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- W984195955 abstract "This chapter elaborates the genotypic variation in crop plant root systems. Genetic improvement of crop species, however, requires knowledge of intraspecies variability in significant root parameters and its genetic control. Ecological studies provide many examples of plant root systems, adapted to cope with variability in major edaphic environmental factors such as temperature and water. Vertical distribution of root dry matter illustrated that some species were better adapted to rooting in the shallow soil near the surface while others exploited crevices in the underlying limestone. It is found that many landraces of rice adapted to rain-fed culture exhibit substantially larger root systems with some large-diameter roots extending into the plow pan and deeper soil levels. Rain-fed agricultural ecosystems range from no-input mixed cropping of shifting cultivators on marginal soils to complex soil, water, and fertility management systems rivaling irrigated areas in production. It is found that when root pruning was performed in the field to simulate stress or mechanical damage to nodal roots, the inbreds with early vigorous seminal root development showed less reduction in height and ear weight. The analysis of means and variances indicated considerable heritable variation from crosses between tall and semidwarf height groups." @default.
- W984195955 created "2016-06-24" @default.
- W984195955 creator A5015084437 @default.
- W984195955 creator A5015733898 @default.
- W984195955 date "1987-01-01" @default.
- W984195955 modified "2023-10-13" @default.
- W984195955 title "Genotypic Variation in Crop Plant Root Systems" @default.
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