We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Performance of diploid and interploid hybrids of St. Augustinegrass under moderate shade.
- Authors
Meeks, Meghyn; Chandra, Ambika
- Abstract
Shadetolerance is an important factor for cultivar selection in urban areas. Diploid (2n = 2x = 18) cultivars of St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] with moderate to high shade tolerance have been popular choices for residential and commercial landscapes in the southern United States. This study evaluated 26 elite drought resistant diploid and interploid (polyploid × diploid) hybrids and four commercial cultivars under 75% continuous shade from 20 June 2017 through 30 Oct. 2018. Biweekly data were collected during the growing season for percent green cover, visual turfgrass quality, canopy color, shoot density, and daily leaf elongation rates (DER; mm d–1). Spring greenup was rated annually, and to gray leaf spot incidence was rated when naturally occurring. All genotypes lost green cover through 2017, and greenup was delayed transitioning into the summer of 2018 when most diploids struggled to recover from disease, shade, and winter injury whereas, on an average, interploid hybrids reached up to 84.0% green cover. Daily leaf elongation rates were lower for diploids than polyploids in both years. Turfgrass quality, color, and density generally declined under shade as expected. Overall, three interploid hybrids (DALSA 1329, 1404, and 1406) were the top performers demonstrating good retention of turfgrass performance traits and reduced DER under shade. Core Ideas: Environmental conditions influenced St. Augustinegrass response under moderate shade.Daily leaf elongation rates were lower for diploids but similar in growth pattern to polyploids.Three interploid hybrids retained cover, quality, color, and density under moderate shade.
- Subjects
UNITED States; LEAF spots; GROWING season; CITIES &; towns; CULTIVARS; HYBRID rice
- Publication
Crop Science, 2021, Vol 61, Issue 5, p3719
- ISSN
0011-183X
- Publication type
Article
- DOI
10.1002/csc2.20573