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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
26/03/1993 |
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Data da última atualização: |
26/03/1993 |
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Autoria: |
MCKINNEY, N. V.; SCHAPAUGH, W. T.; KANEMASU, E. T. |
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Título: |
Selection for canopy termperature differential in six populations of soybean. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Crop Science, v.29, n.2, p.255-259, 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
Canopy temperature represents a quantitative measurement of a plants response to heat and drought stess. Information is needed concernin thegenetic variability for canopy temperature (Tc) in segreating populations if plant breeders are to effectively maniulate Tc. This study was conducted to characterize genetic variation for canopy temperature in populations of soybean [Glycine max (L.) Merr.] and to assess the effectiveness of selection within the populations for canopy temperature. Parent plants, F 19 and F2 individuals were space planted and a hand-held infrared thermometer was used to monitor plants for Tc on 3 d during late vegetative and early reproductive growth in 1982. Advanced F3 and F3:4 lines from each population were monitored in unreplicated progeny rows for Tc following canopy closure in 1983 and the four warmest (HOT) and four coolest (COOL) F14 lines were selectedfor further study. Selected lines in the F3:6 generation were replicated in 1984 and monitored for Tc. Heritability estimates for seasonal mean canopy temperature differential (Td=canopy temperature-air temperature) based on parent-progeny regression ranged from 1 to 22% for F2 and F3 parent-progeny regression: and 0 to 19% for F3:4 and F3:6 parent-progeny regression. Rank correlations of F3:4 vs. F3:6 lines for Td were significant in three of six populations. The mean Td of the HOT vs. COOL selections measured in 1984 were significantly different in three populations, indicating effective F3:4 selection. Early... MenosCanopy temperature represents a quantitative measurement of a plants response to heat and drought stess. Information is needed concernin thegenetic variability for canopy temperature (Tc) in segreating populations if plant breeders are to effectively maniulate Tc. This study was conducted to characterize genetic variation for canopy temperature in populations of soybean [Glycine max (L.) Merr.] and to assess the effectiveness of selection within the populations for canopy temperature. Parent plants, F 19 and F2 individuals were space planted and a hand-held infrared thermometer was used to monitor plants for Tc on 3 d during late vegetative and early reproductive growth in 1982. Advanced F3 and F3:4 lines from each population were monitored in unreplicated progeny rows for Tc following canopy closure in 1983 and the four warmest (HOT) and four coolest (COOL) F14 lines were selectedfor further study. Selected lines in the F3:6 generation were replicated in 1984 and monitored for Tc. Heritability estimates for seasonal mean canopy temperature differential (Td=canopy temperature-air temperature) based on parent-progeny regression ranged from 1 to 22% for F2 and F3 parent-progeny regression: and 0 to 19% for F3:4 and F3:6 parent-progeny regression. Rank correlations of F3:4 vs. F3:6 lines for Td were significant in three of six populations. The mean Td of the HOT vs. COOL selections measured in 1984 were significantly different in three populations, indicating effective F3:4 sel... Mostrar Tudo |
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Palavras-Chave: |
Resistance; SDD; Soybean. |
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Thesagro: |
Glycine Max; Resistência; Seca; Soja; Temperatura. |
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Thesaurus Nal: |
drought; temperature. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02174naa a2200265 a 4500
001 1073272
005 1993-03-26
008 1989 bl --- 0-- u #d
100 1 $aMCKINNEY, N. V.
245 $aSelection for canopy termperature differential in six populations of soybean.
260 $c1989
520 $aCanopy temperature represents a quantitative measurement of a plants response to heat and drought stess. Information is needed concernin thegenetic variability for canopy temperature (Tc) in segreating populations if plant breeders are to effectively maniulate Tc. This study was conducted to characterize genetic variation for canopy temperature in populations of soybean [Glycine max (L.) Merr.] and to assess the effectiveness of selection within the populations for canopy temperature. Parent plants, F 19 and F2 individuals were space planted and a hand-held infrared thermometer was used to monitor plants for Tc on 3 d during late vegetative and early reproductive growth in 1982. Advanced F3 and F3:4 lines from each population were monitored in unreplicated progeny rows for Tc following canopy closure in 1983 and the four warmest (HOT) and four coolest (COOL) F14 lines were selectedfor further study. Selected lines in the F3:6 generation were replicated in 1984 and monitored for Tc. Heritability estimates for seasonal mean canopy temperature differential (Td=canopy temperature-air temperature) based on parent-progeny regression ranged from 1 to 22% for F2 and F3 parent-progeny regression: and 0 to 19% for F3:4 and F3:6 parent-progeny regression. Rank correlations of F3:4 vs. F3:6 lines for Td were significant in three of six populations. The mean Td of the HOT vs. COOL selections measured in 1984 were significantly different in three populations, indicating effective F3:4 selection. Early...
650 $adrought
650 $atemperature
650 $aGlycine Max
650 $aResistência
650 $aSeca
650 $aSoja
650 $aTemperatura
653 $aResistance
653 $aSDD
653 $aSoybean
700 1 $aSCHAPAUGH, W. T.
700 1 $aKANEMASU, E. T.
773 $tCrop Science$gv.29, n.2, p.255-259, 1989.
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
