Screening corn hybrids for early-stage drought stress tolerance using SPAR phenotyping platform.

IF 2 4区农林科学 Q2 AGRONOMY

Breeding Science Pub Date : 2024-06-01 Epub Date: 2024-07-09 DOI:10.1270/jsbbs.23037

Ajaz Ahmad Lone, Shamshir Ul Hussan, Salah H Jumaa, Zahoor Ahmad Dar, K Raja Reddy

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引用次数: 0

Abstract

An experiment was conducted comprising of six corn hybrids that were subjected to drought and irrigated environment in separate columns in soil-plant-atmosphere-research (SPAR) cubes. The treatments and hybrids in SPAR cubes were replicated four times and a two factorial randomized complete block design (RCBD) was used to analyze the effect of drought on hybrids and their effects on traits. Significant drought × hybrid interactions were observed for most of the parameters. All the traits observed under this study were affected by drought conditions. Root volume (RV) and root shoot ratio (RSR) increased, and number of root tips (NRT), number of root forks (NRF), and number of root crossings (NRC) were drastically reduced under drought conditions. The photosynthetic rate (Phot) declined by 57.96% and electron transport rate (ETR) by 54.60% and was negatively correlated with plant height (PH) and root number (RN) during drought stress. Chlorophyll content (SPAD) showed a non-significant correlation with all the traits. As per results, there were significant differences among corn hybrids for different traits studied under the SPAR setup, which indicates that this setup successfully creates differences in treatments. A cumulative drought stress response index (CDSRI) was worked out. DKC-6581 and N61X-3110 were found to be highly drought tolerant as per our findings.

查看原文本刊更多论文

利用 SPAR 表型平台筛选早期耐干旱胁迫的玉米杂交种。

在土壤-植物-大气-研究（SPAR）立方体中，对六种玉米杂交种分别进行了干旱和灌溉环境试验。SPAR 方格中的处理和杂交种重复四次，采用双因子随机完全区组设计（RCBD）分析干旱对杂交种的影响及其对性状的影响。在大多数参数上都观察到了干旱与杂交种的显著交互作用。本研究观察到的所有性状都受到干旱条件的影响。在干旱条件下，根量（RV）和根芽比（RSR）增加，根尖数（NRT）、根分叉数（NRF）和根交叉数（NRC）大幅减少。在干旱胁迫下，光合速率（Phot）下降了 57.96%，电子传递速率（ETR）下降了 54.60%，并且与株高（PH）和根数（RN）呈负相关。叶绿素含量（SPAD）与所有性状均无显著相关性。结果表明，在 SPAR 设置下研究的玉米杂交种在不同性状上存在显著差异，这表明该设置成功地创造了处理差异。研究得出了累积干旱胁迫反应指数（CDSRI）。根据我们的研究结果，DKC-6581 和 N61X-3110 具有很强的抗旱性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Breeding Science 农林科学-农艺学

CiteScore

4.90

自引率

4.20%

发文量

审稿时长

1.5 months

期刊介绍： Breeding Science is published by the Japanese Society of Breeding. Breeding Science publishes research papers, notes and reviews related to breeding. Research Papers are standard original articles. Notes report new cultivars, breeding lines, germplasms, genetic stocks, mapping populations, database, software, and techniques significant and useful for breeding. Reviews summarize recent and historical events related breeding. Manuscripts should be submitted by corresponding author. Corresponding author must have obtained permission from all authors prior to submission. Correspondence, proofs, and charges of excess page and color figures should be handled by the corresponding author.