Abstract:

As a study of the allelopathy of multiplier onion（Allium cepa var. aggregatum）on the reproductive development in garlic（Allium sativum），‘Yining Hongpi’garlic and‘M-4’bolting multiplier onion were used to examine the effect on garlic flowering through mixed intercropping. The results showed that bolting multiplier onion significantly enhanced the growth potential of garlic. The mean plant height and pseudostem diameter were 96.3 cm and 10.6 mm respectively and increased significantly by 6.1 cm，2.4 mm compared with control group. Bolting multiplier onion promoted the reproductive development in garlic. The bolting time was advanced by 4 days under allelopathic treatment in comparison with the control group. The number of functional florets per inflorescence increased，meanwhile the number and size of topsets decreased. The transcriptional levels of the floral meristem identity genes gaLFY and AsFUL were up-regulated. Bolting multiplier onion had allelopathic effects on garlic by promoting the functional flower development to potentially restore fertility.