and interspecific hybrids |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Cali, Colombia, CIAT 1993 |
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Páginas: |
51-56p |
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Série: |
CIAT, Working Document, 123 |
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Idioma: |
Inglês |
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Notas: |
International scientific meeting Cassava Biotechonology Network, 1, 1992, Cartajena, Colombia. Proceedinjs... Cali, Colombia: CIAT, 1993. |
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Conteúdo: |
The genus Manihot comprises about 98 species, 22 of which are available in IITA's collection. These are being used to broaden the gene pool avaliable to the cassava breeding unit. All the species, including cassava (M. esculenta Crantz), have a chromosome number of 2x = 36 and form 18 bivalents at probase-1 and metaphase-1(M-1). Wide hybridization with cassava as well as between wild species using 12 of the available Manihot species was effected . The contrasting parental characters showed partial to total dominance in the F1 hybrids. Attempts were made to identify the chromosomes individually in the species usingKaryomorphological criteria. Most bivolents were identifiable from characteristics such as telechromomeres such as telechromomeres, distrivution of heterochromatin, association with nucleolus etc. This was especially about 10 bivalents. Chromosomal similarities and differences based on their karyomorphology at pachytene stage in different Maninhot species were established. Through chromosomal pairing in the F1 hybrids, the homoelogous partners were identified. A general decrease in the chiasma frequency at M-1 in the F, was observed compared to parents. The presence of chromosomal structural differences was revealed by non-pairingof chromosomes, anaphase 1 bridges and fragments etc. Pollen fertility of the F1 hybrids chromosomes, anaphase 1 bridges and fragments etc. Pollen fertility of the F1 hybrids varied considerably. |
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Palavras-Chave: |
Congresso; Hibridos. |
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Thesagro: |
Citogenética; Mandioca; Melhoramento. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02173naa a2200241 a 4500
001 1644367
005 1994-04-18
008 1993 bl uuuu u00u1 u #d
100 1 $aBAI, K. V.
245 $aCytogenetics of Manihot species and interspecific hybrids
260 $c1993
300 $a51-56p
490 $aCIAT, Working Document, 123
500 $aInternational scientific meeting Cassava Biotechonology Network, 1, 1992, Cartajena, Colombia. Proceedinjs... Cali, Colombia: CIAT, 1993.
520 $aThe genus Manihot comprises about 98 species, 22 of which are available in IITA's collection. These are being used to broaden the gene pool avaliable to the cassava breeding unit. All the species, including cassava (M. esculenta Crantz), have a chromosome number of 2x = 36 and form 18 bivalents at probase-1 and metaphase-1(M-1). Wide hybridization with cassava as well as between wild species using 12 of the available Manihot species was effected . The contrasting parental characters showed partial to total dominance in the F1 hybrids. Attempts were made to identify the chromosomes individually in the species usingKaryomorphological criteria. Most bivolents were identifiable from characteristics such as telechromomeres such as telechromomeres, distrivution of heterochromatin, association with nucleolus etc. This was especially about 10 bivalents. Chromosomal similarities and differences based on their karyomorphology at pachytene stage in different Maninhot species were established. Through chromosomal pairing in the F1 hybrids, the homoelogous partners were identified. A general decrease in the chiasma frequency at M-1 in the F, was observed compared to parents. The presence of chromosomal structural differences was revealed by non-pairingof chromosomes, anaphase 1 bridges and fragments etc. Pollen fertility of the F1 hybrids chromosomes, anaphase 1 bridges and fragments etc. Pollen fertility of the F1 hybrids varied considerably.
650 $aCitogenética
650 $aMandioca
650 $aMelhoramento
653 $aCongresso
653 $aHibridos
700 1 $aASIEDU, R.
700 1 $aDIXON, A. G. O.
773 $tCali, Colombia, CIAT 1993
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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