Genetic diversity and disease control in rice

  title={Genetic diversity and disease control in rice},
  author={Youyong Zhu and Hairu Chen and Jing Fan and Yunyue Wang and Yan Li and Jianbin Chen and Jin Xiang Fan and Shisheng Yang and Li-sheng Hu and Hei Leung and Tom W. Mew and Paul Teng and Zonghua Wang and Christopher C Mundt},
Crop heterogeneity is a possible solution to the vulnerability of monocultured crops to disease. Both theory and observation indicate that genetic heterogeneity provides greater disease suppression when used over large areas, though experimental data are lacking. Here we report a unique cooperation among farmers, researchers and extension personnel in Yunnan Province, China—genetically diversified rice crops were planted in all the rice fields in five townships in 1998 and ten townships in 1999… 
Agricultural Biodiversity for Crop Disease and Pest Management
This chapter systematically elaborates on the key technologies and successful examples of the application of these principles of the three levels of biodiversity to disease and pest control, and deals with intercropping patterns with different crop species to control pests and diseases.
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To achieve sustainability of rice production in Asia, the authors need a rice production system built upon effective resistant varieties with broad resilience to a range of diseases and insect pests, and much more can be done to integrate these two approaches to achieve results in farmers’ fields.
Cultivating Biodiversity for Disease Control, A Case Study in China
Diversifying Rice varieties for controlling the disease called Blast in farmers’ field were assessed. Large-scale field tests for two consecutive years showed that the highly susceptible glutinous
Genetic diversity for sustainable rice blast management in China: adoption and impact
Keywords: Disease management, genetic diversity, rice interplanting, competition, resource complementarity, technical efficiency, production function, Magnaporthe grisea The experience on rice blast
Multi-genotype varieties reduce rice diseases through enhanced genetic diversity and show stability and adaptability in the field
Rice is a crucial food crop worldwide. The genetic diversity in rice germplasm indicates its promising potential utilization in disease and pest control. To explore the relationship between genetic
Optimizing Plant Disease Management in Agricultural Ecosystems Through Rational In-Crop Diversification
Biodiversity plays multifaceted roles in societal development and ecological sustainability. In agricultural ecosystems, using biodiversity to mitigate plant diseases has received renewed attention
Does genetic diversity of grass improve yield, digestibility, and resistance to weeds, pests and disease infection?
No significant difference was found in the first and third yields in terms of stability, dry matter digestibility, and leaf damage by insects, although the number of leaves damaged by insects for mixed culture was less than half of that on average for monoculture.
Genotypically diverse cultivar mixtures for insect pest management and increased crop yields
The objective is to review the literature documenting the benefits of genotypic diversity for natural and agricultural ecosystems and synthesize the evidence in support of intraspecific diversity as a viable pest management strategy for insect pests of field crops.
Intra-Species Mixture Alters Pest and Disease Severity in Cotton
species-specific pest responses to the crop mixture provide new insights for optimally sized and configured refuge construction in the future and the effect of the mixture on predator abundance ranged from neutral to positive and was highly variable among species and years.


The Current Status and Prospects of Multiline Cultivars and Variety Mixtures for Disease Resistance
In traditional agricultural systems, cultivation of mixtures within and between species help protect crops against stresses, and mixtures have been or are being cultivated to a much greater extent than is commonly supposed.
Pathogen Variability and Host Resistance in Rice Blast Disease
This review focuses on the host-parasite relationship, which establishes a type of stable resistance, which departs somewhat from conven­ tional thinking, and therefore may be considered controversial.
Breeding Rice for Resistance to Pests
Pest resistance is advantageous in developing countries because there is no cost to farmers and resistant cultivars are easily adopted and disseminated, unlike "knowledge-based" technologies.
Epidemiology in mixed host populations.
Leonard's classic model of the effects of host genotype diversity on disease and its predictions of disease level based on the proportion of susceptible host tissue are discussed.
Genetics and Epidemiological Modeling of Breakdown of Plant Disease Resistance
Systematic plant breeding for disease resistance was begun by introducing a high level of resistance from resistant varieties in the samespecies or from subspecies of the same species, but the resistance of the new varieties was broken down within several years after their release.
The spread oi Erysiphe graminis f. sp. hordei in mixtures of barley varieties
Results obtained from two field trials indicate that the efffect of mixtures may be panitioned into three categories of the influence of the reduced density of the susceptible plants, the barrier effect of the resistant plants, and the induced resistance due to the non-virulent pathogen biotypes.
Selection on Erysiphe graminis in pure and mixed stands of barley
It is argued that host mixtures are unlikely to favour rapid pathogen evolution towards races which are both widely adapted and highly virulent on all component cultivars which they can infect his definition docs not conform with conventional usage in population genetics.
Molecular genetics of plant disease resistance
These findings suggest that plants may have evolved common signal transduction mechanisms for the expression of resistance to a wide range of unrelated pathogens.
Rice blast disease
This text has been developed from a conference held in Madison, Wisconsin, in August 1993, and presents a review of the status of knowledge of the disease and its management.
Agricultural intensification and ecosystem properties.
The use of ecologically based management strategies can increase the sustainability of agricultural production while reducing off-site consequences and have serious local, regional, and global environmental consequences.