Variation and Segregation for Rachis Fragility in Spelt Wheat, Triticum Spelta L.
Variation and Segregation for Rachis Fragility in Spelt Wheat, Triticum Spelta L.
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DOI：
10.1007/s10722-004-7068-y
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发表时间：
2006-02
影响因子：
2
通讯作者：
I. Ōnishi;A. Hongo;Tetsuo Sasakuma;T. Kawahara;Kenji Kato;H. Miura
中科院分区：
文献类型：
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作者：
I. Ōnishi;A. Hongo;Tetsuo Sasakuma;T. Kawahara;Kenji Kato;H. Miura
斯佩尔特小麦，已被证明是丰富的有用基因的来源，对生物和非生物胁迫的耐受性和粮食品质。但这种作物有一些不良性状，包括颖片韧性和脆轴。花序轴的自由伸长和减少的脆弱性是非常重要的栽培性状。在本研究中的目的是调查在广泛的斯佩耳特小麦种质轴脆性的遗传变异，检查其遗传分离模式，并澄清如果轴脆性与非整倍体系的面包小麦染色体5A的剂量。结果表明，斯卑尔脱小麦种质具有广泛的轴韧性，因此，选择具有理想性状和适当坚韧韧性水平的斯卑尔脱小麦是可能的。F2代植株的穗形态分为三种类型：方头、speltoid和speltoid。具有类圆形穗的F2植株具有最脆的穗轴，其次是类圆形穗和方头穗的F2植株。面包小麦的轴脆度也存在遗传变异，并与5A染色体的数量有关。
Spelt wheat,Triticum speltaL., has been proved to be rich-sources of useful genes for tolerance to biotic and abiotic stress, and grain quality. But this crop plant has some undesirable traits including glume tenacity and brittle rachis. Free-threshing and reduced fragility of rachis are very important traits for cultivation. The objectives in the present study were to investigate genetic variation of rachis fragility in a wide range of spelt accessions, to examine its genetic segregation pattern, and to clarify if rachis fragility is associated with dosage of chromosome 5A in aneuploid lines of bread wheat. The results demonstrated that spelt germplasm contains a wide range of rachis toughness, and thus selection of spelt wheat with desirable characteristics combined with an appropriate level of tough rachis would be possible. Spike morphology in the F2plants was segregated into the three types, square-headed, speltoid, and compactoid. The F2plants with compactoid spikes had the most brittle rachis, followed by the speltoid and square-headed spike F2plants. Rachis fragility in bread wheat also had genetic variation and was associated with dosage of chromosome 5A.