Marker-assisted selection strategy to pyramid two or more QTLs for quantitative trait-grain yield under drought

Rice
Arvind KumarNoraziyah Abd Aziz Shamsudin

Abstract

Marker-assisted breeding will move forward from introgressing single/multiple genes governing a single trait to multiple genes governing multiple traits to combat emerging biotic and abiotic stresses related to climate change and to enhance rice productivity. MAS will need to address concerns about the population size needed to introgress together more than two genes/QTLs. In the present study, grain yield and genotypic data from different generations (F3 to F8) for five marker-assisted breeding programs were analyzed to understand the effectiveness of synergistic effect of phenotyping and genotyping in early generations on selection of better progenies. Based on class analysis of the QTL combinations, the identified superior QTL classes in F3/BC1F3/BC2F3 generations with positive QTL x QTL and QTL x background interactions that were captured through phenotyping maintained its superiority in yield under non-stress (NS) and reproductive-stage drought stress (RS) across advanced generations in all five studies. The marker-assisted selection breeding strategy combining both genotyping and phenotyping in early generation significantly reduced the number of genotypes to be carried forward. The strategy presented in this study provid...Continue Reading

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Citations

Jan 21, 2020·Journal of Integrative Plant Biology·Chaolei LiuZhenyu Gao
Apr 2, 2019·Frontiers in Plant Science·Rongsheng WangShaoyang Lin
Aug 4, 2019·International Journal of Molecular Sciences·Kalaivani Nadarajah, Ilakiya Sharanee Kumar
May 8, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Gayatri GoudaLambodar Behera
Feb 27, 2020·International Journal of Molecular Sciences·Yoonha KimKyung-Hwan Kim

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Methods Mentioned

BETA
transgenic
genotyping

Software Mentioned

MAS
SAS

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