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Title of Journal: Mol Breeding

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Abbravation: Molecular Breeding

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Springer Netherlands

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DOI

10.1002/jlac.1991199101102

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ISSN

1572-9788

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QTL mapping for yield and photosynthetic related t

Authors: YunFeng Xu SiShen Li LiHui Li FeiFei Ma XiaoYi Fu ZhanLiang Shi HongXing Xu PengTao Ma DiaoGuo An
Publish Date: 2017/03/09
Volume: 37, Issue: 3, Pages: 34-
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Abstract

The improvement for drought tolerance requires understanding of the genetic control of wheat Triticum aestivum L reaction to drought In this study a set of 131 recombinant inbred lines of wheat were investigated under wellwatered WW and drought stress DS environments across 2 years to map quantitative trait loci QTLs for yield and physiological traits A total of 225 QTLs were detected including 32 nonenvironmentspecific loci that were significant in both DS and WW one droughtspecific locus and two wateringspecific loci Three consistentlyexpressed QTLs QTkw3A2 QTss1A and QScn7A1 were identified in at least three environments and the QTkw1D1 was significant in DS across the 2 years By unconditional and conditional QTL analysis spike number per plant and kernel number per spike were more important than thousandkernel weight for grain yield GY at the given genetic background Metaanalysis identified 67 metaQTLs that contained QTLs for at least two traits High frequency colocation of QTLs was found among either the spikerelated traits or the six physiological traits Four photosynthesis traits CHL LWUE P N and C i were colocated with GY and/or yield components on various MQTLs The results provided QTLs that warrant further study for drought tolerance breeding and are helpful for understanding the genetic basis of drought tolerance and the genetic contribution of yield components to GY at individual QTL level in wheat

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