QTL mapping for agronomic traits in Agropyron Gaertn. CP population at the flowering stage

IF 1.6 3区农林科学 Q2 AGRONOMY

Euphytica Pub Date : 2024-04-27 DOI:10.1007/s10681-024-03336-z

Yonghe Che, Jing Yang, Yutong He, Nan Song, Yanping Yang, Lai Wei, Xinming Yang, Yannong Zhang, Jinpeng Zhang, Haiming Han, Xiuquan Li, Shenghui Zhou, Weihua Liu, Lihui Li

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引用次数: 0

Abstract

Flowering regulation is a reflection of plant self-adaptation to the environment and is the main determinant of plant yield. The quantitative trait loci (QTL) mapping of agronomic traits associated with the flowering stage of Agropyron Gaertn. was conducted using a cross-pollinated (CP) hybrid population with a total of 113 plant lines between A. mongolicum Keng Z2098 and A. cristatum (L.) Gaertn. Z1842 under four different environmental conditions and the genetic map constructed of 1,023 single-nucleotide polymorphism (SNP) markers. The results showed that 28 QTLs were detected on seven linkage groups. Each QTL explained 0.39–18.46% of the phenotypic variation, with a logarithm of odds (LOD) value ranging from 2.52 to 30.51. Specifically, QTLs were identified for various characteristics: one QTL identified for tiller number (TN), two for plant height (PH), three for days-to-flowering (DTF), five for flag leaf length (FLL), three for flag leaf width (FLW), three for spike length (SL), eight for spike width (SW), one for spikelet number per spike (SNS), and two for flower number per spike (FNS). One stable QTL controlling the SW was detected in two environments at the same loci and was located at 26 cM (Marker29867–Marker26864) on chromosome 5, showing a positive genetic effect. The two QTL enrichment regions suggested that the QTLs might contribute to trait correlation or pleiotropic genes. The identified QTLs potentially offer utility for marker-assisted breeding selection.

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Agropyron Gaertn.花期的 CP 群体

花期调节是植物自我适应环境的反映，也是植物产量的主要决定因素。本研究利用A. mongolicum Keng Z2098和A. cristatum (L.) Gaertn.在四种不同的环境条件下，用 1,023 个单核苷酸多态性（SNP）标记构建了遗传图谱。结果表明，在 7 个连锁群上检测到 28 个 QTL。每个 QTL 解释了 0.39-18.46% 的表型变异，几率对数值（LOD）从 2.52 到 30.51 不等。具体而言，为各种特征鉴定了 QTL：为分蘖数（TN）鉴定了 1 个 QTL、为株高（PH）鉴定了 2 个 QTL、为开花天数（DTF）鉴定了 3 个 QTL、为旗叶长度（FLL）鉴定了 5 个 QTL、为旗叶宽度（FLW）鉴定了 3 个 QTL、为穗长（SL）鉴定了 3 个 QTL、为穗宽（SW）鉴定了 8 个 QTL、为每穗小穗数（SNS）鉴定了 1 个 QTL、为每穗花数（FNS）鉴定了 2 个 QTL。在两个环境中的相同位点上检测到一个控制 SW 的稳定 QTL，位于 5 号染色体的 26 cM 处（Marker29867-Marker26864），显示出正向遗传效应。这两个 QTL 富集区表明，QTLs 可能有助于性状相关性或多效性基因。已鉴定的 QTLs 有可能为标记辅助育种选择提供实用价值。

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来源期刊

Euphytica 农林科学-农艺学

CiteScore

3.80

自引率

5.30%

发文量

157

审稿时长

4.5 months

期刊介绍： Euphytica is an international journal on theoretical and applied aspects of plant breeding. It publishes critical reviews and papers on the results of original research related to plant breeding. The integration of modern and traditional plant breeding is a growing field of research using transgenic crop plants and/or marker assisted breeding in combination with traditional breeding tools. The content should cover the interests of researchers directly or indirectly involved in plant breeding, at universities, breeding institutes, seed industries, plant biotech companies and industries using plant raw materials, and promote stability, adaptability and sustainability in agriculture and agro-industries.