新花色夜來香之育種

Breeding for New Flower Colors in Polianthes tuberosa

夜來香（Polianthes tuberosa L.）為本省重要之切花，近年來亦被許多國家認為具發展潛力之新興花卉。目前僅‘單瓣’及‘重瓣’二個品種，供商業化栽培，花型、花大小及花色等變化少，亟需加強育種，以創造新品種，有利於夜來香花卉產業之發展。本試驗先收集Polianthes tuberosa 'Single'、P. tuberosa 'Double'，P × howardii與P × blissii及其雜交選育之優良品系等，再經雜交及回交育種，再選出十五個優良品系，其中含三個白花色系，六個粉紅──紅花色系，四個紫紅花色系及二個黃花色系。

Tuberose is one of the most important cut flowers in Taiwan. It has also been regarded to have great potential for becoming a promising floral crop recently. However, only two major cultivars 'Single' and 'Double' are cultivated for commercial production in Taiwan. The less variations of flower shape, flower size and flower color in tuberose cause people pay more urgent to breed new cultivars. Polianthes tuberose 'Single', P tuberose 'Double', P.× howardii, P.× blissii and several selected hybrids are collected for this breeding program. Hybridization and back-crossing breeding were made among these collected cultivars and selected hybrids. Fifteen clones with improved characteristics are reselected, including three clones of white, six clones of pink-red, four clones of purple-red, and two clones of yellow flower color.