Study on Fruit Quality, Phenological Phases and Shoot Histomorphology of a New Bud Mutant Line, ＇ Chuanzao Loquat＇

摘要

[Objective] This study was to explore the growth characteristics and fruit quality of a new bud mutant line, 'Chuanzao Loquat'. [Method] Paraffin section technique combined with field investigation method were adopted to conduct com- parative analysis of shoot histomorphology and phenological phases between two Io- quat varieties, 'Chuanzao Loquat' and 'Zaozhong 6'. [Result] 'Chuanzao Loquat' branched out and unfolded leaves about half to a month earlier than 'Zaozhong 6'; both the flowering and fruiting phases of 'Chuanzao Loquat' were three months earlier than a precocious variety, 'Zaozhong 6'; the proportions of epidermis, cortex parenchyma, vascular tissue and medulla were 3.7%, 14.5%, 15.9% and 65.9%, re- spectively, in spdng shoots of 'Chuanzao Loquat', and 3.1%, 42.5%, 6.9% and 47.5%, respectively, in 'Zaozhong 6'. [Conclusion] In terms of phenological phases, 'Chuanzao Loqua' is earlier than 'Zaozhong 6', a currently widely planted precocious variety, and thus is an important germplasm resource of Ioquats.