Location: Crop Genetics and Breeding Research
Project Number: 6048-21000-029-015-R
Project Type: Reimbursable Cooperative Agreement
Start Date: Jul 1, 2020
End Date: Feb 28, 2022
Objective:
1. Continue hybridization program to combine resistance to the peanut root-knot nematode (PRN) with important characteristics such as high yield, high oleic acid and resitance to other diseases (tomato spotted wilt virus (TSWV), leaf spot, white mold).
2. Use recently developed molecular markers for disease resistance to combine resistance to leaf spot with high yield and high oleic acid.
3. Continue selection and evaluation program to identify progeny that have the desired combination of resistances and agronomic performance.
4. Evaluate late generation breeding lines under variable seeding rates and fungicide spray schedules to identify combinations that will maximize farm net profits.
Approach:
Continue crossing program to combine resistances to dieases (PRN, TSWV, leaf spot, and white mold) with other desirable characteristics (eg. high yield and grades, and high oleic acid). Single seed descent is then used to rapidly advance this material to the F4 generation. F4:5 progeny are evaluated using genetic markers to improve our selection efficiency for resistance to nematodes and leaf spot, and for high oleic acid. Selections are then evaluated in field plots for resistance to TSWV, yield, grade, and other agronomic characteristics.
Continue our accelerated backcrossing program using marker assisted selection (MAS) to introgress resistance to leaf spot into high yielding genetic backgrounds adapted to Georgia. Evaluate breeding lines with high levels of resistance to leaf spot, nematodes, and TSWV in field trials. Treatments will include variable seeding rates and variable fungicide spray schedules. Data will be analyzed to identify those combinations that produce maximum net returns.
