Dunpin Xiong

Transposable elements (TEs) contribute to gene regulation and phenotypic diversity in plants. Miniature inverted-repeat TEs (MITEs) are short, non-autonomous DNA transposons (100–800 bp) that are numerically the most abundant TEs in the rice genome, and tightly associated with at least 58% of rice genes (Lu et al., 2017).

Abstract The rice paddy-direct seeding system has been widely adopted due to its low cost and convenience, whereas its application is mainly constrained by low seedling vigor, cold sensitivity, eventually resulting in reduced grain yield. Here, we show vig1a and vig1b, two allelic mutants of OsbZIP01, that both demonstrate greatly enhanced seedling vigor and chilling tolerance but differ in final grain production.

Methods Plant materials and growth conditions The slg2 mutant was identified from the NaN3-mutagenized M2 population of ZY66 (japonica). All the materials used in this study were cultivated in the experimental fields of the Institute of Genetics and Developmental Biology in Changping (40.2°N/116.2°E), Beijing during the summer or Lingshui (18.5°N, 110.0°E), Hainan province during the winter.