Abstract:

【Objective】 The objective of this study was to identify QTL controlling partial yield traits in kenaf which could promote the basic scientific research of molecular marker-assisted selection. 【Method】In this investigation, a population with 162 F2:3 individuals from the cross between Alian kenaf (from Egypt) and Fuhong 992 (from Fujian Agriculture and Forestry University) with fine qualities, high yield and disease resistance was used and two location field tests were conducted. A randomized complete block design was used, to charactererize six yield traits: plant height, stem diameter, number of nodes, fresh bark weight per plant, dry bark weight per plant, 1000-seed weight. By using the data of field tests and MCIM method, six important yield traits were located and their genetic interactions were analyzed. 【Result】 Correlation analysis of field performance indicated significant positive correlation among all the traits except 1000-seed weight. As a result, two QTLs of plant height, two QTLs of stem diameter, two QTLs of number of nodes, one QTL of fresh bark weight per plant, and two QTLs of dry bark weight per plant, and two QTLs of 1000-seed weight were mapped in two places. 【Conclusion】 The eleven QTLs identified mainly clustered in linkage groups 6, 11, 14, 9, 13, 17 and 4, and all of these QTL distributed unevenly on chromosomes and tended to cluster together.

Key words: kenaf (Hibiscus cannabinus L.), yield traits, quantitative trait loci (QTL)