School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom.
Crop Genetics, John Innes Centre, Norwich, United Kingdom.
PLoS One. 2020 Feb 28;15(2):e0229107. doi: 10.1371/journal.pone.0229107. eCollection 2020.
A diverse panel of 245 wheat genotypes, derived from crosses between landraces from the Watkins collection representing global diversity in the early 20th century and the modern wheat cultivar Paragon, was grown at two field sites in the UK in 2015-16 and the concentrations of zinc and iron determined in wholegrain using inductively coupled plasma-mass spectrometry (ICP-MS). Zinc concentrations in wholegrain varied from 24-49 mg kg-1 and were correlated with iron concentration (r = 0.64) and grain protein content (r = 0.14). However, the correlation with yield was low (r = -0.16) indicating little yield dilution. A sub-set of 24 wheat lines were selected from 245 wheat genotypes and characterised for Zn and Fe concentrations in wholegrain and white flour over two sites and years. White flours from 24 selected lines contained 8-15 mg kg-1 of zinc, which was positively correlated with the wholegrain Zn concentration (r = 0.79, averaged across sites and years). This demonstrates the potential to exploit the diversity in landraces to increase the concentration of Zn in wholegrain and flour of modern high yielding bread wheat cultivars.
一个由 245 个小麦基因型组成的多样化小组，这些基因型是由沃特金斯收集的 20 世纪初代表全球多样性的地方品种与现代小麦品种“帕拉贡”之间的杂交产生的，于 2015-2016 年在英国的两个田间试验点种植，并使用电感耦合等离子体质谱法（ICP-MS）测定全谷物中的锌和铁浓度。全谷物中的锌浓度从 24-49mg/kg 不等，与铁浓度（r=0.64）和谷物蛋白质含量（r=0.14）相关。然而，与产量的相关性较低（r=-0.16），表明产量稀释程度较小。从 245 个小麦基因型中选择了 24 个小麦品系作为亚组，并在两个地点和两年内对全谷物和白面粉中的 Zn 和 Fe 浓度进行了特征描述。24 个选定品系的白面粉中含有 8-15mg/kg 的锌，与全谷物的 Zn 浓度呈正相关（r=0.79，平均跨地点和年份）。这表明有可能利用地方品种的多样性来提高现代高产面包小麦品种全谷物和面粉中锌的浓度。
