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Development of Perennial Grain Sorghum

Author

Listed:
  • Stan Cox

    (The Land Institute, Salina, KS 67401, USA)

  • Pheonah Nabukalu

    (The Land Institute, Salina, KS 67401, USA)

  • Andrew H. Paterson

    (Plant Genome Mapping Laboratory, University of Georgia, Athens, GA 30605 USA)

  • Wenqian Kong

    (Plant Genome Mapping Laboratory, University of Georgia, Athens, GA 30605 USA)

  • Shakirah Nakasagga

    (Department of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USA, sn1@tamu.edu)

Abstract

Perennial germplasm derived from crosses between Sorghum bicolor and either S. halepense or S. propinquum is being developed with the goal of preventing and reversing soil degradation in the world’s grain sorghum-growing regions. Perennial grain sorghum plants produce subterranean stems known as rhizomes that sprout to form the next season’s crop. In Kansas, breeding perennial sorghum involves crossing S. bicolor cultivars or breeding lines to S. halepense or perennial S. bicolor n × S. halepense breeding lines, selecting perennial plants from F 2 or subsequent populations, crossing those plants with S. bicolor , and repeating the cycle. A retrospective field trial in Kansas showed that selection and backcrossing during 2002–2009 had improved grain yields and seed weights of breeding lines. Second-season grain yields of sorghum lines regrowing from rhizomes were similar to yields in the first season. Further selection cycles have been completed since 2009. Many rhizomatous lines that cannot survive winters in Kansas are perennial at subtropical or tropical locations in North America and Africa. Grain yield in Kansas was not correlated with rhizomatousness in either Kansas or Uganda. Genomic regions affecting rhizome growth and development have been mapped, providing new breeding tools. The S. halepense gene pool may harbor many alleles useful for improving sorghum for a broad range of traits in addition to perenniality.

Suggested Citation

  • Stan Cox & Pheonah Nabukalu & Andrew H. Paterson & Wenqian Kong & Shakirah Nakasagga, 2018. "Development of Perennial Grain Sorghum," Sustainability, MDPI, vol. 10(1), pages 1-8, January.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:1:p:172-:d:126640
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    References listed on IDEAS

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    1. Timothy E. Crews & Douglas J. Cattani, 2018. "Strategies, Advances, and Challenges in Breeding Perennial Grain Crops," Sustainability, MDPI, vol. 10(7), pages 1-7, June.
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    Cited by:

    1. Anna Westerbergh & Estelle Lerceteau-Köhler & Mohammad Sameri & Girma Bedada & Per-Olof Lundquist, 2018. "Towards the Development of Perennial Barley for Cold Temperate Climates—Evaluation of Wild Barley Relatives as Genetic Resources," Sustainability, MDPI, vol. 10(6), pages 1-16, June.
    2. Alejandra Vilela & Luciana González-Paleo & Kathryn Turner & Kelsey Peterson & Damián Ravetta & Timothy E. Crews & David Van Tassel, 2018. "Progress and Bottlenecks in the Early Domestication of the Perennial Oilseed Silphium integrifolium , a Sunflower Substitute," Sustainability, MDPI, vol. 10(3), pages 1-23, February.
    3. Timothy E. Crews & Douglas J. Cattani, 2018. "Strategies, Advances, and Challenges in Breeding Perennial Grain Crops," Sustainability, MDPI, vol. 10(7), pages 1-7, June.
    4. Sandile Birthwell Ndwandwe & Ruey-Chee Weng, 2018. "Competitive Analyses of the Pig Industry in Swaziland," Sustainability, MDPI, vol. 10(12), pages 1-22, November.

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