Characterization of Cowpea [ Vigna Unguiculata ( L, ) Walp, ] Genotypes Using Morphological Characters and Chemical Tests [ with CD Copy ]. PDF Download
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![Characterization of Cowpea [ Vigna Unguiculata ( L, ) Walp, ] Genotypes Using Morphological Characters and Chemical Tests [ with CD Copy ]. PDF](https://books.google.com/books/content/images/frontcover/w1S2YgEACAAJ?fife=w150-h200)
Author: Swami B. Vivekananda
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Languages : en
Pages :
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![Characterization of Cowpea [ Vigna Unguiculata ( L, ) Walp, ] Genotypes Using Morphological Characters and Chemical Tests [ with CD Copy ]. PDF](https://books.google.com/books/content/images/frontcover/w1S2YgEACAAJ?fife=w80-h100)
Author: Swami B. Vivekananda
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Languages : en
Pages :
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Author: Deepa Tcrdal
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Languages : en
Pages : 144
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Author: B.H Sunitha
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Category :
Languages : en
Pages : 105
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![Principal Component Analysis for Yield and Its Attributing Traits in Grain Cowpea [Vigna Unguiculata (L.) Walp.]. [With CD Copy] PDF](https://books.google.com/books/content/images/frontcover/HfdezwEACAAJ?fife=w80-h100)
Author: Annu
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Languages : en
Pages : 0
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![Genetic Diversity Analysis for Yield Attributes and Quality Traits of Cowpea [Vigna Unguiculata (L.) Walp-] [With CD Copy] PDF](https://books.google.com/books/content/images/frontcover/SwnUzgEACAAJ?fife=w80-h100)
Author: Phyu phyu Oo
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Languages : en
Pages : 57
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Author: ANJANA G
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Category :
Languages : en
Pages : 86
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![Molecular Characterization and Genetic Divergence Analysis in Cowpea ( Vigna Unguiculata L. Walp. ) Using Rapd Markers [ with CD Copy ]. PDF](https://books.google.com/books/content/images/frontcover/bCNgewAACAAJ?fife=w80-h100)
Author: Suruchi
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Languages : en
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Author: NAGARAJ K. M
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Languages : en
Pages : 72
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![Developing Screening Tools for Abiotic Stresses Using Cowpea [Vigna Unguiculata (L.) Walp.] as a Model Crop PDF](https://books.google.com/books/content/images/frontcover/yD-KswEACAAJ?fife=w80-h100)
Author: Shardendu Kumar Singh
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Category : Cowpea
Languages : en
Pages :
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Abiotic stresses cause extensive loss to agriculture production worldwide. Cowpea is an important legume crop grown widely in tropical and subtropical regions where high temperature, ultraviolet-B (UVB) radiation and drought are the common stress factors limiting production. Various vegetative, physiological, biochemical and reproductive plant attributes were assessed under a range of UVB radiation levels in Experiment I and in a combination with two doses of each carbon dioxide concentration [CO2], temperature, and UVB radiation and their interactions in Experiment II by using six cowpea genotypes and sunlit plant growth chambers. The dynamics of photosynthesis and fluorescence processes were assessed in 15 cowpea genotypes under drought condition in Experiment III in pot-grown plants under sunlit conditions. A distinct response pattern was not observed in cowpea in response to UVB radiation from 0 to 15 kJ; however, plants grown under elevated UVB showed reduced photosynthesis resulting in shorter plants and produced smaller flowers and lower seed yield. Increased phenolic compounds appeared to be a defense response to UVB radiation. The growth enhancements observed by doubling of [CO2] were not observed when plants were grown in combination with elevated UVB or temperature which also showed the most detrimental effects on plant growth and seed yield. Results from Experiment I and II revealed that cowpea reproductive traits were highly sensitive to abiotic stresses compared to the vegetative growth and development. A total stress response index (TSRI) technique, derived from all vegetative and reproductive parameters, was used to screen genotypes for their stress tolerance to UVB or combination of stresses. An increase in water use efficiency while maintaining higher rate of photosynthesis was an important drought tolerance mechanism in tolerant cowpea genotypes. Using principal component analysis technique, four groups of the genotypes were identified for their drought tolerance. Evaluating same genotypes across stress conditions revealed that no single genotype has the absolute tolerance characters to all stress conditions. The identified diversity for abiotic stress tolerance among cowpea genotypes and associated traits can be used to develop tolerant genotypes suitable for an agro-ecological niche though traditional breeding or genetic engineering methods.
Author: Mubarak A Sali
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Category :
Languages : en
Pages : 0
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