PDF(Pubmed)
Abstract：
Wheat (Triticum aestivum L.) is inherently low in protein content, Zn and Fe. Boost yield gains have unwittingly reduced grain Zn and Fe, which has had negative impacts on human health. The aim of this study was to understand the inheritance of grain yield per plant and grain Fe, Zn, and protein concentrations in bread wheat (Triticum aestivum L.) under normal and late sown conditions. Half diallel crosses were performed using 10 parents. The crosses and parents were evaluated in replicated trials for the two conditions, to assess the possibility of exploiting heterosis to improve micronutrient contents. The per se performance, heterosis, combining ability, and genetic components were estimated for different characters in both environments. The results revealed that hybrid GW 451 × GW 173 exhibited better parent heterosis (BPH) and standard heterotic effects (SH) in all environments. In both sowing conditions, the general combining ability (GCA) effects of poor × poor parents also showed high specific combining ability (SCA) effects of hybrids for both the micronutrients and protein contents. However, σ2A/σ2D greater than unity confirmed the preponderance of additive gene action for protein content, and GW 173 was identified as a good general combiner for these characteristics under both environments. SCA had positive significant (P < 0.001) correlations with BPH, SH1, SH2, and the phenotype for yield component traits and grain protein, Fe, and Zn concentrations in both conditions. A supplementary approach for biofortifying wheat grainis required to prevent malnutrition.
摘要：
小麦（TriticumaestivumL.）的蛋白质含量本来就很低，Zn和Fe。提高产量增加无意间减少了晶粒锌和铁，这对人类健康产生了负面影响。本研究的目的是了解单株籽粒产量和籽粒铁的遗传，Zn,在正常和晚播条件下，面包小麦（TriticumaestivumL.）中的蛋白质浓度。使用10个亲本进行了半Dialell杂交。在两个条件的重复试验中对杂交和亲本进行了评估，评估利用杂种优势提高微量营养素含量的可能性。本身的性能，杂种优势，结合能力，并估计了两种环境中不同特征的遗传成分。结果表明，杂种GW451×GW173在所有环境中均表现出更好的亲本杂种优势（BPH）和标准杂种优势（SH）。在两种播种条件下，穷人×穷人父母的一般结合能力（GCA）效应也显示出杂种对微量营养素和蛋白质含量的高特异性结合能力（SCA）效应。然而,σ2A/σ2D大于1证实了加性基因作用对蛋白质含量的优势，在这两种环境下，GW173被认为是这些特性的良好通用组合器。SCA与BPH呈显著正相关(P<0.001),SH1，SH2，以及产量构成性状和籽粒蛋白质的表型，Fe,和锌浓度在这两种条件下。需要一种生物强化小麦籽粒的补充方法来防止营养不良。
