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Ancestral QTL alleles from wild emmer wheat improve grain yield, biomass and photosynthesis across enviroinments in modern wheat
- Source :
- Plant Science. 251:23-34
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is considered a promising source for improving drought resistance in domesticated wheat. Nevertheless, wild germplasm has not been widely used in wheat breeding for abiotic stress resilience. In the current study, a near isogenic line NIL-7A-B-2, introgressed with a drought-related QTL from wild emmer wheat on chromosome 7A, and its recurrent parent, bread wheat cv. BarNir, were investigated under four environments across 2 years-water-limited and well-watered conditions in a rain-protected screen-house (Year 1) and two commercial open field plots under ample precipitation (Year 2). NIL-7A-B-2 exhibited an advantage over BarNir in grain yield and biomass production under most environments. Further physiological analyses suggested that enhanced photosynthetic capacity and photochemistry combined with higher flag leaf area are among the factors underlying the improved productivity of NIL-7A-B-2. These were coupled with improved sink capacity in NIL-7A-B-2, manifested by greater yield components than its parental line. This study provides further support for our previous findings that introgression of wild emmer QTL alleles, using marker assisted selection, can enhance grain yield and biomass production across environments in domesticated wheat, thereby enriching the modern gene pool with essential diversity for the improvement of yield and drought resistance.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Germplasm
Quantitative Trait Loci
Introgression
Plant Science
Biology
01 natural sciences
03 medical and health sciences
Genetics
Biomass
Photosynthesis
Domestication
Alleles
Triticum
Biomass (ecology)
Abiotic stress
fungi
Genetic Variation
food and beverages
Gene Pool
General Medicine
Marker-assisted selection
Photosynthetic capacity
030104 developmental biology
Agronomy
Gene pool
Agronomy and Crop Science
010606 plant biology & botany
Subjects
Details
- ISSN :
- 01689452
- Volume :
- 251
- Database :
- OpenAIRE
- Journal :
- Plant Science
- Accession number :
- edsair.doi.dedup.....b7b17681941eb6c0e15594baed6039bc