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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 698810 | Kronos-Wapo-A1b | Triticum turgidum L. subsp. durum (Desf.) van Slageren | California, United States | NSGC |  | | 2021 | DEVELOPED | | | | | | Genetic material | Wild type Kronos is a high yielding durum wheat line with a spring growth habit and excellent pasta quality. It
carries the Wapo-A1a allele (= Haplotype 1) characterized by a 115-bp deletion in the promoter and the amino acid polymorphism D384N. Kuzay et al. (2019) demonstrated that the H2 haplotype was associated with a higher number of spikelets per spike than the H1 aplotype in multiple populations. A 2021 field study including BC3F3 sister linesfor the H2 and H1 haplotypes showed that H2 was associated with a 17.6% (P < 0.001) increase in spikelet number per spike and a 6.1% increase (P = 0.046) in the number of grains per spike. The apo-A1b allele (H2 haplotype) is very rare in modern durum wheats, so this germplasm is particularly useful to introgress the Wapo-A1b allele in durum breeding programs. The H2 haplotype is present at high frequency in some modern common wheat breeding programs. | 2116450 | PI 698810 |