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Research paper | Open Access

Selection efficiencies for improving drought/salt tolerances and yield using introgression breeding in rice (Oryza sativa L.)

Ying WangLubiao ZhangAfif NafisahLinghua ZhuJianlong Xu( )Zhikang Li( )
Institute of Crop Science, The National Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Peer review under the responsibility of Crop Science Society of China and Institute of Crop Science, CAAS.

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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, 189 Huang-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.

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The Crop Journal
Pages 134-142
Cite this article:
Wang Y, Zhang L, Nafisah A, et al. Selection efficiencies for improving drought/salt tolerances and yield using introgression breeding in rice (Oryza sativa L.). The Crop Journal, 2013, 1(2): 134-142. https://doi.org/10.1016/j.cj.2013.07.006

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Received: 11 March 2013
Revised: 15 May 2013
Accepted: 28 May 2013
Published: 17 July 2013
© 2013 Crop Science Society of China and Institute of Crop Science, CAAS.
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