Hybrids Development between Greek <i>Salvia</i> Species and Their Drought Resistance Evaluation along with <i>Salvia fruticosa</i>, under Attapulgite-Amended Substrate
Maria Papafotiou | Aikaterini N. Martini | Eleonora Papanikolaou | Eleftherios G. Stylias | Anastasios Kalantzis
Aiming to obtain <i>Salvia</i> hybrids with ornamental value and high drought resistance, for xeriscaping, crossbreeding was made with Greek <i>Salvia</i> species. <i>S. fruticosa</i> and <i>S. officinalis</i> when used as seed parent were successfully crossed with <i>S. pomifera</i> ssp. <i>pomifera</i>, <i>S. ringens</i> and <i>S. tomentosa</i>, while when used as pollen parent it only succeeded between <i>S. fruticosa</i> and <i>S. tomentosa.</i> The growth of <i>S. fruticosa</i> and the four hybrids, <i>S. officinalis</i> × <i>S. pomifera,</i> <i>S. officinalis</i> × <i>S. tomentosa</i>, <i>S. officinalis</i> × <i>S. ringens</i> and <i>S. fruticosa</i> × <i>S. ringens</i>, selected for their ornamental traits, was evaluated under limited irrigation and modification of the substrate with attapulgite clay. The hybrids <i>S. officinalis</i> × <i>S. ringens</i> and <i>S. officinalis</i> × <i>S. tomentosa</i> developed a compact plant shape and most lateral shoots, desirable characteristics for potted plants and xeriscaping. All hybrids, especially <i>S. officinalis</i> × <i>S. pomifera</i> and <i>S. officinalis</i> × <i>S. tomentosa,</i> survived water stress better than <i>S. fruticosa</i>. Modification of the substrate with attapulgite, under limited irrigation, caused a decrease in the above ground/root biomass ratio in some hybrids and in <i>S. fruticosa</i> increased the dry weight of the root indicating increased drought resistance.
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