Improving the blast, bacterial blight, and brown planthopper resistance for a restorer line of WDR Hanhui3 by marker-assisted gene pyramiding.

ABSTRACT:

Background

The widespread cultivation of water-saving and drought-resistance rice (WDR) represents a crucial strategy for sustainable agriculture in water-limited environments. Hanyou73, an elite WDR hybrid derived from the restorer line Hanhui3, exhibits outstanding drought resistance and stable yield performance. However, its susceptibility to blast, bacterial blight (BB), and brown planthopper (BPH) constrains its long-term cultivation stability.

Results

Three major resistance genes Pi9 (blast), Xa23 (BB) and Bph6 (BPH) were successfully pyramided into Hanhui3 via marker-assisted backcross breeding. The resulting improved line, Hanhui303, retained 96.68% of the recurrent parent genome (RPG). Furthermore, Hanhui303 and Hanhui3 were indistinguishable using 48 standard SSR m

SUBMITTER: Chen J 

PROVIDER: S-EPMC12751374 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature