Two drought-tolerant wheat cultivars, ‘TAM 111’ and ‘TAM 112’, have been widely grown in the Southern Great Plains of the U.S. and used as parents in many wheat breeding programs worldwide. This study aimed to reveal genetic control of yield and yield components in the two cultivars under both dryland and irrigated conditions. A mapping population containing 124 F5:7 recombinant inbred lines (RILs) was developed from the cross of TAM 112/TAM 111. A set of 5,948 SNPs from the wheat 90K iSelect array and double digest restriction-site associated DNA sequencing was used to construct high-density genetic maps. Data for yield and yield components were obtained from 11 environments. QTL analyses were performed based on 11 individual environments, across all environments, within and across mega-environments. Thirty-six unique consistent QTL regions were distributed on 13 chromosomes including 1A, 1B, 1D, 2A, 2D, 3D, 4B, 4D, 6A, 6B, 6D, 7B, and 7D. Ten unique QTL with pleiotropic effects were identified on four chromosomes and eight were in common with the consistent QTL. These QTL increased dry biomass grain yield by 16.3 g m-2, plot yield by 28.1 g m-2, kernels spike-1 by 0.7, spikes m-2 by 14.8, thousand kernel weight by 0.9 g with favorable alleles from either parent. TAM 112 alleles mainly increased spikes m-2 and thousand kernel weight while TAM 111 alleles increased kernels spike-1, harvest index and grain yield. The saturated genetic map and markers linked to significant QTL from this study will be very useful in developing high throughput genotyping markers for tracking the desirable haplotypes of these important yield-related traits in popular parental cultivars.

中文翻译：

---

全基因组鉴定与两个流行小麦品种TAM 111和TAM 112的产量和产量构成相关的QTL

美国南部大平原地区已广泛种植了两个耐旱小麦品种'TAM 111'和'TAM 112'，并在全球许多小麦育种计划中用作亲本。这项研究旨在揭示在旱地和灌溉条件下两个品种的产量和产量组成的遗传控制。从TAM 112 / TAM 111的杂交中开发了一个包含124个F5：7重组自交系（RIL）的作图种群。使用了来自小麦90K iSelect阵列和双重消化限制性位点相关DNA测序的一组5948个SNP。高密度遗传图谱。从11个环境中获得了产量和产量成分的数据。QTL分析是基于11个单独的环境，跨所有环境，在大型环境中以及跨大型环境进行的。36个独特的一致QTL区分布在13个染色体上，包括1A，1B，1D，2A，2D，3D，4B，4D，6A，6B，6D，7B和7D。在四个染色体上鉴定出十个具有多效作用的独特QTL，八个与一致的QTL相同。这些QTL使干生物量谷物产量增加了16.3 g m-2，地块产量增加了28.1 g m-2，籽粒穗数增加了0.7，穗粒m-2增加了14.8，千粒重增加了0.9 g，其中任一亲本的等位基因均有利。TAM 112等位基因主要增加穗粒m-2和千粒重，而TAM 111等位基因则增加籽粒穗1，收获指数和籽粒产量。