Differentiation of a Miniature Inverted Transposable Element (MITE) System in Asian Rice C

Differentiation of a Miniature Inverted Transposable Element (MITE) System in Asian Rice Cultivars and Its Inference for a Diphyletic Origin

of Two Subspecies of Asian Cultivated Rice

佚名

【期刊名称】《植物学报（英文版）》 【年(卷),期】2006(048)003

【摘要】In the present study, we report a survey on a Miniature Inverted Transposable Element (MITE) system known as mPing in 102 varieties of Asian cultivated rice (Oryza sativa L.). We found that mPing populations could be generalized into two families, mping-1 and mPing-2, according to their sequence structures. Further analysis showed that these two families of mPing had significant bias in their distribution pattern in two subspecies of rice, namely O. sativa ssp. japonica and indica. O. sativa japonica has a higher proportion of mPing-1 as a general trait, whereas O. sativa indica has a higher proportion of mPing-2. We also examined the mPing system in a doubled haploid (DH) cross-breeding population of jingxi 17 (japonica) and zhaiyeqing 8 (indica) varieties and observed that the mPing system was not tightly linked to major subspecies-determining genes.Furthermore, we checked the mPing system in 28 accessions of Asian common wild rice O. rufipogon and found the mPing system in O. rufipogon. The distribution pattern of