Potential Breeding for High Nitrogen Fixation in Pisum sativum L.: Germplasm Phenotypic Characterization and Genetic InvestigationReportar como inadecuado




Potential Breeding for High Nitrogen Fixation in Pisum sativum L.: Germplasm Phenotypic Characterization and Genetic Investigation - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Nitrogen Nis the most yield-limiting crop nutrient worldwide. Industrially produced N hasincreased in cost over the past years, and is unavailable in many regionsaround the globe. Biological N fixation by rhizobial bacteria is a greatunderutilized resource that this project aims to maximize. Grain legumes fixapproximately 20 to 100 kg·N·ha-1·yr-1.The amount of N supplied by fixation is affected by genes and traits of boththe bacterial and plant partners. The objectives of this study are toidentify Pisum sativum varieties withhigh nitrogen fixation efficiency. This is achieved by germplasm screening andphenotypic evaluation of nodule formation, total plant nitrogen, and residualnitrogen in soil. Significant differences in plant total nitrogen among thevarious cultivated genotypes were found, with heritability of 0.57. These peavarieties left in the soil a residual N that varies between 11.21 to 65.018 kg.N.ha-1. Ourfindings reveal a unique opportunity for improving N fixation through geneticcrossing and selection.

KEYWORDS

Nitrogen Fixation; Field Peas; Agricultural Inputs

Cite this paper

R. Abi-Ghanem, E. Bodah, M. Wood and K. Braunwart -Potential Breeding for High Nitrogen Fixation in Pisum sativum L.: Germplasm Phenotypic Characterization and Genetic Investigation,- American Journal of Plant Sciences, Vol. 4 No. 8, 2013, pp. 1597-1600. doi: 10.4236-ajps.2013.48193.





Autor: R. Abi-Ghanem, E. T. Bodah, M. Wood, K. Braunwart

Fuente: http://www.scirp.org/



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