Publication Date
1997
Description
Fifteen new guineagrass (Panicum maximum Jacq) hybrids, widely variable in flowering cycles, were tested for eleven seed quality parameters: seed viability (tetrazolium)-TZ; normal germination (with and without previous chemical scarification)-TG and NG; presence of viable seeds after the germination tests- RSTG and RSNG; seed dormancy-DTG and DNG; germination rate-TGR and NGR and seed vigor (after accelerated aging test) -AATG and AANG. The genetic materials used presented no significant differences for tetrazolium seed viability. Late- and intermediate-flowering genotypes showed the highest correlations between flowering cycle and seed quality for TG, NG, TGR and NGR (r= 0.468**; 0.731**; 0.422* and 0.683**, respectively) while very early- and earlyflowering ones had correlations for DTG and DNG of r= -0.473** and -0.758**, respectively. Erratic hybrid performance was observed as to AATG and AANG seed vigor, with low (r= 0.360*) or no correlation (r= -0.033ns ) with flowering cycle, respectively. Chemical scarification showed no effects on late- and intermediate-flowering hybrids (low seed dormancy) but markedly increased seed germination on early- and very early-flowering ones (high seed dormancy). The tetrazolium test was a reliable and efficient method to estimate seed viability potential. These results may be of great importance for laboratory tests as well for trading and sowing operations.
Citation
Usberti, R; Usberti, A Jr; and Paterniani, R S., "Flowering Cycle-Related Seed Quality Parameters on 15 New Guineagrass (Panicum maximum Jacq.) Hybrids" (2024). IGC Proceedings (1993-2023). 6.
https://uknowledge.uky.edu/igc/1997/session28/6
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Flowering Cycle-Related Seed Quality Parameters on 15 New Guineagrass (Panicum maximum Jacq.) Hybrids
Fifteen new guineagrass (Panicum maximum Jacq) hybrids, widely variable in flowering cycles, were tested for eleven seed quality parameters: seed viability (tetrazolium)-TZ; normal germination (with and without previous chemical scarification)-TG and NG; presence of viable seeds after the germination tests- RSTG and RSNG; seed dormancy-DTG and DNG; germination rate-TGR and NGR and seed vigor (after accelerated aging test) -AATG and AANG. The genetic materials used presented no significant differences for tetrazolium seed viability. Late- and intermediate-flowering genotypes showed the highest correlations between flowering cycle and seed quality for TG, NG, TGR and NGR (r= 0.468**; 0.731**; 0.422* and 0.683**, respectively) while very early- and earlyflowering ones had correlations for DTG and DNG of r= -0.473** and -0.758**, respectively. Erratic hybrid performance was observed as to AATG and AANG seed vigor, with low (r= 0.360*) or no correlation (r= -0.033ns ) with flowering cycle, respectively. Chemical scarification showed no effects on late- and intermediate-flowering hybrids (low seed dormancy) but markedly increased seed germination on early- and very early-flowering ones (high seed dormancy). The tetrazolium test was a reliable and efficient method to estimate seed viability potential. These results may be of great importance for laboratory tests as well for trading and sowing operations.
