TY - JOUR
T1 - Ancestral QTL alleles from wild emmer wheat improve drought resistance and productivity in modern wheat cultivars
AU - Merchuk-Ovnat, Lianne
AU - Barak, Vered
AU - Fahima, Tzion
AU - Ordon, Frank
AU - Lidzbarsky, Gabriel A.
AU - Krugman, Tamar
AU - Saranga, Yehoshua
N1 - Publisher Copyright:
© 2016 Merchuk-Ovnat, Barak, Fahima, Ordon, Lidzbarsky, Krugman and Saranga.
PY - 2016/4/15
Y1 - 2016/4/15
N2 - Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is considered a promising source for improving stress resistances in domesticated wheat. Here we explored the potential of selected quantitative trait loci (QTLs) from wild emmer wheat, introgressed via marker-assisted selection, to enhance drought resistance in elite durum (T. turgidumssp. durum) and bread (T. aestivum) wheat cultivars. The resultant near-isogenic lines (BC3F3 and BC3F4) were genotyped using SNP array to confirm the introgressed genomic regions and evaluated in two consecutive years under well-watered (690–710 mm) and water-limited (290–320 mm) conditions. Three of the introgressed QTLs were successfully validated, two in the background of durum wheat cv. Uzan (on chromosomes 1BL and 2BS), and one in the background of bread wheat cvs. Bar Nir and Zahir (chromosome 7AS). In most cases, the QTL x environment interaction was validated in terms of improved grain yield and biomass—specifically under drought (7AS QTL in cv. Bar Nir background), under both treatments (2BS QTL), and a greater stability across treatments (1BL QTL). The results provide a first demonstration that introgression of wild emmer QTL alleles can enhance productivity and yield stability across environments in domesticated wheat, thereby enriching the modern gene pool with essential diversity for the improvement of drought resistance.
AB - Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is considered a promising source for improving stress resistances in domesticated wheat. Here we explored the potential of selected quantitative trait loci (QTLs) from wild emmer wheat, introgressed via marker-assisted selection, to enhance drought resistance in elite durum (T. turgidumssp. durum) and bread (T. aestivum) wheat cultivars. The resultant near-isogenic lines (BC3F3 and BC3F4) were genotyped using SNP array to confirm the introgressed genomic regions and evaluated in two consecutive years under well-watered (690–710 mm) and water-limited (290–320 mm) conditions. Three of the introgressed QTLs were successfully validated, two in the background of durum wheat cv. Uzan (on chromosomes 1BL and 2BS), and one in the background of bread wheat cvs. Bar Nir and Zahir (chromosome 7AS). In most cases, the QTL x environment interaction was validated in terms of improved grain yield and biomass—specifically under drought (7AS QTL in cv. Bar Nir background), under both treatments (2BS QTL), and a greater stability across treatments (1BL QTL). The results provide a first demonstration that introgression of wild emmer QTL alleles can enhance productivity and yield stability across environments in domesticated wheat, thereby enriching the modern gene pool with essential diversity for the improvement of drought resistance.
KW - Interspecific introgression
KW - Marker-assisted selection
KW - Near-isogenic line
KW - Quantitative trait locus
KW - Triticum turgidum ssp. dicoccoides
KW - Water stress
KW - Wheat
KW - Yield
UR - http://www.scopus.com/inward/record.url?scp=84964262411&partnerID=8YFLogxK
U2 - 10.3389/fpls.2016.00452
DO - 10.3389/fpls.2016.00452
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AN - SCOPUS:84964262411
SN - 1664-462X
VL - 7
JO - Frontiers in Plant Science
JF - Frontiers in Plant Science
IS - APR2016
M1 - 452
ER -
