tailieunhanh - Mega–environment concept in agriculture: A review

Greater emphasis on future constraints to agricultural production is motivated by the projections of environmental change. The speed of population, change in climate and environmental has pressurized the crop community to understand the importance of those stresses which may result in the significant declines in yield. Advances in data availability, advance information technology, and new and improved methods to target genotypes to environments have benefited the crop improvement practices. No methodology is found in literature which integrates factors like climate, soil, land cover etc., and can predict the most suitable environment (Area) for growing maize based on its genetic variability. Megaenvironment can be defined as a part, which may not necessarily be contiguous, of growing region of any species of a particular crop, with homogeneous environment which encourages similar genotypes to perform best. The MEs (homogeneous environments of production delineated on the basis of an agroclimatic) are helpful to the crop breeders in managing the genotype-byenvironment interactions and then extrapolate the same within similar agro climatic areas. In this paper several research works are reviewed to provide emphasis on the Mega-Environment concept for crop improvement. | International Journal of Current Microbiology and Applied Sciences ISSN 2319-7706 Volume 8 Number 01 2019 Journal homepage http Review Article https Mega-Environment Concept in Agriculture A Review Debdali Chowdhury Anshu Bharadwaj and . Sehgal Indian Agricultural Research Institute Pusa campus New-Delhi 110012 India Corresponding author ABSTRACT Keywords Mega-environment Agriculture Homogeneous Genotype-by-environment interactions Article Info Accepted 14 December 2018 Available Online 10 January 2019 Greater emphasis on future constraints to agricultural production is motivated by the projections of environmental change. The speed of population change in climate and environmental has pressurized the crop community to understand the importance of those stresses which may result in the significant declines in yield. Advances in data availability advance information technology and new and improved methods to target genotypes to environments have benefited the crop improvement practices. No methodology is found in literature which integrates factors like climate soil land cover etc. and can predict the most suitable environment Area for growing maize based on its genetic variability. Megaenvironment can be defined as a part which may not necessarily be contiguous of growing region of any species of a particular crop with homogeneous environment which encourages similar genotypes to perform best. The MEs homogeneous environments of production delineated on the basis of an agro-climatic are helpful to the crop breeders in managing the genotype-by-environment interactions and then extrapolate the same within similar agro climatic areas. In this paper several research works are reviewed to provide emphasis on the Mega-Environment concept for crop improvement. Introduction Agriculture for decades had been associated with the production of basic food crops. About 70 of Indian population is directly engaged in .

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