Studies On Cultivar Classification Of Lagerstroemia L. In Jiangxi Province

Lagerstroemia indica L. is fry plants which is endemic to China. It’s flowering fromearly June to the end of September. The flower have rich vibrant colors.This plant with ahigh ecological value, ornamental value, economic value and medicinal value. It has beenplanted in China more than1,500years.From the beginning of the Tang Dynasty planted inthe court, and later widely grown in the private sector. So far from now, the discovery ofthe Lagerstroemia L.plants totaling19kinds in our countryside, the varieties has beenofficially published totaling176. In this paper, the L. indica L. varieties of resources inJiangxi to conduct a comprehensive survey and classification studies. The main researchresults are as follows:1. Taking a full investigation on the Lagerstoemia L. germplasm in Jiangxi garden andconstruct L. indica L. system for classifying varieties. Eventually,it has found varieties106. It has7species in Jiangxi province, L.indica L., L.limii L., L.subcostata Koehne,L.caudata Chun et How ex S. Lee et L. Lau, L.speciosa L.Pers. and two interspecifichybrids, L.indica L.×L.limii L.,L.indica L.×L.subcostata Koehne.2.According to "International Code of Nomenclature for Cultivated Plants", therelevant provisions of the new breed survey named, and the name and species grouppreviously published species name does not comply with the relevant provisions of lawsand regulations to give redress.3.According to the differences of individual plant species, such as branches posture,flower color, flower diameter, claw long, claw color, calyx shape, calyx color traits, thepreparation of Jiangxi province90cultivars and16hybrids classification retrieval table.4.Investigating on classification characters, principles and degree, also accord toprovenance, flower color and plant type divided in7cultivate groups: L.indica L. Amabilisgroup, L.indica L. Alba group, L.indica L. Rubra group, L.indica L. Versicolor group,L.indica L.Nana group and L.indica×L.limii group, L.indica×L.subcostata group.5.The first time observed and studied on seed surface ornamentation using electronmicroscopy.The results show that exhibit some common characteristicsthe on seed surfaceornamentation in cell shape, wall ornamentation cell types and species of fin shape, kind ofwing wall ornamentation types. But it show significant differences on seed length, seedwidth, seed single cell, the length and width of the seed unicellular species winged,broad-winged species, species of unicellular long-winged, winged species of single-cellwidth, etc. Final results showed that seed surface ornamentation has ineffective evidenceon classification in Lagerstroemia L. and L.indica L..