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Expression of rolB in apomictic Hieracium piloselloides Vill. causes ectopic meristems in planta and changes in ovule formation, where apomixis initiates at higher frequency.
Koltunow AM, Johnson SD, Lynch M, Yoshihara T, Costantino P. Koltunow AM, et al. Among authors: johnson sd. Planta. 2001 Dec;214(2):196-205. doi: 10.1007/s004250100612. Planta. 2001. PMID: 11800383
A reference genetic linkage map of apomictic Hieracium species based on expressed markers derived from developing ovule transcripts.
Shirasawa K, Hand ML, Henderson ST, Okada T, Johnson SD, Taylor JM, Spriggs A, Siddons H, Hirakawa H, Isobe S, Tabata S, Koltunow AM. Shirasawa K, et al. Among authors: johnson sd. Ann Bot. 2015 Mar;115(4):567-80. doi: 10.1093/aob/mcu249. Epub 2014 Dec 22. Ann Bot. 2015. PMID: 25538115 Free PMC article.
Asexual Female Gametogenesis Involves Contact with a Sexually-Fated Megaspore in Apomictic Hieracium.
Juranić M, Tucker MR, Schultz CJ, Shirley NJ, Taylor JM, Spriggs A, Johnson SD, Bulone V, Koltunow AM. Juranić M, et al. Among authors: johnson sd. Plant Physiol. 2018 Jul;177(3):1027-1049. doi: 10.1104/pp.18.00342. Epub 2018 May 29. Plant Physiol. 2018. PMID: 29844228 Free PMC article.
Generation of an integrated Hieracium genomic and transcriptomic resource enables exploration of small RNA pathways during apomixis initiation.
Rabiger DS, Taylor JM, Spriggs A, Hand ML, Henderson ST, Johnson SD, Oelkers K, Hrmova M, Saito K, Suzuki G, Mukai Y, Carroll BJ, Koltunow AM. Rabiger DS, et al. Among authors: johnson sd. BMC Biol. 2016 Oct 6;14(1):86. doi: 10.1186/s12915-016-0311-0. BMC Biol. 2016. PMID: 27716180 Free PMC article.
Enlarging cells initiating apomixis in Hieracium praealtum transition to an embryo sac program prior to entering mitosis.
Okada T, Hu Y, Tucker MR, Taylor JM, Johnson SD, Spriggs A, Tsuchiya T, Oelkers K, Rodrigues JC, Koltunow AM. Okada T, et al. Among authors: johnson sd. Plant Physiol. 2013 Sep;163(1):216-31. doi: 10.1104/pp.113.219485. Epub 2013 Jul 17. Plant Physiol. 2013. PMID: 23864557 Free PMC article.
Genetic separation of autonomous endosperm formation (AutE) from the two other components of apomixis in Hieracium.
Ogawa D, Johnson SD, Henderson ST, Koltunow AM. Ogawa D, et al. Among authors: johnson sd. Plant Reprod. 2013 Jun;26(2):113-23. doi: 10.1007/s00497-013-0214-y. Epub 2013 Mar 8. Plant Reprod. 2013. PMID: 23471494
Sporophytic ovule tissues modulate the initiation and progression of apomixis in Hieracium.
Tucker MR, Okada T, Johnson SD, Takaiwa F, Koltunow AM. Tucker MR, et al. Among authors: johnson sd. J Exp Bot. 2012 May;63(8):3229-41. doi: 10.1093/jxb/ers047. Epub 2012 Feb 29. J Exp Bot. 2012. PMID: 22378948 Free PMC article.
Chromosomes carrying meiotic avoidance loci in three apomictic eudicot Hieracium subgenus Pilosella species share structural features with two monocot apomicts.
Okada T, Ito K, Johnson SD, Oelkers K, Suzuki G, Houben A, Mukai Y, Koltunow AM. Okada T, et al. Among authors: johnson sd. Plant Physiol. 2011 Nov;157(3):1327-41. doi: 10.1104/pp.111.181164. Epub 2011 Sep 6. Plant Physiol. 2011. PMID: 21896890 Free PMC article.
Sexual reproduction is the default mode in apomictic Hieracium subgenus Pilosella, in which two dominant loci function to enable apomixis.
Koltunow AM, Johnson SD, Rodrigues JC, Okada T, Hu Y, Tsuchiya T, Wilson S, Fletcher P, Ito K, Suzuki G, Mukai Y, Fehrer J, Bicknell RA. Koltunow AM, et al. Among authors: johnson sd. Plant J. 2011 Jun;66(5):890-902. doi: 10.1111/j.1365-313X.2011.04556.x. Epub 2011 Apr 26. Plant J. 2011. PMID: 21418351
Apomixis in hawkweed: Mendel's experimental nemesis.
Koltunow AM, Johnson SD, Okada T. Koltunow AM, et al. Among authors: johnson sd. J Exp Bot. 2011 Mar;62(5):1699-707. doi: 10.1093/jxb/err011. Epub 2011 Feb 18. J Exp Bot. 2011. PMID: 21335438 Review.
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