A molecular approach to study gene flow between wild, weedy, and cultivated rice in South and Southeast Asia

Augustine Tensaout, Hayeit (2008) A molecular approach to study gene flow between wild, weedy, and cultivated rice in South and Southeast Asia. PhD thesis, University of Liverpool.

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Abstract

Gene flow amongst AA genome rice species Oryza sativa (cultivated rice) and 0. rufipogon and 0. nivara (wild relatives) is known to occur in rice agro-ecosystems in many Asian countries. Gene flow leads to the formation of hybrid plants that may coexist with parental species. These hybrids (especially 'weedy rice'- plants that are very similar to cultivars but possessing undesirable traits) are a threat to rice production as they may reduce cultivated rice yields, both qualitatively and quantitatively. The precise origins of 'weedy' rice (WR) genotypes are unknown but two main hypotheses have been proposed: endoferality (by segregation and selection of weedy traits from existing heterozygous cultivars in areas where no wild rice exists) and exoferality via gene flow between cultivated and wild rice species. With a continuous growing world population especially in Asia, food demand has to be satisfied with an increase in rice production, playing a key role.

Item Type:	Thesis (PhD)
Depositing User:	Symplectic Admin
Date Deposited:	20 Oct 2023 09:24
Last Modified:	20 Oct 2023 09:42
DOI:	10.17638/03174437
Copyright Statement:	Copyright © and Moral Rights for this thesis and any accompanying data (where applicable) are retained by the author and/or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3174437