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Genome-Wide Meta-Analysis of QTLs Associated with Root Traits and Implications for Maize Breeding

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Title Genome-Wide Meta-Analysis of QTLs Associated with Root Traits and Implications for Maize Breeding
Genome-Wide Meta-Analysis of QTLs Associated with Root Traits and Implications for Maize Breeding
 
Creator Krishna Sai Karnatam , Gautam Chhabra , Dinesh Kumar Saini , Rajveer Singh , Gurwinder Kaur , Umesh Preethi Praba , Pankaj Kumar , Simran Goyal , Priti Sharma , Rumesh Ranjan ,SK. Sandhu , Ramesh Kumar and Yogesh Vikal
 
Subject abiotic stress; candidate genes; GWAS; expression analysis; meta-QTLs; root systemarchitecture
 
Description Not Available
Root system architecture (RSA), also known as root morphology, is critical in plant acquisition of soil resources, plant growth, and yield formation. Many QTLs associated with RSA or root traits in maize have been identified using several bi-parental populations, particularly in response to various environmental factors. In the present study, a meta-analysis of QTLs associated with
root traits was performed in maize using 917 QTLs retrieved from 43 mapping studies published
from 1998 to 2020. A total of 631 QTLs were projected onto a consensus map involving 19,714 markers, which led to the prediction of 68 meta-QTLs (MQTLs). Among these 68 MQTLs, 36 MQTLs
were validated with the marker-trait associations available from previous genome-wide association
studies for root traits. The use of comparative genomics approaches revealed several gene models
conserved among the maize, sorghum, and rice genomes. Among the conserved genomic regions,
the ortho-MQTL analysis uncovered 20 maize MQTLs syntenic to 27 rice MQTLs for root traits.
Functional analysis of some high-confidence MQTL regions revealed 442 gene models, which were
then subjected to in silico expression analysis, yielding 235 gene models with significant expression
in various tissues. Furthermore, 16 known genes viz., DXS2, PHT, RTP1, TUA4, YUC3, YUC6, RTCS1,
NSA1, EIN2, NHX1, CPPS4, BIGE1, RCP1, SKUS13, YUC5, and AW330564 associated with various
root traits were present within or near the MQTL regions. These results could aid in QTL cloning
and pyramiding in developing new maize varieties with specific root architecture for proper plant
growth and development under optimum and abiotic stress conditions.
Not Available
 
Date 2024-04-01T11:12:16Z
2024-04-01T11:12:16Z
2023-03-24
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/81731
 
Language English
 
Relation Not Available;
 
Publisher International Journal of Molecular Sciences