Zn and Fe Concentration Variations of Grain and Flag Leaf and the Relationship with NAM-G1 Gene in Triticum timopheevii (Zhuk.) Zhuk. ssp timopheevii
Zn and Fe Concentration Variations of Grain and Flag Leaf and the Relationship with NAM-G1 Gene in Triticum timopheevii (Zhuk.) Zhuk. ssp timopheevii
复制标题
DOI：
10.1556/0806.45.2017.022
复制
发表时间：
2017-09-01
影响因子：
1.6
通讯作者：
Zheng, Y. L.
中科院分区：
文献类型：
--
作者：
Hu, X. G.;Liu, J.;Zheng, Y. L.
对12份提莫菲维小麦（Triticum timopheevii（Zhuk.）祝SSP.对种植两年的timopheevii（AAGG，2n = 4x = 28）和一个面包小麦品种中国春（CS）和一个硬粒小麦品种Langdon（LDN）的籽粒铁（Fe）和锌（Zn）含量进行了分析。12个供试T.蒂莫菲维亚亚种timopheevii基因型籽粒中Fe和Zn含量显著高于CS和LDN。铁、锌含量在不同群体间存在丰富的遗传变异。蒂莫菲维亚亚种timopheevii的平均含量分别为47.06~90.26 mg kg（-1）和30.05~65.91 mg kg（-1）。籽粒铁、锌含量年际间呈显著正相关，相关系数分别为r = 0.895和r = 0.891，遗传稳定性较高。剑叶中Fe和Zn含量均比籽粒高2~3倍，二者之间呈极显著正相关，相关系数分别为r = 0.648和r = 0.957，表明剑叶可间接评价籽粒中Zn和Fe含量。籽粒铁、锌含量之间以及籽粒锌含量与株高、穗粒数两个农艺性状之间均存在显著相关。这两个浓度与种子大小、重量以及NAM-G1基因无关，表明T.蒂莫菲维亚种timopheevii种的遗传多样性与种子的浓度效应和NAM-G1基因的遗传控制无关。可能还有其他生物学因素影响籽粒中锌、铁的含量。这些结果表明T.蒂莫菲维亚亚种timopheevii物种可能是一个有前途的遗传资源，高铁和锌浓度的生物强化现有的小麦品种。
Grains of 12 accessions of Triticum timopheevii (Zhuk.) Zhuk. ssp. timopheevii (AAGG, 2n = 4x = 28) and one bread wheat cultivar Chinese Spring (CS) and one durum wheat cultivar Langdon (LDN) grown across two years were analyzed for grain iron (Fe) and zinc (Zn) concentrations. All the 12 tested T. timopheevii ssp. timopheevii genotypes showed significantly higher concentration of grain Fe and Zn than CS and LDN. Aboundant genetic variability of both the Fe and Zn concentrations was observed among the T. timopheevii ssp. timopheevii accessions, averagely varied from 47.06 to 90.26 mg kg(-1) and from 30.05 to 65.91 mg kg(-1), respectively. Their grain Fe and Zn concentrations between years exhibited a significantly positive correlation with the correlation coefficients r = 0.895 and r = 0.891, respectively, indicating the highly genetic stability. Flag leaf possessed twice or three times higher concentrations for both Fe and Zn than grain, and a significantly high positive correlation appeared between the two organs with r = 0.648 for Fe and r = 0.957 for Zn concentrations, respectively, suggesting flag leaves might be indirectly used for evaluating grain Zn and Fe contents. Significant correlations occurred between grain Fe and Zn concentrations, and between grain Zn concentration and the two agronomic traits of plant height and number of spikelets per spike. Both the concentrations were not related to seed size or weight as well as NAM-G1 gene, implying the higher grain Fe and Zn concentrations of T. timopheevii ssp. timopheevii species are not ascribed to concentration effects of seed and the genetic control of NAM-G1 gene. There might be some other biological factors impacting the grain's Zn and Fe concentrations. These results indicated T. timopheevii ssp. timopheevii species might be a promising genetic resource with high Fe and Zn concentrations for the biofortification of current wheat cultivars.