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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 | | |
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| 0 | PI 701905 | Kronos-PS | Triticum turgidum L. subsp. durum (Desf.) van Slageren | California, United States | NSGC |  | | 2023 | DEVELOPED | | | | | | Genetic material | Kronos is a spring wheat that carries a functional Vrn-A1 allele for spring growth habit (Vrn-A1c allele), a functional Vrn-B2 long day repressor locus (genes ZCCT-B2a and ZCCT-B2b), and the Ppd-A1a allele for reduced photoperiodic response. We developed a near-isogenic Kronos line carrying the wild-type photoperiod-sensitive Ppd-A1b allele (Kronos-PS), which flowers very late under short day and approximately five days later than the photoperiod insensitive Kronos under long days (Pearce et al. 2017). This line was developed by crossing Kronos with the tetraploid durum variety Langdon (which carries the Ppd-A1b allele) followed by three backcrosses to Kronos as the recurrent parent, self-pollination, and selection of homozygous plants with molecular markers. The seeds provided here are BC3F4 seeds homozygous for the Ppd-A1b allele and were used in additional studies where they were combined with mutations in co1 and co2 (Shaw et al. 2020), and with mutation sin elf3 and phyB (Alvarez et al. 2022). | 2141272 | PI 701905 |