Genetic analysis of meiotic-stage water stress tolerance in wheat (Triticum aestivum. L.)

Ifeyinwa Olive Onyemaobi

doi:10.4225/23/5ac2eb72ec613

Genetic analysis of meiotic-stage water stress tolerance in wheat (Triticum aestivum. L.)

Ifeyinwa Olive Onyemaobi

UWA School of Agriculture and Environment

Research output: Thesis › Doctoral Thesis

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Abstract

Wheat grown under rain-fed farming systems often experiences water stress during meiosis - a highly water-sensitive phase. This study found that both male and female organs were responsible for low seed set and yield reduction when water stress
occurred during meiosis. Major contributors to high seed set in wheat exposed to meiotic-stage water stress were found to be additive genes. Two major QTL responsible for grain number under meiotic-stage water stress were identified and validated.
Two SSR markers linked to the validated QTL could potentially be useful in marker-assisted selection for breeding wheat cultivars resistant to water stress during meiosis.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Yan, Guijun, Supervisor Siddique, Kadambot, Supervisor Liu, Hui, Supervisor
Award date	15 Mar 2018
DOIs	https://doi.org/10.4225/23/5ac2eb72ec613
Publication status	Unpublished - 2018

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10.4225/23/5ac2eb72ec613

THESIS - DOCTOR OF PHILOSOPHY - ONYEMAOBI Olive Ifeyinwa - 2018
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Cite this

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abstract = "Wheat grown under rain-fed farming systems often experiences water stress during meiosis - a highly water-sensitive phase. This study found that both male and female organs were responsible for low seed set and yield reduction when water stressoccurred during meiosis. Major contributors to high seed set in wheat exposed to meiotic-stage water stress were found to be additive genes. Two major QTL responsible for grain number under meiotic-stage water stress were identified and validated.Two SSR markers linked to the validated QTL could potentially be useful in marker-assisted selection for breeding wheat cultivars resistant to water stress during meiosis.",

keywords = "Wheat, Meiosis, Water stress tolerance, Genetic analysis, Auricle distance",

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school = "The University of Western Australia",

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AU - Onyemaobi, Ifeyinwa Olive

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AB - Wheat grown under rain-fed farming systems often experiences water stress during meiosis - a highly water-sensitive phase. This study found that both male and female organs were responsible for low seed set and yield reduction when water stressoccurred during meiosis. Major contributors to high seed set in wheat exposed to meiotic-stage water stress were found to be additive genes. Two major QTL responsible for grain number under meiotic-stage water stress were identified and validated.Two SSR markers linked to the validated QTL could potentially be useful in marker-assisted selection for breeding wheat cultivars resistant to water stress during meiosis.

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KW - Meiosis

KW - Water stress tolerance

KW - Genetic analysis

KW - Auricle distance

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