Self-and cross-incompatibility relationship in rose (Rosa hybrida) varieties

An experiment was conducted to find out the self-and cross-incompatibility relationship among varieties of rose (Rosa hybrida L.) during 2012–13 at the Research Farm of Division of Floriculture and Landscaping, Indian Agricultural Research Institute, New Delhi. The compatibility relationships among varieties help in designing the hybridization programme in roses efficiently. Self-and cross-incompatibility were widely prevalent in varieties of rose making the hybridization programme challenging. Among the 57 varieties studied, 12 were self-incompatible, while 30 were cross-incompatible. These cross-incompatible varieties cannot be used in breeding programme. It is recommended to use the 25 varieties (Delhi Princess, Dr Benjamin Pal, Soma, Pusa Pitamber, Pusa Abhishek, Sugandha, Jawani, Dr Bharat Ram, Mridula, Jantar Mantar, Dr S S Bhatnagar, Suchitra, Pusa Komal, Surabhi, Sadabahar, Shreyasi, Priyadarshini, Mrinalini, Mother Teresa, Arjun, Pink Montezuma, Pink Parfait, Shola, Homage and Raktima) that were cross-compatible in the breeding programme. Out of these varieties, 24 exhibited self-and cross-compatibility, while 9 were both self-and cross-incompatible.