A doubled haploid population, consisting of 81 DH lines derived from the F 1 hybrid of a cross between an indica cultivar and a japonica cultivar, was used to map quantitative trait loci (QTL) controlling numbers of vascular bundles in peduncle, primary rachis branches and the ratio of vascular bundles to primary rachis branches (V/R ratio).

QTLs controlling panicle and panicle base vascular bundle characteristics were detected in 176 F2 population derived from a cross between super japonica rice ‘Shennong265’ and japonica rice cultivars ‘Lijiangxintuanheigu’.

The characteristics of vascular bundle of peduncle and grain-filling in two-line hybrid rice were studied.

Characteristics of the vascular bundles in the panicle and their relations to the grain-filling for the different panicle types of rice;

The relations between panicle characters of intersubspecific heavy panicle hybrid rice and vascular bundles in neck panicle;

Correlation between the structure of vascular bundle and the content of aloin in Aloe;