Effects of variety degeneration on yield formation, quality traits and 2-acetyl-1-pyrroline biosynthesis in high-quality Japonica rice.

IF 5 1区农林科学 Q1 AGRONOMY

Rice Pub Date : 2025-08-19 DOI:10.1186/s12284-025-00837-w

Qiang Shi, Zexu Zhou, Wenjie Lu, Jinlong Hu, Nianbin Zhou, Qiangqiang Xiong, Hongcheng Zhang, Jinyan Zhu

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Abstract

The main purpose of the present study was to study the degeneration of the high-quality japonica rice varieties during long-term cultivation, with a focus on changes in yield, rice quality and indices related to 2-acetyl-1-pyrroline (2-AP) biosynthesis, to provide a scientific basis for the comprehensive purification and improvement of high-quality rice varieties. By selecting the lines from the populations of Nanjing 9108 and Nanjing 46 at Liyang, it was found that the mutant lines showed significant differences in the yield and yield components, processing and appearance quality, cooking and flavor quality, rapid viscosity analyser profile characteristics and 2-AP content. Molecular marker detection can be used as a primary method for seed purity identification. The results revealed that the 2-AP content was positively correlated with proline activity, ProDH activity and δ-OAT activity but negatively correlated with BADH2 activity. Through stepwise discriminant analysis, it was determined that 1000-grain weight and trough viscosity could be used as core indicators for discriminating line variations.

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品种退化对优质粳稻产量形成、品质性状及2-乙酰基-1-吡咯啉生物合成的影响

本研究的主要目的是研究优质粳稻品种在长期栽培过程中的退化，重点研究产量、稻米品质及2-乙酰基-1-吡啶（2-AP）生物合成相关指标的变化，为优质粳稻品种的综合纯化和改良提供科学依据。通过对南京9108和南京46在溧阳的群体选育，发现突变系在产量和产量组成、加工和外观品质、蒸煮和风味品质、快速粘度分析仪剖面特征和2-AP含量等方面存在显著差异。分子标记检测可作为种子纯度鉴定的主要方法。结果表明，2-AP含量与脯氨酸活性、ProDH活性和δ-OAT活性呈正相关，与BADH2活性呈负相关。通过逐步判别分析，确定千粒重和谷粘度可作为判别品系变化的核心指标。

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来源期刊

Rice AGRONOMY-

CiteScore

10.10

自引率

3.60%

发文量

审稿时长

>12 weeks

期刊介绍： Rice aims to fill a glaring void in basic and applied plant science journal publishing. This journal is the world''s only high-quality serial publication for reporting current advances in rice genetics, structural and functional genomics, comparative genomics, molecular biology and physiology, molecular breeding and comparative biology. Rice welcomes review articles and original papers in all of the aforementioned areas and serves as the primary source of newly published information for researchers and students in rice and related research.