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Molecular breeding

About: Molecular breeding is a research topic. Over the lifetime, 2120 publications have been published within this topic receiving 56908 citations.


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Ying, Wang, Lubiao, Zhang, Afif, Nafisah, Linghua, Zhu, Jian-long, Xu, Zhi-kang, Li 
01 Jan 2013
TL;DR: Huang et al. as discussed by the authors evaluated 189 Huang-Hua-Zhan (HHZ) introgression lines (ILs) developed from three different selection schemes for yield related traits under drought stress and non-stress conditions in the target and off-season winter nursery environments to assess the selection efficiency of BC breeding for improving different complex traits.
Abstract: The backcross(BC) breeding strategy has been increasingly used for developing high yielding varieties with improved abiotic stress tolerances in rice. In this study, 189Huang-Hua-Zhan(HHZ) introgression lines(ILs) developed from three different selection schemes were evaluated for yield related traits under drought stress and non-stress conditions in the target and off-season winter nursery environments to assess the selection efficiency of BC breeding for improving different complex traits, and led us to five important results. The first result indicated that the primary target traits should be selected first in the target environments(TEs) in order to achieve the maximum genetic gain. Secondly, BC breeding for drought tolerance(DT) in rice was almost equally effective by strong phenotypic selection in the main target environments and in the winter-season of Hainan.Thirdly, exploiting genetic diversity in the subspecific gene pools is of great importance for future genetic improvement of complex traits in rice. Fourthly, considerable genetic gain can be effectively achieved by selection for secondary target traits among the ILs with the primary traits. Finally, the developed ILs provide useful materials for future genetic/genomic dissection and molecular breeding of complex traits.

1 citations

Book ChapterDOI
01 Jan 2013
TL;DR: This chapter describes the recent molecular aspects of plant–pathogen interactions focusing on the nonhost resistance components and strategies like specific regulation of induced defense responses, manipulation of susceptibility factors, and host-induced gene silencing (HIGS) are discussed.
Abstract: Alleviating the crop loss due to biotic stress is the primary aim of plant biologists to achieve sustainable evergreen revolution in order to feed rapidly growing population. In nature, continuous evolution of plants while interacting with pathogens has generated a complex immune system that consists of preformed barriers and induced responses. The induced responses are further subdivided based upon the recognition of microbe-associated molecular patterns and effectors produced by pathogens; however, overlap exists between the downstream signaling pathways. In last decade, great deal of information about molecular aspects of plant–pathogen interactions has been generated which can be utilized for improving crops through genetic manipulation. Plant breeding has helped in the isolation of species-specific resistance components (R genes) from many plants. The molecular breeding techniques have also helped in pyramiding several components to a single variety, especially QTLs responsible for plant resistance, high yield, and nutritional quality. The identification of nonhost components in model plants and incorporation of genetically modified crops in our cropping system have raised hopes that nonhost resistance can be utilized for generating broad-spectrum pathogen tolerance breaking the barriers of species level resistance. This chapter describes the recent molecular aspects of plant–pathogen interactions focusing on the nonhost resistance components. Additionally, strategies like specific regulation of induced defense responses, manipulation of susceptibility factors, and host-induced gene silencing (HIGS) are discussed. The development of GM crops using such strategies will help in generating higher yields against pathogen infestations.

1 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202383
2022153
2021156
2020143
2019169
2018137