Effects of Freezing Temperature on Sorghum [Sorghum Bicolor (L.) Moench] Seed Differing in Moisture Content PDF Download
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![Effects of Freezing Temperature on Sorghum [Sorghum Bicolor (L.) Moench] Seed Differing in Moisture Content PDF](https://books.google.com/books/content/images/frontcover/X7ZwNwAACAAJ?fife=w150-h200)
Author: Carlos Pieta Filho
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ISBN:
Category : Seeds
Languages : en
Pages : 88
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![Effects of Freezing Temperature on Sorghum [Sorghum Bicolor (L.) Moench] Seed Differing in Moisture Content PDF](https://books.google.com/books/content/images/frontcover/X7ZwNwAACAAJ?fife=w80-h100)
Author: Carlos Pieta Filho
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ISBN:
Category : Seeds
Languages : en
Pages : 88
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Author: C. Pieta Filho
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Estudo abrangente da deterioracao sequencial em campo de 5 linhas "B" de sorgo granifero usado na producao de hibrido de sorgo. A ocorrencia de uma geada que destruiu a viabilidade da semente depois de apenas 3 de 34 colheitas terem sido feitas, o que impediu a conclusao do experimento inicial. O segundo experimento foi conduzido para investigar o efeito da geada na semente de sorgo com diferentes teores de umidade.
Author: Mitchell Memorial Library
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ISBN:
Category :
Languages : en
Pages : 1184
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![Effect of Drying Air Temperature on Germination of Sorghum [Sorghum Bicolor (L.) Moench] Seeds PDF](https://books.google.com/books/content/images/frontcover/s8MNOAAACAAJ?fife=w80-h100)
Author: Ladda Viriyangkura
Publisher:
ISBN:
Category : Sorghum
Languages : en
Pages : 146
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Author: Frank Maulana
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ISBN:
Category :
Languages : en
Pages :
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Cold temperature stress is an important abiotic constraint to grain sorghum production in temperate regions. In the United States, low temperature in late spring and early fall has limited sorghum production to a narrow growing period. Deployment of cold tolerance traits may widen this window and hence contribute to increased production. The objectives of this study were (1) to determine the effect of early and mid-season cold temperature stress on growth, phenology and yield components of sorghum, and identify key traits that are most sensitive to cold stress at seedling and flowering stages, and (2) to identify new sources of cold tolerance for use in breeding programs. Series of controlled environment (greenhouse/growth chamber) and field experiments were carried out. Three sorghum genotypes of variable response, Shan Qui Red (tolerant), SRN39 (susceptible) and Pioneer 84G62 (unknown) were subjected to cold (15/13°C day/night) and normal (25/23°C day/night) temperature at seedling (Experiment I) and flowering (Experiment II) stages. The genotypes were planted in a greenhouse using a 5L polytainer pots. Each pot consisted of a single plant and each plot was represented by three pots. A split-plot design with three replications was used in both experiments with temperature regimes as main plots and genotypes as sub-plots. Three days after emergence, experiment I plants were moved to the growth chamber and subjected to the designated temperature treatments. For experiment II, the treatments were assigned at heading stage immediately before anthesis had begun. The treatments lasted 10 d in both experiments. Data were collected on seedling characteristics and leaf chlorophyll content in experiment I, days to flowering, maturity, and yield components in both experiments, and anthesis duration in experiment II. For the field experiment, 150 sorghum germplasm collections of potential cold tolerance along with tolerant and susceptible checks were evaluated for emergence and seedling traits under early planting (April 13) at soil temperature of 20.1/13.4 °C max/min. The normal temperature treatment was applied by planting at regular season (May 26) at soil temperature of 30.0/20.4°C max/min. Twenty-four genotypes selected based on field emergence and seedling vigor were further screened under controlled environment. Early-season stress significantly reduced leaf chlorophyll content, all seedling traits (height, vigor and dry weight), and also delayed flowering and maturity. But it had no effect on final leaf number, plant height and yield components. Genotypic response to early stress was significant for all traits with the susceptible checks having the lowest score for all seedling traits. Mid-season cold stress prolonged anthesis duration, delayed maturity and highly reduced all yield components. Several genotypes among the 150 had higher seedling vigor and emergence than the tolerant check, Shan Qui Red. In conclusion, reduced seedling vigor as a result of early stress had no effect on final yield provided that stand establishment was not compromised while mid season stress is damaging to yield. The wide genetic variation for the traits indicates the potential for improvement of cold tolerance in sorghum.
Author:
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ISBN:
Category : Hydrology
Languages : en
Pages :
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Author: C.P. Camargo
Publisher:
ISBN:
Category :
Languages : en
Pages : 74
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Seed of 36 sorghum (Sorghum bicolor (L.) Moench) geneotypes selected on the basis of high physiological quality were evaluated to determine genotypic differences in response to germination temperatures ranging from 10 to 42C. Seed of high, medium, and low quality were evaluated to investigate seed quality-germination-tempearture relationships. Seed of 24 genotypes were dimensionally sized and permitted to imbile water to evaluate both genotypic variation in speed of water uptake and the influence of seed size on water imbibition. Sorghum seed of near maximum phusiological quality germinated equally well at temperatures between 20 and 30C. Among the range of genotypes evaluated, constant germination temperatures of 14 and 42C were the best for screening genotypes for their to germinate at low and high temperatures, respectively. Two genotypes, IS 1166C and SC 175-14, were equal to or better than all other genotypes at all germination temperatures evaluated. Five genotypes, E 35-1, MN 1958, MN 4508, IS 12685C and TPDXB1388 (9256) were very sensitive to germination temperatures outside the optimal range. Seed of lower physilogical quality were more sensitive to germination temperatures than those of high quality. However, there was a differential response among the genotypes. Regardless of genotype, small seed increased in moisture content more rapidly than large seed when water supply was not limited. Within the same size. there was genotypic varation both in the rate of moisture absorption and the time (...).
![Cold Tolerance of Sorghum [Sorghum Bicolor (L.) Moench] During Germination and Early Seedling Growth PDF](https://books.google.com/books/content/images/frontcover/hg34NwAACAAJ?fife=w80-h100)
Author: Anne Alegre de la Soujeole
Publisher:
ISBN:
Category : Sorghum
Languages : en
Pages : 218
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![Interaction of Soil Moisture Content and Extra-optimal Temperature on Germination and Emergence of Sorghum [Sorghum Bicolor (L.) Moench] PDF](https://books.google.com/books/content/images/frontcover/OTsgOAAACAAJ?fife=w80-h100)
Author: Jose Rozalvo Andrigueto
Publisher:
ISBN:
Category : Soil moisture
Languages : en
Pages : 124
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Author: Ahmed A. Aziz
Publisher:
ISBN:
Category : Seeds
Languages : en
Pages : 160
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