Genetic Variation and Agronomic Characters of Bambara Groundnut (Vigna subterranea L. Verdc.) Lines Results of Pure Line Selection from Sukabumi Lanras

Bambara groundnut is a legume plant that has several advantages, including droughttolerance, has ability to grow on infertile land and high nutrient content. The production ofbambara groundnut is still low, so it is necessary to obtain high yielding bambara groundnut line.The experiment was conducted to evaluate the genetical variation and agronomic characters of 30bambara groundnut lines. This experiment was carried out in experimental field of SEAMEOBIOTROP Tajur Bogor (± 280 m above sea level), on Februari-June 2018. Plant materials used inthis research were 30 bambara groundnut lines derived from pure line selection of Sukabumilandrace and unselected Sukabumi landrace uses as control. The experiment was arranged in arandomized complete block design with three replications. Results showed that there werevariations among several agronomic characters of bambara groundnut lines. Several lines showedsuperior characters. R59.30, A90.8, A41.4, A56.10, A43.5, A103.5, A41.4, A55.8, R59.31 andA28.10 lines were lines with the higest dry pods weight compared to the other lines and controlline. These lines had potential as new superior varieties of bambara groundnut.Keywords: landrace, new superior variety, pure line selection

The Association of Flowering Time Quantitative Trait Loci with Duplicated Regions and Candidate Loci in Brassica oleracea

A population of 150 doubled haploid lines of rapid cycling Brassica oleracea, derived from an F1 from a var. alboglabra × var. italica cross, was scored for flowering time in two trials. Using information on 82 mapped molecular markers, spread evenly across the nine linkage groups, QTL were identified at six locations; one each on linkage groups O2 and O3 and two each on linkage groups O5 and O9. In total, these QTL explained 58 and 93% of the genetical variation in the two trials. Three of these QTL, on linkage groups O2, O3, and O9, were situated in regions showing considerable homology both with each other and with chromosome regions of B. nigra that have been shown to affect flowering time. These same regions are all homologous to a single tract of Arabidopsis chromosome 5, which contains a number of the flowering-related genes, one or more of which may be candidates for the QTL found in Brassica.