UMR de Génétique Végétale, INRA/CNRS/UPS/INA-PG, Ferme du Moulon, 91190, Gif/Yvette, France.
Published: February 2008
AI Article Synopsis
Article Abstract
The transition from vegetative to floral meristems in higher plants is determined by the coincidence of internal and environmental signals. Contrary to the photoperiod pathway, convergent evolution of the cold-dependent pathway has implicated different genes between dicots and monocots. Whereas no association between natural variation in vernalization requirement and Flowering time locus T (FT) gene polymorphism has been described in Arabidopsis, recent studies in Triticeae suggest implication of orthologous copies of FT in the cold response. In our study, we show that nucleotide polymorphisms on A and D copies of the wheat FT gene were associated with variations for heading date in a collection of 239 lines representing diverse geographical origins and status (landraces, old or recent cultivars). Interestingly, polymorphisms in the non-coding intronic region were strongly associated to flowering variation observed on plants grown without vernalization. But differently from VRN1, no epistatic interaction between FT homeologous copies was revealed. In agreement with the results of association study, the A and D copies of FT were mapped in regions including major QTLs for earliness traits in hexaploid wheat. This work, by identifying additional homeoalleles involved in wheat vernalization pathway, will contribute to a better understanding of the control of flowering, hence providing tools for the breeding of varieties with enhanced adaptation to changing environments.
Background: Understanding genetic diversity and population structure is crucial for strategizing and enhancing breeding efficiency. Wheat, a globally cultivated crop, is a significant source of daily calories for humans. To overcome challenges such as extreme climatic fluctuations, stagnant yields, and diminishing genetic variation, it is essential to develop diverse germplasms with new alleles.
State Key Laboratory of Wheat and Maize Crop Science, Henan Center for Crop genomics and Rice Engineering, College of Agronomy, Longzi Lake Campus, Henan Agricultural University, Zhengzhou 450046, China; National Wheat Engineering Research Center, College of Agronomy, Henan Agricultural University, Longzi Lake Campus, Zhengzhou 450046, China. Electronic address:
High-quality genome information is essential for efficiently deciphering and improving crop traits. Here we report a highly contiguous and accurate hexaploid genome assembly for the key wheat breeding parent Zhou8425B, an elite 1BL/1RS translocation line with durable adult plant resistance (APR) against yellow rust (YR) disease. By integrating HiFi and Hi-C sequencing reads, a 14.
Soil salinity adversely affects plant growth and development, reducing the yield of most crops, including wheat. The highly salt-tolerant wheat germplasm lines W4909 and W4910 were derived from a cross between two moderately salt-tolerant lines, the Chinese Spring (CS)/ disomic addition line AJDAj5 (AJ) and the Ph-inhibitor line (Ph-I) derived from CS/. Molecular markers for gene introgressions in W4909 and W4910 were not reported.
- Phosphorus is essential for plant growth, but its deficiency in soil limits crop yields, with SPXs playing key roles in phosphate transport and absorption in oats.
- A genome-wide analysis of 169 SPXs from hexaploid oat and related species revealed that these genes arose from duplication events and are under strong purifying selection.
- The study found that SPXs are involved in responses not only to phosphorus deficiency, but also to various abiotic stresses, with specific genes showing significant resistance to low phosphorus, salt, and drought conditions.
Division of Genetics & Plant Breeding, Faculty of Agriculture (FoA), SKUAST-Kashmir, Wadura Campus, Sopore, 193201, J&K, India; Centre for Crop and Food Innovation, WA State Agricultural Biotechnology Centre, Murdoch University, Murdoch, WA, 6150, Australia. Electronic address:
Wheat stripe rust (Puccinia striiformis f. sp. tritici, Pst) is the most damaging wheat disease, causing substantial losses in global wheat production and productivity.
