Parent-Progeny Relationships for Carbon Isotope Discrimination and Related Characters in Crested Wheatgrass

Autor:	Antonio J. Palazzo, D. A. Johnson, K. H. Asay
Rok vydání:	1998
Předmět:	Agropyron desertorum education.field_of_study biology Perennial plant Population Forage Plant Science Heritability biology.organism_classification Agropyron cristatum Agronomy Botany Water-use efficiency Rangeland education Ecology Evolution Behavior and Systematics
Zdroj:	International Journal of Plant Sciences. 159:821-825
ISSN:	1537-5315 1058-5893
DOI:	10.1086/297602
Popis:	Improved cultivars of perennial grasses developed for natural resource conservation and forage production on semiarid rangelands of western North America must persist under extreme environmental stress and make efficient use of limited water resources. A close negative relationship has been documented between carbon isotope discrimination (Δ) and water use efficiency (WUE) in temperate ( C3) grasses, and preliminary evidence indicates that Δ would be a promising indirect selection criterion to improve WUE in crested wheatgrass, Agropyron cristatum (L.) Gaertner and Agropyron desertorum (Fisch. ex Link) Schultes, a widely used grass on semiarid rangelands. We determined the magnitude of genetic variability and parent-progeny relationships for Δ and the correlation of this attribute with forage yield in a genetically broad-based crested wheatgrass breeding population. Significant differences (P < 0.01) were found among clonal and progeny lines for Δ of the leaves and seeds. Broad-sense heritability values f...
Databáze:	OpenAIRE
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