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United States Department of Agriculture (USDA) 2018

Genetic Improvement of Peanut for Production in the Southwest United States Region

Peanut Production Genetic

United States Department of Agriculture (USDA) Agricultural Research Service (ARS)

Titre : Genetic Improvement of Peanut for Production in the Southwest United States Region

Identification : 3072-21220-008-00-D

Pays : Etats Unis

Durée : Start Date : Jan 31, 2018 // End Date : Jan 30, 2023

Location : Wheat, Peanut, and Other Field Crops Research : Stillwater, OK

Objectifs
The long-term objective of this research is to develop and release high oleic peanut cultivars with superior oil chemistry, disease resistance, and agronomic performance. Over the next 5 years this research proposal will address the following objectives : OBJECTIVE 1 : Identify new sources of resistance to industry-relevant peanut pathogens, and use improved marker assisted selection (MAS) methods and QTL analyses to incorporate those genes into existing and new peanut cultivars. Subobjective 1A : Phenotype existing recombinant-inbred line (RIL) populations and the minicore collection from the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) for Sclerotinia blight and/or early leaf spot resistance and the U.S. mini-core germplasm collection for southern blight resistance in field trials. Subobjective 1B : Genotype existing RIL populations and the U.S. and ICRISAT mini-core germplasm collections using a 48K SNP micro-array chip for tetraploid peanut ; genotype existing RIL populations with SSR markers associated with Sclerotinia blight resistance. Analyze phenotypic and genotypic data collected in Subobjectives 1A and 1B to identify possible QTL for disease resistance and design molecular markers to be used in MAS breeding. OBJECTIVE 2 : Develop improved peanut varieties with superior genetic improvements and agronomic and plant health traits, including disease resistance, early maturity, elevated yield, oil, drought tolerance, and seed quality. Subobjective 2A : Develop and release elite high-oleic, high-yielding, and/or early maturing runner, virginia, and spanish peanut cultivars with superior resistance to Sclerotinia blight, southern blight, drought and/or pod rot that are adapted for production in the SW United States. Subobjective 2B : Phenotype U.S. peanut mini-core for drought tolerance and plant canopy architecture. Subobjective 2C : Determine effects of cover crop mixtures and rotation crops on Pythium pod rot in susceptible commercial cultivars. OBJECTIVE 3 : Discover and characterize new genes from cultivated and wild Arachis species in the U.S. National Peanut Germplasm Collection for resistance to existing and emerging diseases, such as peanut smut. Subobjective 3A : Phenotype the U.S. mini-core collection and other germplasm for resistance to peanut smut and develop new methodologies for high-throughput screening of peanut pods for the presence of peanut smut. Subobjective 3B : Conduct crossing experiments between smut resistant germplasm and U.S. peanut cultivars to develop and release new smut resistant peanut varieties suitable for production in the Southwestern U.S. Subobjective 3C : Phenotype wild Arachis species for resistance to Sclerotium rolfsii.

Présentation : USDA (ARS)

Page publiée le 30 novembre 2021