Genetic variability, response to selection for agro-physiological traits, and traits-enhanced drought tolerance in durum wheat

IF 4.7 Q1 ECOLOGY

生态学报 Pub Date : 2023-10-01 DOI:10.1016/j.chnaes.2022.10.009

Firouz Shirvani , Reza Mohammadi , Mashaallah Daneshvar , Ahmad Ismaili

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引用次数: 3

Abstract

This study was undertaken to estimate the genetic variability and response to selection for twenty-four agro-physiological traits of nineteen durum wheat genotypes under drought and irrigated conditions during two cropping seasons (2017–18 and 2018–19). Large phenotypic and genotypic variations (PCV, GCV) for agronomic (3148.3, 1829.3) followed by morphological (253.3, 232.5), physiological (18.2, 17.6) and phenological (14.2, 12.6) traits were observed. The high heritability (h²) coupled with high percent of genetic advance as percent of mean (GAM%) was expressed highest in physiological traits (i.e., chlorophyll fluorescence (h² = 0.70, GMA% = 250.1) and normalized difference vegetation index (h² = 0.71, GMA% = 193.8)), followed by morphological traits (i.e., peduncle extrusion (0.90, 186.9), peduncle length (0.95, 109.2), flag-leaf length (0.85, 108.4)), agronomic traits (i.e, harvest index (0.59, 230.1), 1000-kernel weight (0.83, 42.7)) and phenological traits (i.e., days to 50% booting (0.91, 7.6) and heading (0.93, 6.9)). Based on the results, superior genotypes (URRACA, Saji and Icasyr1/3/Gcn//Stj/Mrb3) with high yielding performance, good trait profiles and high drought tolerance were identified. The findings of this research demonstrated the existence of high response to selection for agro-physiological traits in durum wheat under drought conditions, which represents potential in hybridization schemes of wisely chosen parents for creating genetically improved drought tolerant varieties.

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硬粒小麦的遗传变异、对农业生理性状选择的响应及抗旱性的增强

本研究旨在评估在两个种植季节（2017-18和2018-19）干旱和灌溉条件下，19个硬粒小麦基因型的24个农业生理性状的遗传变异性和选择反应。观察到农艺性状（3148.31829.3）、形态性状（253.3232.5）、生理性状（18.217.6）和表型性状（14.212.6）的大表型和基因型变异（PCV，GCV）。高遗传力（h2）与高遗传进展百分比（GAM%）在生理性状（即叶绿素荧光（h2=0.70，GMA%=250.1）和归一化差异植被指数（h2=0.71，GMA%=193.8））中表达最高，其次是形态性状（即花序梗挤出（0.90186.9）、花序梗长度（0.95109.2），旗叶长（0.85108.4）、农艺性状（收获指数（0.59200.1）、千粒重（0.83，42.7））和酚类性状（孕穗天数至50%（0.91，7.6）和抽穗天数（0.93，6.9））。这项研究的结果表明，在干旱条件下，硬粒小麦对农业生理性状的选择具有很高的响应性，这代表了明智选择的亲本在杂交方案中创造转基因抗旱品种的潜力。

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来源期刊

生态学报 Environmental Science-Ecology

CiteScore

5.30

自引率

0.00%

发文量

17028

审稿时长

68 days

期刊介绍： Our Journal publishes recent theories and novel experimental results in ecology, and facilitates academic exchange and discussions both domestically and abroad. It is expected that our journal will promote the development of and foster research talents for ecological studies in China.