Dataset Information

Harnessing genetic potential of wheat germplasm banks through impact-oriented-prebreeding for future food and nutritional security.

ABSTRACT: The value of exotic wheat genetic resources for accelerating grain yield gains is largely unproven and unrealized. We used next-generation sequencing, together with multi-environment phenotyping, to study the contribution of exotic genomes to 984 three-way-cross-derived (exotic/elite1//elite2) pre-breeding lines (PBLs). Genomic characterization of these lines with haplotype map-based and SNP marker approaches revealed exotic specific imprints of 16.1 to 25.1%, which compares to theoretical expectation of 25%. A rare and favorable haplotype (GT) with 0.4% frequency in gene bank identified on chromosome 6D minimized grain yield (GY) loss under heat stress without GY penalty under irrigated conditions. More specifically, the 'T' allele of the haplotype GT originated in Aegilops tauschii and was absent in all elite lines used in study. In silico analysis of the SNP showed hits with a candidate gene coding for isoflavone reductase IRL-like protein in Ae. tauschii. Rare haplotypes were also identified on chromosomes 1A, 6A and 2B effective against abiotic/biotic stresses. Results demonstrate positive contributions of exotic germplasm to PBLs derived from crosses of exotics with CIMMYT's best elite lines. This is a major impact-oriented pre-breeding effort at CIMMYT, resulting in large-scale development of PBLs for deployment in breeding programs addressing food security under climate change scenarios.

SUBMITTER: Singh S

PROVIDER: S-EPMC6104032 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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Harnessing genetic potential of wheat germplasm banks through impact-oriented-prebreeding for future food and nutritional security.

Singh Sukhwinder S Vikram Prashant P Sehgal Deepmala D Burgueño Juan J Sharma Achla A Singh Sanjay K SK Sansaloni Carolina P CP Joynson Ryan R Brabbs Thomas T Ortiz Cynthia C Solis-Moya Ernesto E Govindan Velu V Gupta Naveen N Sidhu Harminder S HS Basandrai Ashwani K AK Basandrai Daisy D Ledesma-Ramires Lourdes L Suaste-Franco Maria P MP Fuentes-Dávila Guillermo G Moreno Javier I JI Sonder Kai K Singh Vaibhav K VK Singh Sanjay S Shokat Sajid S Arif Mian A R MAR Laghari Khalil A KA Srivastava Puja P Bhavani Sridhar S Kumar Satish S Pal Dharam D Jaiswal Jai P JP Kumar Uttam U Chaudhary Harinder K HK Crossa Jose J Payne Thomas S TS Imtiaz Muhammad M Sohu Virinder S VS Singh Gyanendra P GP Bains Navtej S NS Hall Anthony A Pixley Kevin V KV

Scientific reports 20180821 1

The value of exotic wheat genetic resources for accelerating grain yield gains is largely unproven and unrealized. We used next-generation sequencing, together with multi-environment phenotyping, to study the contribution of exotic genomes to 984 three-way-cross-derived (exotic/elite1//elite2) pre-breeding lines (PBLs). Genomic characterization of these lines with haplotype map-based and SNP marker approaches revealed exotic specific imprints of 16.1 to 25.1%, which compares to theoretical expec ...[more]

PMID: 30131572

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Dataset Information

Harnessing genetic potential of wheat germplasm banks through impact-oriented-prebreeding for future food and nutritional security.

Publications

Harnessing genetic potential of wheat germplasm banks through impact-oriented-prebreeding for future food and nutritional security.

Similar Datasets

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