Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | e0215515 |
| Fachzeitschrift | PLOS ONE |
| Jahrgang | 14 |
| Ausgabenummer | 4 |
| Frühes Online-Datum | 18 Apr. 2019 |
| Publikationsstatus | Elektronisch veröffentlicht (E-Pub) - 18 Apr. 2019 |
Abstract
Understanding the adaptation mechanisms of sorghum to drought and the underlying genetic architecture may help to improve its production in a wide range of environments. By crossing a high yielding parent (HYP) and a drought tolerant parent (DTP), we obtained 140 recombinant inbred lines (RILs), which were genotyped with 120 DArT and SSR markers covering 14 linkage groups (LGs). A subset of 100 RILs was evaluated three times in control and drought treatments to genetically dissect their response to water availability. Plants with early heading date (HD) in the drought treatment maintained yield (YLD) level by reducing seed number SN and increasing hundred seed weight (HSW). In contrast, early HD in the control treatment increased SN, HSW and YLD. In total, 133 significant QTL associated with the measured traits were detected in ten hotspot regions. Antagonistic, pleiotropic effects of a QTL cluster mapped on LG-6 may explain the observed trade-offs between SN and HSW: Alleles from DTP reduced SN and the alleles from HYP increased HSW under drought stress, but not in the control treatment. Our results illustrate the importance of considering genetic and environmental factors in QTL mapping to better understand plant responses to drought and to improve breeding programs.
ASJC Scopus Sachgebiete
- Biochemie, Genetik und Molekularbiologie (insg.)
- Allgemeine Biochemie, Genetik und Molekularbiologie
- Agrar- und Biowissenschaften (insg.)
- Allgemeine Agrar- und Biowissenschaften
- Allgemein
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in: PLOS ONE, Jahrgang 14, Nr. 4, e0215515, 18.04.2019.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Unraveling the genetic complexity underlying sorghum response to water availability
AU - Phuong, Nguyen
AU - Afolayan, Gloria
AU - Stützel, Hartmut
AU - Uptmoor, Ralf
AU - El-Soda, Mohamed
N1 - Funding Information: We gratefully acknowledge the German Academic Exchange Service (DAAD) and the Ministry for Education and Training, Vietnam for financial support in form of scholarships for GA and NP.
PY - 2019/4/18
Y1 - 2019/4/18
N2 - Understanding the adaptation mechanisms of sorghum to drought and the underlying genetic architecture may help to improve its production in a wide range of environments. By crossing a high yielding parent (HYP) and a drought tolerant parent (DTP), we obtained 140 recombinant inbred lines (RILs), which were genotyped with 120 DArT and SSR markers covering 14 linkage groups (LGs). A subset of 100 RILs was evaluated three times in control and drought treatments to genetically dissect their response to water availability. Plants with early heading date (HD) in the drought treatment maintained yield (YLD) level by reducing seed number SN and increasing hundred seed weight (HSW). In contrast, early HD in the control treatment increased SN, HSW and YLD. In total, 133 significant QTL associated with the measured traits were detected in ten hotspot regions. Antagonistic, pleiotropic effects of a QTL cluster mapped on LG-6 may explain the observed trade-offs between SN and HSW: Alleles from DTP reduced SN and the alleles from HYP increased HSW under drought stress, but not in the control treatment. Our results illustrate the importance of considering genetic and environmental factors in QTL mapping to better understand plant responses to drought and to improve breeding programs.
AB - Understanding the adaptation mechanisms of sorghum to drought and the underlying genetic architecture may help to improve its production in a wide range of environments. By crossing a high yielding parent (HYP) and a drought tolerant parent (DTP), we obtained 140 recombinant inbred lines (RILs), which were genotyped with 120 DArT and SSR markers covering 14 linkage groups (LGs). A subset of 100 RILs was evaluated three times in control and drought treatments to genetically dissect their response to water availability. Plants with early heading date (HD) in the drought treatment maintained yield (YLD) level by reducing seed number SN and increasing hundred seed weight (HSW). In contrast, early HD in the control treatment increased SN, HSW and YLD. In total, 133 significant QTL associated with the measured traits were detected in ten hotspot regions. Antagonistic, pleiotropic effects of a QTL cluster mapped on LG-6 may explain the observed trade-offs between SN and HSW: Alleles from DTP reduced SN and the alleles from HYP increased HSW under drought stress, but not in the control treatment. Our results illustrate the importance of considering genetic and environmental factors in QTL mapping to better understand plant responses to drought and to improve breeding programs.
UR - http://www.scopus.com/inward/record.url?scp=85064525604&partnerID=8YFLogxK
U2 - 10.1371/journal.pone.0215515
DO - 10.1371/journal.pone.0215515
M3 - Article
C2 - 30998785
AN - SCOPUS:85064525604
VL - 14
JO - PLOS ONE
JF - PLOS ONE
SN - 1932-6203
IS - 4
M1 - e0215515
ER -