Planta (2017) 246:377–388 DOI 10.1007/s00425-017-2694-8 ORIGINAL ARTICLE The changes in the reproductive barrier between hexaploid wheat (Triticum aestivum L.) and rye (Secale cereale L.): different states lead to different fates 1,2 2 2 2 • • • • Natalia Tikhenko Twan Rutten Angelika Senula Myroslava Rubtsova 2 2 E. R. Joachim Keller Andreas Bo ¨ rner Received: 31 January 2017 / Accepted: 12 April 2017 / Published online: 19 April 2017 Springer-Verlag Berlin Heidelberg 2017 Abstract this hybrid lethality. Normal and abnormal embryos were Main conclusion The changes in the reproductive bar- observed to build embryogenic calli and produce regener- rier between hexaploid wheat (Triticum aestivum L.) ated plantlets in a similar manner. The high regenerative and rye (Secale cereale L.) can be induced using in situ capacity of the abnormal embryos led us to conclude that embryo rescue of abnormal embryos, yielding the reproductive barrier in these intergeneric hybrids may stable fertile amphidiploid plants. have an epigenetic origin that can be easily overcome by culturing immature embryos via callus induction. After In intergeneric crosses between hexaploid wheat (Triticum colchicine treatment during callus culture, amphidiploid aestivum L.) and rye (Secale cereale L.), postzygotic bar- plants were obtained. However, most
Planta – Springer Journals
Published: Apr 19, 2017
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