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利用硬粒小麦的遗传多样性和含 D 基因组的 Aegilops 物种生产合成小麦品系，以用于小麦育种。

Production of synthetic wheat lines to exploit the genetic diversity of emmer wheat and D genome containing Aegilops species in wheat breeding.

机构信息

Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Kurdistan, P. O. Box: 416, Sanandaj, Iran.

Department of Horticultural Sciences, Faculty of Agriculture, University of Kurdistan, P. O. Box: 416, Sanandaj, Iran.

出版信息

Sci Rep. 2020 Nov 12;10(1):19698. doi: 10.1038/s41598-020-76475-7.

DOI:10.1038/s41598-020-76475-7
PMID:33184344
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7661528/
Abstract

Due to the accumulation of various useful traits over evolutionary time, emmer wheat (Triticum turgidum subsp. dicoccum and dicoccoides, 2n = 4x = 28; AABB), durum wheat (T. turgidum subsp. durum, 2n = 4x = 28; AABB), T. timopheevii (2n = 4x = 28; AAGG) and D genome containing Aegilops species offer excellent sources of novel variation for the improvement of bread wheat (T. aestivum L., AABBDD). Here, we made 192 different cross combinations between diverse genotypes of wheat and Aegilops species including emmer wheat × Ae. tauschii (2n = DD or DDDD), durum wheat × Ae. tauschii, T. timopheevii × Ae. tauschii, Ae. crassa × durum wheat, Ae. cylindrica × durum wheat and Ae. ventricosa × durum wheat in the field over three successive years. We successfully recovered 56 different synthetic hexaploid and octaploid F lines with AABBDD, AABBDDDD, AAGGDD, DDXXAABB, DDCCAABB and DDNNAABB genomes via in vitro rescue of F embryos and spontaneous production of F seeds on the F plants. Cytogenetic analysis of F lines showed that the produced synthetic wheat lines were generally promising stable amphiploids. Contribution of D genome bearing Aegilops and the less-investigated emmer wheat genotypes as parents in the crosses resulted in synthetic amphiploids which are a valuable resource for bread wheat breeding.

摘要

由于在进化过程中积累了各种有用的性状，硬粒小麦（Triticum turgidum subsp. dicoccum 和 dicoccoides，2n=4x=28；AABB）、杜伦小麦（T. turgidum subsp. durum，2n=4x=28；AABB）、提莫菲维小麦（T. timopheevii，2n=4x=28；AAGG）和含有 D 基因组的 Aegilops 物种为改良普通小麦（T. aestivum L.，AABBDD）提供了极好的新型变异来源。在这里，我们在田间进行了 192 种不同的小麦基因型和 Aegilops 物种的杂交组合，包括硬粒小麦×Ae. tauschii（2n=DD 或 DDDD）、杜伦小麦×Ae. tauschii、提莫菲维小麦×Ae. tauschii、Ae. crassa×杜伦小麦、Ae. cylindrica×杜伦小麦和 Ae. ventricosa×杜伦小麦，连续三年进行杂交。我们成功地通过体外拯救 F 胚胎和 F 植株上 F 种子的自发产生，从 F 代中回收了 56 种不同的具有 AABBDD、AABBDDDD、AAGGDD、DDXXAABB、DDCCAABB 和 DDNNAABB 基因组的合成六倍体和八倍体 F 系。F 系的细胞遗传学分析表明，所产生的合成小麦系通常是有前途的稳定双二倍体。携带 D 基因组的 Aegilops 和研究较少的硬粒小麦基因型作为亲本在杂交中的贡献导致了合成双二倍体，这是普通小麦育种的宝贵资源。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/3a280a8f8291/41598_2020_76475_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/91cc05229171/41598_2020_76475_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/e9b035ae4c99/41598_2020_76475_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/274f76b85d11/41598_2020_76475_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/906114e6e210/41598_2020_76475_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/344e09aeaf1b/41598_2020_76475_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/4673f031565b/41598_2020_76475_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/eee5a0020132/41598_2020_76475_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/3a280a8f8291/41598_2020_76475_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/91cc05229171/41598_2020_76475_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/e9b035ae4c99/41598_2020_76475_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/274f76b85d11/41598_2020_76475_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/906114e6e210/41598_2020_76475_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/344e09aeaf1b/41598_2020_76475_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/4673f031565b/41598_2020_76475_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/eee5a0020132/41598_2020_76475_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/888a/7661528/3a280a8f8291/41598_2020_76475_Fig8_HTML.jpg

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