2009
DOI: 10.2135/cropsci2008.05.0277
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Genetic Dissection of Seed Production Traits and Identification of a Major‐Effect Seed Retention QTL in Hybrid Leymus (Triticeae) Wildryes

Abstract: Many native grasses display seed shattering and other seed production problems. Basin wildrye [Leymus cinereus (Scribn. & Merr.) Á. Löve] and creeping wildrye [L. triticoides (Buckley) Pilg.] are perennial Triticeae grasses native to western North America. In this study, variation in the number of florets per inflorescence, percent seed set, seed mass, seed shattering, and seed dormancy was measured in clonally replicated multiyear field evaluations of 164 progeny derived from a backcross between a creeping × … Show more

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Cited by 29 publications
(23 citation statements)
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“…In hybrid Leymus (Triticeae) wildryes, a major-effect seed retention QTL was identified [14]. A MSDS-box gene WM8 was cloned in Elymus nutans [15]. However, the mechanism of seed shattering in many forage grasses remains largely unexplored and poorly understood.…”
Section: Introductionmentioning
confidence: 99%
“…In hybrid Leymus (Triticeae) wildryes, a major-effect seed retention QTL was identified [14]. A MSDS-box gene WM8 was cloned in Elymus nutans [15]. However, the mechanism of seed shattering in many forage grasses remains largely unexplored and poorly understood.…”
Section: Introductionmentioning
confidence: 99%
“…Chromosome regions known as quantitative trait loci (QTLs) house genes that control differences between shattering and non‐shattering genotypes of species of the North American natives, Leymus wildryes (Larson & Kellogg ) and wild rice ( Zizania palustris L.) (Kennard et al ). Differences between shattering and non‐shattering genotypes or species can be caused by dominant or recessive mutations in one of several different genes involved in the formation of the abscission layer (Li & Gill ; Doust et al ).…”
Section: Functional Traits For Artificial Selectionmentioning
confidence: 99%
“…One strategic approach to mitigate this concern would be to combine shattering and non‐shattering plant materials in a seed mix with the objective of restoring the shattering trait to the non‐shattering population via hybridization at the restoration site. In the case of Triticeae grasses, the shattering allele is dominant ( A ) and the non‐shattering allele is recessive ( a ) (Larson & Kellogg ). Thus, the shattering phenotype is disproportionately higher than its allele frequency because it encompasses both homozygous dominant ( AA ) and heterozygous ( Aa ) genotypes.…”
Section: Functional Traits For Artificial Selectionmentioning
confidence: 99%
“…Likewise, shattering loci in rice regulate disarticulation of the rachilla below the two proximal sterile flowers but above the glumes (Konishi et al 2006;Li et al 2006;Zhou et al 2012). Larson and Kellogg (2009) have identified overlapping QTL for shattering among Leymus hybrids, Zizania palustris, Oryza sativa, and Triticum aestivum, suggesting common genetic programs, but the corresponding genes have not been cloned. In contrast, many studies find unique genes controlling shattering in each species investigated (Doust et al 2014).…”
Section: Disarticulationmentioning
confidence: 99%