Evaluation of Lines Derived from Wild Emmer Chromosome Substitutions: I. Quality Traits

Abstract

Grain protein quality (gluten strength) and quantity affect the quality of pasta extruded from durum wheat (Triticum turgidum L. var. durum) semolina. Previously, an accession of wild emmer (Triticum turgidum L. var. dicoccoides) with high protein concentration was used to develop a complete set of ‘Langdon’ (T. dicoccoides) [LDN(DIC)] substitution lines. This study was conducted to evaluate the potential of using these LDN(DIC) substitution lines as parents for deriving lines with increased grain protein concentration and acceptable gluten strength. Each of the 14 substitution lines and Langdon parent were crossed to a common male parent, ‘Vic’. Parents and F2:4 and F2:5 lines were grown in replicated trials at two locations in North Dakota in 1989 and 1991. Grain protein concentration and sodium dodecyl sulfate (SDS) sedimentation volume were measured. Population means and genetic variances were compared with those of the Langdon/Vic population to identify substitution lines that conferred improved quality characteristics, and to determine their potential use in a breeding program. Heritabilities were estimated from standard‐unit parentoffspring regression and from variance components. LDN(DIC) chromosome substitution populations 1A, 6A, 5B, and 6B were significantly higher than the Longdon/Vic population in grain protein concentration. One population, LDN(DIC) 1B, was significantly higher in sedimentation volume than the Langdon/Vic population. The results indicated that selected LDN(DIC) substitution lines, especially LDN(DIC) 5B and 6B, when crossed to a strong gluten parent, may be useful in deriving lines with increased protein quantity and quality.

Mapping genes for grain protein concentration and grain yield on chromosome 5B of Triticum turgidum (L.) var. dicoccoides

“…dicoccoides chromosomes 2A, 3A, and 5B had increased kernel weight. These results were later confirmed by Steiger et al (1996), who crossed the complete set of Triticum turgidum (L.) var. dicoccoides chromosome substitution lines in LDN to the durum cultivar 'Vic'.…”

Major quality trait analysis and QTL detection in hexaploid wheat in humid rain-fed agriculture

“…These dough rheological traits may be influenced by their placement in specific regions of chromosomes 1A and 1B (Nelson et al, 2006). A number of reports have identified GPC QTL on various chromosomes, and they have all detected at least one GPC QTL on chromosome 6B (Joppa and Cantrell, 1990;Blanco et al, 1996;Steiger et al, 1996;Olmos et al, 2003;Prasad et al, 2003;Distelfeld et al, 2004;Turner et al, 2004). Prasad et al (2003) identified 2 GPC QTL on 6Bs, one of which linked to marker xgwm133-6B.…”

Swedish Spring Wheat Varieties with the Rare High Grain Protein Allele of NAM-B1 Differ in Leaf Senescence and Grain Mineral Content

“…durum ) - wild emmer wheat substitution lines [5], [6] and later the gene has been mapped more precisely [7]. The effects of the locus on grain protein concentration have been shown in several tetraploid wheat backgrounds [8]–[10] and in hexaploid wheats [10]–[13]. The wildtype (wt) allele of NAM-B1 originating in emmer wheat codes for a NAC-domain protein, a group of proteins known to be transcription factors involved in plant development processes.…”