|GUO, XIAOHONG - University Of Georgia|
|WANG, HUI - University Of Georgia|
|PANDEY, MANISH - International Crops Research Institute For Semi-Arid Tropics (ICRISAT) - India|
|JI, XIANGYUN - University Of Georgia|
|Holbrook, Carl - Corley|
|CULBREATH, ALBERT - University Of Georgia|
|KEMERAIT, ROBERT - University Of Georgia|
|VARSHNEY, RAJEEV - International Crops Research Institute For Semi-Arid Tropics (ICRISAT) - India|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 10/29/2015
Publication Date: 10/29/2015
Citation: Guo, X., Wang, H., Pandey, M., Ji, X., Holbrook Jr, C.C., Culbreath, A.K., Kemerait, R.C., Varshney, R.K., Guo, B. 2015. Phenotypic assessments of peanut nested association mapping (NAM) populations [abstract]. University of Georgia Plant Center Retreat Meeting.
Technical Abstract: Nested association mapping (NAM) has been popular in recent years as a multi-parental mapping population due to the high-resolution trait mapping by combining the advantages of linkage analysis and association mapping. In peanut research community, two structured mapping populations were developed using two x eight (common by unique) factorial nested association mapping design, each with eight founders and a reference line. In this study, it was the first time to provide an assessment of the compositional diversity by phenotyping the population with four founders, total 8 recombinant inbred line (RIL) populations (2 x 4) and 1133 RILs. We evaluated the agronomic characters of the RILs including morphological indicators, market type variation, and disease resistance traits. Initial phenotypic assessment in the field in 2015 showed that several agronomic and morphological traits segregated within each family. Some plant trait, such as leave length and width, plant size and main stem height, exhibited a normal distribution among members of several populations. This indicates that this NAM population may be of use in QTL mapping for quantitative morphological traits in cultivated peanut. Continuing studies will examine the resistance of the population to various diseases including Tomato spotted wilt virus and early and late leaf, and pod and kernel traits. GBS, genotype-by-sequencing will be completed. Overall, this study provided here will provide significant information and genetic resources for peanut community in the development of new improved peanut lines.