Mapping for yield related traits in rice reveals major effect QTL qFLA1.1 from Oryza nivara increases flag leaf area

IF 1.6 3区农林科学 Q2 AGRONOMY

Euphytica Pub Date : 2024-03-13 DOI:10.1007/s10681-024-03297-3

Haritha Guttikonda, Gowthami Chandu, Suchandranath Babu Munnam, Kavitha Beerelli, Divya Balakrishnan, R. Madhusudhana, Sarla Neelamraju

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Abstract

A stable back cross introgression line IL65 (IET22161) (Swarna/O. nivara-BC₂F₆) of rice was used to map flag leaf related traits in F₂ and F₃ populations. A total of 12 QTLs were mapped on two chromosomes with each QTL explaining 3 to 21% phenotypic variance (PV). Interestingly, a novel 12 Mb QTL cluster (RM8094—RM9) that controls 7 traits was identified on long arm of chromosome 1 where QTLs qSPAD1.2, qSPAD1.3 for SPAD, qFLL1.1, qFLL1.2 for flag leaf length, qFLW1.1, qFLW1.2 for flag leaf width, qFLA1.1, qFLA1.2 for flag leaf area, qPH1.1, qPH1.2 for plant height, qDTF1.2, qDTF1.3 for days to flowering and qHI1.2, qHI1.3 for harvest index were co-located. Among these, one major effect QTL qFLA1.1 for flag leaf area explaining 12.7% PV was identified in a 9 Mb region between RM8094 and RM5638. There was an adjacent minor effect QTL qFLA1.2 with 7% PV in a 3 Mb region between RM5638 and RM9. Together, these two QTLs from O. nivara explained 19.7% PV of leaf area. The QTL for flag leaf related traits can be fine mapped and considered for breeding rice varieties with higher flag leaf area, photosynthetic rate and grain yield.

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水稻产量相关性状的测绘揭示了 Oryza nivara 的 QTL qFLA1.1 对增加旗叶面积的主要影响

利用水稻稳定的回交导入系 IL65 (IET22161) (Swarna/O. nivara-BC2F6)，在 F2 和 F3 群体中绘制了旗叶相关性状图谱。在两条染色体上共绘制了 12 个 QTL，每个 QTL 可解释 3% 到 21% 的表型变异（PV）。有趣的是，在 1 号染色体长臂上发现了一个控制 7 个性状的 12 Mb QTL 簇（RM8094-RM9），其中 QTL qSPAD1.2、qSPAD1.3 代表 SPAD，qFLL1.1、qFLL1.2 代表旗叶长度，qFLW1.1、qFLW1.2（旗叶宽度）、qFLA1.1、qFLA1.2（旗叶面积）、qPH1.1、qPH1.2（株高）、qDTF1.2、qDTF1.3（开花天数）和 qHI1.2、qHI1.3（收获指数）是共位的。其中，在 RM8094 和 RM5638 之间的 9 Mb 区域发现了一个旗叶面积解释 12.7% PV 的主要效应 QTL qFLA1.1。这两个来自 O. nivara 的 QTL 共解释了 19.7% 的叶面积 PV。可以对旗叶相关性状的 QTL 进行精细测绘，并考虑培育旗叶面积、光合速率和产量更高的水稻品种。

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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.