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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: |
19/08/2013 |
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Autoria: |
HINSON, K. |
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Título: |
Use of a long juvenile trait in cultivar development. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
In: Pascale, A. (Ed.). World Soybean Research Conference, 4., 5 to 9 March 1989, Buenos Aires, Argentina. Proceedings... , p. 983-987, 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
A genotype in the U.S. soybean, Glycine max (L.) Merrill, germplasm collection has a non-conventional response to photoperiod. It was introduces into the U.S. from Peru in 1947 and is identified as PI 159925. In May sowings at Stoneville, Mississippi (33o20' latitude), it is classified as maturity group 8. Maturity group 8 cultivars are best adapted near 30o latitude in the USA. At latitudes below about 27o, or in late sowings near 30o, they flower too soon and consequently make inadequate vegetative growth for good production. Under these same conditions, however, PI 159925 is similar to maturity group 9 or 10 genotypes in length of life cycle and amount of vegetative growth. This characteristics was recognized by germplasm curator E. E. Hartwig as a potential mechanism for adapting cultivar to broader ranges in latitude and sowing date. Early research with the trait was done by Hartwig and coworkers at Stoneville, Mississippi. Hartwig and Kiihl (1979) transferred the trait in F2 populations of moderate size. They suggested that inheritance was controlled by as few as three genes. August sowings, to simulate low-latitude photoperiods, were used to classify contrasting plant types. In May sowings, plants produced insufficient differences for easy classification. Therefore, they described the trait as "delayed flowering under short-day conditions". |
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Thesagro: |
Melhoramento; Soja. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01833naa a2200145 a 4500
001 1838319
005 2013-08-19
008 1989 bl --- 0-- u #d
100 1 $aHINSON, K.
245 $aUse of a long juvenile trait in cultivar development.
260 $c1989
520 $aA genotype in the U.S. soybean, Glycine max (L.) Merrill, germplasm collection has a non-conventional response to photoperiod. It was introduces into the U.S. from Peru in 1947 and is identified as PI 159925. In May sowings at Stoneville, Mississippi (33o20' latitude), it is classified as maturity group 8. Maturity group 8 cultivars are best adapted near 30o latitude in the USA. At latitudes below about 27o, or in late sowings near 30o, they flower too soon and consequently make inadequate vegetative growth for good production. Under these same conditions, however, PI 159925 is similar to maturity group 9 or 10 genotypes in length of life cycle and amount of vegetative growth. This characteristics was recognized by germplasm curator E. E. Hartwig as a potential mechanism for adapting cultivar to broader ranges in latitude and sowing date. Early research with the trait was done by Hartwig and coworkers at Stoneville, Mississippi. Hartwig and Kiihl (1979) transferred the trait in F2 populations of moderate size. They suggested that inheritance was controlled by as few as three genes. August sowings, to simulate low-latitude photoperiods, were used to classify contrasting plant types. In May sowings, plants produced insufficient differences for easy classification. Therefore, they described the trait as "delayed flowering under short-day conditions".
650 $aMelhoramento
650 $aSoja
773 $tIn: Pascale, A. (Ed.). World Soybean Research Conference, 4., 5 to 9 March 1989, Buenos Aires, Argentina. Proceedings... , p. 983-987, 1989.
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Registro original: |
Embrapa Trigo (CNPT) |
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