Genotype x Competition Level Interactions in Crested Wheatgrass (Agropyron desertorum Poaceae: Triticeae)

Autor:	K. H. Asay, D. A. Johnson
Rok vydání:	1997
Předmět:	Agropyron desertorum biology media_common.quotation_subject Plant Science Heritability biology.organism_classification Competition (biology) Intraspecific competition Plant ecology Botany Poaceae Gene–environment interaction Triticeae Ecology Evolution Behavior and Systematics media_common
Zdroj:	International Journal of Plant Sciences. 158:851-855
ISSN:	1537-5315 1058-5893
DOI:	10.1086/297499
Popis:	Plant competition for available resources is important for most crops, but it is particularly critical for grasses growing in water-limited rangelands of the western United States and similar environments. A wagon-wheel design was used to study the responses of 30 crested wheatgrass (Agropyron desertorum [Fisch ex Link] Schultes) clonal lines to eight intraspecific competition levels. Plots were established at two locations, D (irrigated) and E (nonirrigated). Differences among clonal lines and competition levels were significant (P < 0.01) for dry matter yield when expressed as g plant-1 (DMYP) and Mg ha-1 (DMYH). Genetic variances and heritability values for DMYP increased markedly as the level of competition decreased; however, trends for genetic variances were less consistent for DMYH. A largely linear increase was found in DMYP under wider plant spacings, particularly under more arid conditions with no supplemental irrigation at location E. Maximum DMYP occurred at spacing level 8 (area = 1.28 m2) un...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c3077280dd1ca40f54ecb485a23e7cf0 https://doi.org/10.1086/297499 Zobrazit plný text záznamu Plný text ve formátu PDF