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The genetic architecture of biomechanical traits in sorghum

Journal Article · · Crop Science
DOI:https://doi.org/10.1002/csc2.20049· OSTI ID:1803390
 [1];  [2];  [2];  [3];  [2]
  1. Texas A & M Univ., College Station, TX (United States); Univ. of Minnesota, St. Paul, MN (United States); OSTI
  2. Texas A & M Univ., College Station, TX (United States)
  3. Cornell Univ., Ithaca, NY (United States)
Sorghum bicolor (L.) Moench is the fifth most commonly grown cereal crop worldwide with unrivaled drought tolerance compared with other cereal crops. Drought and heat tolerance and high biomass yield potential make sorghum a promising bioenergy crop. However, stem lodging is a significant problem that results in substantial yield losses. Stem biomechanical traits influence the mechanical stability of crops and breeding for desirable biomechanical traits may result in improved lodging resistance. In this study, we report the identification of quantitative trait loci (QTL) for stem mechanical and morphological traits in three recombinant inbred line (RIL; populations from Tx623/Rio, Tx623/Della, and Tx631/Della) crosses between elite grain and sweet sorghum parents. The genetic architecture of stem biomechanical traits in the three RIL populations is multigenic and pleiotropic. Additionally, eight QTL affecting mechanical and morphological traits were detected; two main effects of these QTL were consistently found in all populations and colocated with previously identified dwarfing genes Dw1 and Dw3. These results indicate that dwarfing genes affect the mechanical properties of sorghum stems and their lodging resistance, while also having demonstrable effects on stem morphology. The identification of these QTL provides new opportunities for improving stem lodging resistance via genomics-assisted breeding.
Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0018409
OSTI ID:
1803390
Alternate ID(s):
OSTI ID: 1603748
Journal Information:
Crop Science, Journal Name: Crop Science Journal Issue: 1 Vol. 60; ISSN 0011-183X
Publisher:
Alliance of Crop, Soil, and Environmental Science SocietiesCopyright Statement
Country of Publication:
United States
Language:
English

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