Phytic acid is a ubiquitous compound that chelates the micronutrients in food and hinder their absorption. Hence, breeding for low phytate content for producing stable low phytic acid (lpa) hybrids is essential. Phytic acid content in maize grains has been found to vary across environments and its stable expression has yet to be explored. In a view of this, forty inbreds were screened with two checks viz., CO-6 and CO-H(M)-8 across three locations. Twenty morphological and three quality traits were observed to identify the stable lines for low phytic acid with higher free inorganic phosphorous and starch. Among all the lines, UMI-467, LPA-2-285, LPA-2-395 and UMI-447 recorded a stable performance in both AMMI and GGE biplot analysis for low phytic acid (2.52–3.32 mg/g). These lines also had a higher free inorganic phosphorous, ensuring its bioavailability (1.78–1.88 mg/g). There were perturbations in yield, starch and seed characteristics of the stable low phytic acid lines due to their lower phytic acid concentrations. This stated the role of phytic acid in plant physiology and established the constraints to be faced in breeding for low phytic acid in maize. Among the lpa lines, LPA-2-285 (57.83%) and UMI-447 (55.78%) had the highest average starch content. The lowest stable phytic acid content was observed in UMI-467 (2.52 mg/g) and this line had severe reductions in yield parameters. Considering the seed and yield characteristics, LPA-2-285, LPA-2-395 and UMI-447 performed better than UMI-467. Although these four stable lines were poor in their adaptability among all the genotypes, they could be utilised as promising stable donors to facilitate the development of stable lpa hybrids.

中文翻译：

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植酸在玉米（Zea mays。L）基因型中的环境影响，用于鉴定低植酸的稳定近交系。

植酸是一种普遍存在的化合物，会螯合食物中的微量营养素并阻碍其吸收。因此，进行低植酸含量的育种以生产稳定的低植酸（lpa）混合动力至关重要。已经发现玉米籽粒中植酸的含量会随环境而变化，其稳定表达尚待探索。有鉴于此，对40个自交系进行了两次检查，分别在三个位置检查了CO-6和CO-H（M）-8。观察到二十个形态和三个品质性状，鉴定出低植酸和高游离无机磷和淀粉的稳定品系。在所有品系中，UMI-467，LPA-2-285，LPA-2-395和UMI-447在低植酸（2.52-3.32 mg / g）的AMMI和GGE双图分析中均表现出稳定的性能。这些品系还具有较高的游离无机磷，确保了其生物利用度（1.78-1.88 mg / g）。由于植酸浓度低，稳定的低植酸品系的产量，淀粉和种子特性均受到干扰。这说明了植酸在植物生理中的作用，并建立了玉米低植酸育种面临的限制。之间LPA线，LPA-2-285（57.83％）和UMI-447（55.78％）有最高的平均淀粉含量。在UMI-467中观察到最低的稳定植酸含量（2.52 mg / g），该品系的产量参数大幅降低。考虑到种子和产量特性，LPA-2-285，LPA-2-395和UMI-447的性能优于UMI-467。尽管这四个稳定品系在所有基因型中的适应性均较差，但它们可以用作有希望的稳定供体，以促进稳定的lpa杂种的发展。