Abstract
Durum wheat [Triticum turgidum L. subsp. durum (Desf.) Husn.], used in pasta, couscous, and flatbread production, is an important source of starch food products worldwide. The amylose portion of the starch forms resistant starch complexes that resist digestion and contribute to dietary fiber. Increasing the amount of amylose and resistant starch in wheat by mutating the STARCH BRANCHING ENZYME II (SBEII) genes has potential to provide human health benefits. Ethyl methane sulfonate mutations in the linked SBEIIa and SBEIIb paralogs were combined on chromosomes 2A (SBEIIa/b-A; Reg. No. GP-968, PI 670159), 2B (SBEIIa/b-B; Reg. No. GP-970, PI 670161), and on both chromosomes (SBEIIa/b-AB; Reg. No. GP-969, PI 670160) in the tetraploid wheat cultivar Kronos, a semidwarf durum wheat cultivar that has high yield potential and excellent pasta quality. These three double and quadruple SBEII-mutant lines were compared with a control sib line with no SBEII mutations in two field locations in California. The SBEIIa/b-AB line with four mutations showed dramatic increases in amylose (average 66%) and resistant starch (average 753%) relative to the control. However, the SBEIIa/b-AB line also showed an average 7% decrease in total starch and an 8% decrease in kernel weight. The release by the University of California–Davis of the durum wheat germplasm combining four SBEIIa and SBEIIb mutations will accelerate the deployment of these mutations in durum wheat breeding programs and the development of durum wheat varieties with increased resistant starch.
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Claims 5
Claim · model-written summary
SBEIIa/b-AB increased amylose by an average 66% versus the control.
- Taxon
- Durum Wheat
Triticum turgidum subsp. durumt0 - Material
- SBEIIa/b-ABe0
- Treatment
- four mutationse0
- Gene
- SBEIIa/b-ABe0
- Outcome
- amylosee0
- Direction
- increasese0
- Value
- average 66%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SBEIIa/b-AB line with four mutations showed dramatic increases in amylose (average 66%) and resistant starch (average 753%) relative to the control.”
t0“Durum Wheat”
Claim · model-written summary
SBEIIa/b-AB increased resistant starch by an average 753% versus the control.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Material
- SBEIIa/b-ABe0
- Treatment
- four mutationse0
- Outcome
- resistant starche0
- Direction
- increasese0
- Value
- average 753%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SBEIIa/b-AB line with four mutations showed dramatic increases in amylose (average 66%) and resistant starch (average 753%) relative to the control.”
t0“Durum Wheat”
Claim · model-written summary
SBEIIa/b-AB decreased total starch by an average 7%.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Material
- SBEIIa/b-ABe0
- Treatment
- SBEIIa/b-AB linee0
- Outcome
- total starche0
- Direction
- decreasee0
- Value
- 7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the SBEIIa/b-AB line also showed an average 7% decrease in total starch and an 8% decrease in kernel weight.”
t0“Durum Wheat”
Claim · model-written summary
SBEIIa/b-AB decreased kernel weight by 8%.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Material
- SBEIIa/b-ABe0
- Treatment
- SBEIIa/b-AB linee0
- Outcome
- kernel weighte0
- Direction
- decreasee0
- Value
- 8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the SBEIIa/b-AB line also showed an average 7% decrease in total starch and an 8% decrease in kernel weight.”
t0“Durum Wheat”
Claim · model-written summary
The University of California–Davis released durum wheat germplasm combining four SBEIIa and SBEIIb mutations.
- Taxon
- durum wheatTriticum turgidum subsp. durume0
- Gene
- SBEIIa and SBEIIbe0
- Outcome
- durum wheat germplasm combining four SBEIIa and SBEIIb mutationse0
- Value
- four SBEIIa and SBEIIb mutationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The release by the University of California–Davis of the durum wheat germplasm combining four SBEIIa and SBEIIb mutations will accelerate the deployment of these mutations in durum wheat breeding programs and the development of durum wheat varieties with increased resistant starch.”
The same questions in other papers
loss of function · quality: sugar starch · Triticum turgidum (rivet wheat)Positive and negative results
1 in the opposite direction
- no effect
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.