Next Article in Journal
Tomato Plants Treated with Systemin Peptide Show Enhanced Levels of Direct and Indirect Defense Associated with Increased Expression of Defense-Related Genes
Previous Article in Journal
Genome-Wide Identification of WRKY Transcription Factors in the Asteranae
Open AccessArticle

Evaluation of Switchgrass Genotypes for Cold-Tolerant Seed Germination from Native Populations in the Northeast USA

1
Horticulture Section, Cornell AgriTech, School of Integrated Plant Sciences, Cornell University, Geneva, NY 14456, USA
2
Plant Breeding & Genetics Section, School of Integrated Plant Sciences, Cornell University, Ithaca, NY 14850, USA
3
United States Department of Agriculture/Natural Resources Conservation Service, Big Flats, NY 14830, USA
*
Author to whom correspondence should be addressed.
Plants 2019, 8(10), 394; https://doi.org/10.3390/plants8100394
Received: 26 August 2019 / Revised: 28 September 2019 / Accepted: 30 September 2019 / Published: 2 October 2019
The focus of this research was to evaluate genotypes for cold-tolerant germination from wild switchgrass (Panicum virgatum L.) populations collected in the Northeast USA. Switchgrass nurseries were established in 2008 and 2009 with seed collected from native stands of switchgrass in the Northeast USA between 1991 and 2008. Switchgrass seed harvested from individual genotypes was evaluated for cold-tolerant germination in a series of laboratory experiments. Germination assays of seed of 13 switchgrass genotypes harvested in the fall of 2016 are the primary focus of this reported research. The selected genotypes were evaluated for cold-tolerant seed germination in three experiments, during the spring of 2017, fall of 2017 and spring of 2018, (with and without stratification) using a 10/15 °C regime with a 12 h photoperiod. Germination tests showed that several genotypes had significantly higher percentage germination as well as faster germination rates expressed as T50 (number of days required to reach 50% maximum germination) when compared to Cave-in-Rock, a moderately sensitive cold-tolerant commercial cultivar established in the original switchgrass nursery as a control. A final germination test was conducted to compare seed from the original population (no selection cycle 0), with one of the top performing cold-tolerant germination genotypes, and a commercial cultivar, ‘Espresso’, developed for low seed dormancy and low temperature germination. In this test, the selected genotype had significantly higher percentage germination in the stratified treatment and was not significantly different than Espresso in the non-stratified test. These data indicate successful selection for cold-tolerant germination in switchgrass genotypes from native germplasm collected in the Northeast USA. View Full-Text
Keywords: switchgrass; C4 grasses; cold tolerance; bioenergy; seed germination; plant breeding switchgrass; C4 grasses; cold tolerance; bioenergy; seed germination; plant breeding
Show Figures

Figure 1

MDPI and ACS Style

Mayton, H.; Amirkhani, M.; Loos, M.; Crawford, J.; Crawford, R.; Hansen, J.; Viands, D.; Salon, P.; Taylor, A. Evaluation of Switchgrass Genotypes for Cold-Tolerant Seed Germination from Native Populations in the Northeast USA. Plants 2019, 8, 394.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop