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Title: The recent evolutionary rescue of a staple crop depended on over half a century of global germplasm exchange

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [2]; ORCiD logo [8]; ORCiD logo [3]; ORCiD logo [9]
  1. Kansas State Univ., Manhattan, KS (United States)
  2. HudsonAlpha Inst. for Biotechnology, Huntsville, AL (United States)
  3. Quisqueya Univ., Port-au-Prince (Haiti)
  4. U.S. Dept. of Agriculture, Stillwater, OK (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Univ. of California, Berkeley, CA (United States)
  7. Donald Danforth Plant Science Center, St. Louis, MO (United States)
  8. HudsonAlpha Inst. for Biotechnology, Huntsville, AL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  9. Kansas State Univ., Manhattan, KS (United States); Colorado State Univ., Fort Collins, CO (United States)

Rapid environmental change can lead to population extinction or evolutionary rescue. The global staple crop sorghum (Sorghum bicolor) has recently been threatened by a global outbreak of an aggressive new biotype of sugarcane aphid (SCA; Melanaphis sacchari). We characterized genomic signatures of adaptation in a Haitian breeding population that had rapidly adapted to SCA infestation, conducting evolutionary population genomics analyses on 296 Haitian lines versus 767 global accessions. Genome scans and geographic analyses suggest that SCA adaptation has been conferred by a globally rare East African allele of RMES1, which spread to breeding programs in Africa, Asia, and the Americas. De novo genome sequencing revealed potential causative variants at RMES1. Markers developed from the RMES1 sweep predicted resistance in eight independent commercial and public breeding programs. These findings demonstrate the value of evolutionary genomics to develop adaptive trait technology and highlight the benefits of global germplasm exchange to facilitate evolutionary rescue.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1891480
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 6 Vol. 8; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Genotyping-by-sequencing data for a Haitian sorghum breeding program dataset January 2021
Genotyping-by-sequencing data for a Haitian sorghum breeding program dataset January 2021