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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo; Embrapa Soja. |
Data corrente: |
10/10/1994 |
Data da última atualização: |
10/10/1994 |
Autoria: |
PARENTONI, S. N. |
Título: |
Mapping quantitative trait loci for maturity and correlated traits in maize using RFLP markers. |
Ano de publicação: |
1993 |
Fonte/Imprenta: |
[S.l.]: University of Minnesota, 1993. |
Páginas: |
76p. |
Idioma: |
Inglês |
Notas: |
M.Sc. Thesis. |
Conteúdo: |
RFLP markers were used to map quantitative trait loci for maturity and correlated traits in maize. A linkage map was obtained forhe cross A662 X B73 using data from 63 RFLP markers. A total of 151 F3 lines from A662 X B73 were evaluated in per se and in testcrosses in three Minnesota locations in 1992. MAPMAKER-QTL was used to analyze the F3 data an single factor ANOVA considering only the two homozygous parental marker classes was used for analyze the testcross data. Five unlinke chromosomal regions (chromosomes 1, 3, 5, 8 and 9) were shown to be associated with early maturity in this cross. A major maturity factor was identified on chromosome 8 close to the marker UMC12. This region was also strongly associated with node number. The maturity regions identi-fied in general were also linked to plant height or to one of the plant height components, suggesting the possibility of pleiotropy. However, our data are not sufficient to distinguish between pleiotropy and tight linkage. Plant height is controlled by both node number and internode length and these last two traits are controlled by different chromosomal regions. No evidence was found for marker class x location interaction. F3 per se evaluation and testcross results showed the same chromosomal regions as important in controlling maturity in the cross studied. Results from the F3 per se analysis agree with the conclusions from a previous study (Kim, 1992) using backcross derived lines from the cross A662 X B 73. |
Palavras-Chave: |
Biology; Fitopatologia; Maize; Mapeamento; Mapping; Marker; Molecular; Phytopatology. |
Thesagro: |
Biologia Molecular; Bioquímica; Biotecnologia; Fisiologia; Marcador Molecular; Melhoramento; Milho; Zea Mays. |
Thesaurus Nal: |
biochemistry; biotechnology; breeding; physiology. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02428nam a2200373 a 4500 001 1459238 005 1994-10-10 008 1993 bl uuuu m 00u1 u #d 100 1 $aPARENTONI, S. N. 245 $aMapping quantitative trait loci for maturity and correlated traits in maize using RFLP markers. 260 $a[S.l.]: University of Minnesota$c1993 300 $a76p. 500 $aM.Sc. Thesis. 520 $aRFLP markers were used to map quantitative trait loci for maturity and correlated traits in maize. A linkage map was obtained forhe cross A662 X B73 using data from 63 RFLP markers. A total of 151 F3 lines from A662 X B73 were evaluated in per se and in testcrosses in three Minnesota locations in 1992. MAPMAKER-QTL was used to analyze the F3 data an single factor ANOVA considering only the two homozygous parental marker classes was used for analyze the testcross data. Five unlinke chromosomal regions (chromosomes 1, 3, 5, 8 and 9) were shown to be associated with early maturity in this cross. A major maturity factor was identified on chromosome 8 close to the marker UMC12. This region was also strongly associated with node number. The maturity regions identi-fied in general were also linked to plant height or to one of the plant height components, suggesting the possibility of pleiotropy. However, our data are not sufficient to distinguish between pleiotropy and tight linkage. Plant height is controlled by both node number and internode length and these last two traits are controlled by different chromosomal regions. No evidence was found for marker class x location interaction. F3 per se evaluation and testcross results showed the same chromosomal regions as important in controlling maturity in the cross studied. Results from the F3 per se analysis agree with the conclusions from a previous study (Kim, 1992) using backcross derived lines from the cross A662 X B 73. 650 $abiochemistry 650 $abiotechnology 650 $abreeding 650 $aphysiology 650 $aBiologia Molecular 650 $aBioquímica 650 $aBiotecnologia 650 $aFisiologia 650 $aMarcador Molecular 650 $aMelhoramento 650 $aMilho 650 $aZea Mays 653 $aBiology 653 $aFitopatologia 653 $aMaize 653 $aMapeamento 653 $aMapping 653 $aMarker 653 $aMolecular 653 $aPhytopatology
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