Full TGIF Record # 333425
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Web URL(s):https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/150710
    Last checked: 12/01/2023
Publication Type:
Content Type:Abstract or Summary only
Author(s):Gaire, Susmita; Yu, Xingwang; Gouveia, Beatriz T.; Carbajal Melgar, Esdras Manuel; Austin, Robert; Milla-Lewis, Susana R.
Author Affiliation:Gaire: Presenting Author and North Carolina State University, Raleigh, NC; Yu: Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC; Gouveia: Biology, North Carolina State University, Raleigh, NC; Carbajal Melgar: North Carolina State University, Raleigh, NC; Austin: Crop and Soil Sciences, North Carolina State University, Raleigh, NC; Milla-Lewis: Crop Science, North Carolina State University, Raleigh, NC
Title:QTL analysis for winter survival in a 'Raleigh' St. Augustinegrass pseudo-F2 mapping population
Section:Turfgrass physiology, molecular biology, breeding, genetic and microbiome poster (includes student competition)
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C05 turfgrass science
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Meeting Info.:St. Louis, Missouri: October 29-November 1, 2023
Source:ASA, CSSA, SSSA International Annual Meeting. 2023, p. 150710.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Despite the favorable traits like shade tolerance and low input requirements, cultivating St. Augustinegrass, a warm-season perennial turfgrass, in transitional climates like North Carolina is challenging due to its poor freeze tolerance. In addition, climate change-induced winter temperature fluctuations worsen adaptation and survival by affecting acclimation and de-acclimation processes. Genetic diversity within the St. Augustinegrass germplasm pool offers the potential for enhancing freeze tolerance, nonetheless, these resources have yet to be fully exploited in breeding programs. Previous studies identified quantitative trait loci (QTL) associated with freeze tolerance in the 'Raleigh' X 'Seville' mapping population. However, these genetic regions need validation in different populations and environments. This study aims to discover and confirm QTL linked to cold acclimation and winter survival in a pseudo-F2 population of the freeze-tolerant cultivar 'Raleigh'. The 184 progenies and four controls (Raleigh, Seville, Palmetto, and CitraBlue) were planted at the Upper Mountain Research Station (Laurel Springs, NC) in August 2021, July 2022, and May 2023. Phenotypic data for the establishment, winterkill, and fall color were collected visually. Establishment data was also collected using an unmanned aerial system (UAS). A strong correlation (r=0.859) was found between UAS and visual establishment data. Genotype by environment interaction was highly significant for all traits, indicating the differential effect of year on genotypes for our traits of interest. XSA12121 and XSA11078 were the top breeding lines for winter survival across the years (winter 21/22 and 22/23). A genomic library for genotyping by sequencing was prepared and sequenced. The next step involves creating a genetic linkage map, identifying freeze tolerance QTL, and validating them with previously identified QTL. This study aims to provide valuable insights into improving freeze tolerance in St. Augustinegrass, ultimately enhancing its adaptability for transitional zones and colder climates."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gaire, S., X. Yu, B. T. Gouveia, E. M. Carbajal Melgar, R. Austin, and S. R. Milla-Lewis. 2023. QTL analysis for winter survival in a 'Raleigh' St. Augustinegrass pseudo-F2 mapping population. Agron. Abr. p. 150710.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=333425
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    Last checked: 12/01/2023
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