Cross-Compatibility in Interspecific Hybridization of Different Curcuma Accessions

Curcuma is extensively cultivated as a medicinal and ornamental plant in tropical subtropical regions. Due to the bright bract color, distinctive inflorescence long blooming period, it has become new favorite terms of urban landscape, potted flowers cut flowers. However, little research on breeding cultivars using traditional methods available genus Curcuma. In present study, pollen viability stigma receptivity evaluation were performed, genetic relationship 38 accessions was evaluated, then 5 C. alismatifolia Gagnep. (Ca), 2 hybrid (Ch), sparganiifolia 4 native species selected parents for subsequent interspecific cross-breeding. A total 132 reciprocal crosses carried out hybridization, including 70 obverse 62 inverse crosses. Obvious discrepancies among fruit-setting rates manifested different combinations Results showed that highest rate (87.5%) observed Ca combinations. There 87 with 0%, which meant nearly 65.9% incompatible. We concluded ‘Siam Shadow’ (Ch34) suitable male parent petiolata Roxb. (Cpet) female improve rates. The maximum number seeds per fruit (45.4) obtained when ‘Chiang Mai Pink’ (Ca01) used followed by attenuata Wall. ex Baker (Catt) (42.8) ‘Splash’ (Ca63) (39.6) parents. germination group Catt ‘Maetang Sunrise’ (Csms). ranged from 58.2% (C. Scarlet’ (Ca06) parent) 89.3% ‘Sitone’ (Ca10) an average value 74.0%. Based results identification, all individuals four exhibited paternal-specific bands, indicating true crossings 100%. Our would facilitate hybridization introduction variation wild into future, could be helpful realizing sustainable application green areas.