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bioRxiv · 10.1101/2021.10.26.465940

SCS313 Serrano, a big trefoil selected for flowering ability and seed production

Rocha, D. J. A.·Cordova, U. A.·Flaresso, J.·Stradiotto, J.·Dalla-Costa, M.
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Abstract

SCS313 Serrano is a tetraploid cultivar of Lotus uliginosus developed by the Research and Rural Extension Company of Santa Catarina, Brazil, to improve flowering ability and seed production in low-latitude regions. SCS313 Serrano was developed from the selection of individual plants of the cultivar Grasslands Maku. Seeds from the initial breeding population was bulked and used to establish a field trial with spaced plants. The plants were selected and classified as late or early, regarding the beginning of flowering, through visual evaluations based on the time for the beginning of flowering. Selected plants were transplanted to crossing blocks and seed harvested on individual plants; a progeny test was conducted, with four replications, through the establishment of approximately 100 genotypes in a field. This process was repeated for three consecutive cycles of recurrent selection. Considering the mean time for the beginning of flowering and vigor performance, the best five genotypes were selected as parental lines for the synthetic cultivar SCS313 Serrano. A morphological difference between SCS313 Serrano and Grasslands Maku is that SCS313 Serrano has absence of hairs in stems whereas Grasslands Maku has a medium stem hair density. In addition, SCS313 Serrano exhibits profuse flowering ability while Grasslands Maku exhibits very sparse seedhead formation. SCS313 Serrano exhibited good persistence under wet conditions and similar forage yields compared to other lotus commercial cultivars. Thus, SCS313 Serrano is recommended to be used as pasture in mixtures with grass in livestock systems, mainly on wet soils.

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Rocha, D. J. A., Cordova, U. A., Flaresso, J., Stradiotto, J., Dalla-Costa, M.. 2021-10-28. SCS313 Serrano, a big trefoil selected for flowering ability and seed production. https://doi.org/10.1101/2021.10.26.465940

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