Full Length Research Paper

Inheritance and identification of SCAR marker linked to bacterial wilt-resistance in eggplant

Cao Bi-hao*, Lei Jian-jun, Wang Yong and Chen Guo-ju

College of Horticulture, South China Agriculture University, Guangzhou 510642, Guangdong Province, PR China.

*Corresponding author. E-mail: caobh01@163.com. Tel: +86 20 8528 0228.

Fax: +86 20 85282107.

Accepted 17 September, 2009

   Abstract

In the present work, the combinations (F₁) were crossed between highly resistant and susceptible to bacterial wilt eggplant parents and its F₂, BC₁ segregation population plants were inoculated with race1 of Ralstonia solanacearum in greenhouse. In this paper, we reported that the inheritance of bacterial wilt resistance in eggplant was controlled by a single dominant gene showing Mendelian inheritance model. In addition, a 762 bp molecular marker linked to a bacterial wilt-resistant gene of eggplant was screened by the bulked segregant analysis (BSA) method and sequence characterized amplified region (SCAR) marker linked to bacterial wilt-resistance gene was also obtained. The genetic distance between this marker and the resistance gene is 3.33 cM

Key word: Eggplant, bacterial wilt-resistance, molecular marker, inheritance.