RICE SCIENCE ›› 2012, Vol. 19 ›› Issue (1): 1-7.

• Research Paper •     Next Articles

Identification and Genetic Mapping of a Lesion Mimic Mutant in Rice

  1. 1Laboratory of Plant Genetics and Functional Gene, College of Life and Environment Science, Shanghai Normal University, Shanghai 200234, China; 2Institute of Plant Physiology & Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China; 3National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
  • Online:2012-03-28 Published:2012-03-01
  • Contact: TENG Sheng ; DONG Yan-jun
  • Supported by:

    the National Basic Research Program of China (Grant No. 2009CB119000), the National Science Foundation of China (Grant Nos. 31000094, 31100188 and 30970246).

Abstract: A lesion mimic stripe mutant, designated as lms1 (lesion mimic stripe 1), was obtained from the M2 progeny of a 60Co γ-radiation treated japonica rice variety Jiahua 1. The lms1 mutant displayed propagation type lesions across the whole growth and developmental stages. Physiology and histochemistry analysis showed that the mutant exhibited a phenotype of white stripe when grown under high temperature (30 °C), and the lesion mimic caused by programmed cell death under low temperature (20 °C). The genetic analysis indicated that this lesion-mimic phenotype is controlled by a single locus recessive nuclear gene. Furthermore, by using simple sequence repeat markers and an F2 segregating population derived from two crosses of lms1 × 93-11 and lms1 × Pei’ai 64S, the lms1 gene was mapped between markers Indel1 and MM0112-4 with a physical distance of 400 kb on chromosome 6 in rice.

Key words: rice, lesion mimic mutant, gene mapping