Variation for Seedling Root Architecture in the Core Collection of Pea Germplasm

Abstract

bauer, 1996). Many pea diseases common in production areas affect root growth and function, thereby limiting Root growth is an important component of plant growth but has productivity (Kraft and Pfleger, 2001, p. 67). Tolerance received little attention by plant breeders because of difficulties associto many root diseases has been attributed to rapid root ated with root observation. Improved root architecture and production growth and production of large root mass; however, are likely to improve pea (Pisum sativum L.) production because they are often grown on marginal land and suffer from increased improved root growth parameters have not always been disease pressure and poor fertility. The objective of this study was to correlated with increased productivity (Kraft and Boge, quantify the phenotypic variation in seedling root production among 2001). However, analysis of seedling root characters has Pisum germplasm and to classify the root architecture observed. Seed been shown to relate well to root production under field of 330 accessions from the core collection of Pisum germplasm were conditions (Kraft and Boge, 2001; Veitenheimer and germinated and grown under artificial conditions for 14 d and their Gritton, 1984). Prolific root growth is not only expected root characters analyzed. Root systems were scanned and digitized to provide an advantage to the plant in the presence of by the WinRHIZO program. Data collected included taproot length, pathogens, but also under conditions where herbicide shoot length, and root and shoot dry weight. Data generated by Windamage may occur (Ali-Kahn and Snoad, 1977). Many RHIZO included total root length, surface area, average root diameherbicides applied to the pea crop have potential to ter, and root volume. Taproot length ranged from 181 to 433 mm, while root and shoot dry weight ranged from 6 to 57 mg and 13 to damage plant growth when taken up by roots. Rapid 104 mg, respectively. Total root length ranged from 54 to 399 cm,

Why and How Using Micropropagated Trees rather than Germinations for Controlled Synthesis of Ectomycorrhizal Associations?

“…Impact of seed size was studied in large-seeded tree species for which reserves in cotyledons play a determining role for germination and early growth of young seedlings. Intraspecific variations in seed sizes correlate with embryonic soluble sugars (Merouani et al 2003), root growth parameters (McPhee 2005) and development of primary leaves (Ichie et al 2001). Such differences make it difficult to optimize a regular production of homogeneously-developed plants to routinely make EM synthesis assays.…”

A comparison of root architecture and shoot morphology between naturally regenerated and container-grown seedlings of Quercus ilex

“…Root architectural analysis allows a formal description of root systems and has important ecological applications since architecture reflects root plasticity responses to environmental heterogeneity and edaphic constraints to plant productivity and determines the function of roots in mechanical support of the shoots Lynch 1995;McPhee 2005).…”

Association mapping of agronomic and quality traits in USDA pea single-plant collection

“…The collection was constructed to maximize diversity of origin and flower color, using a proportional logarithmic model to determine the appropriate number of accessions per country (Coyne et al 2005a). The USDA pea core collection has been evaluated extensively for a variety of agronomic and morphological traits (Coyne et al 2005a), disease and pest resistances Tedford and Inglis 1999;Malvick and Percich 1999), stem and root traits McPhee 2005), and protein and micronutrient content (Grusak et al 2004;Coyne et al 2005b). This information can be found through the USDA Agricultural Research Service's Germplasm Resources Information Network (GRIN) National Plant Germplasm System database (www.ars-grin.gov/npgs/).…”