Identification and characterization of Rht25, a locus on chromosome arm 6AS affecting wheat plant height, heading time, and spike development

MO, YOUNGJUN*; VANZETTI, LEONARDO S.*; HALE, IAGO; SPAGNOLO, EMILIANO J.; GUIDOBALDI, FABIO; AL-OBOUDI, JASSIM; ODLE, NATALIE; PEARCE, STEPHEN; HELGUERA, MARCELO; DUBCOVSKY, JORGE

THEORETICAL AND APPLIED GENETICS

SPRINGER

Lugar: Berlin; Año: 2018

0040-5752

Understanding genes regulating wheat plant height is important to optimize harvest index and maximize grain yield. In modern wheat varieties grown under high-input conditions, the gibberellin-insensitive semi-dwarfing alleles Rht-B1b and Rht-D1b have been used extensively to confer lodging tolerance and improve harvest index. However, negative pleiotropic effects of these alleles (e.g., poor seedling emergence and reduced biomass) can cause yield losses in hot and dry environments. As part of current efforts to diversify the dwarfing alleles used in wheat breeding, we identified a quantitative trait locus (QHt.ucw-6AS) affecting plant height in the proximal region of chromosome arm 6AS (