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Genetically diverse germplasm sets are necessary for the identification of heterotic groups in hybrid breeding programs. Assigning parental lines to identified heterotic groups may increase the efficiency of hybrid rapeseed breeding programs. In this study, the genetic diversity, population structure, relationship, and linkage disequilibrium (LD) of 995 rapeseed accessions, including improved breeding...
Soil salinization has a major effect on crop yield. Seed germination is a crucial prerequisite for the successful cultivation of rapeseed in saline soils. Limited information is available about rapeseed salt tolerance at germination stage. Here, we carried out an association mapping of salt tolerance QTLs at seed germination stage. We evaluated salt tolerance of 214 rapeseed inbred lines at germination...
Identifying and using heterotic loci in breeding programs is crucial for increasing crop yield. In this study, we planted 68 inbred lines and their 132 testcrosses at Wuhan and Xiangyang, China. We performed a phenotypic analysis of nine yield-related traits, including plant height, main inflorescence length, branch number, seeds per silique, effective silique number on the main inflorescence, thousand...
Self-incompatibility (SI) is a widespread mechanism in flowering plants that promotes outbreeding and thereby increases genetic diversity. Recognition specificity in Brassica is achieved by the interaction of the female determinant S-receptor kinase (SRK) and its ligand, the male determinant S-locus protein 11 (SP11). The interaction between SP11 and SRK triggers the signaling cascade in an S-haplotype-specific...
A self-incompatible (SI) line, S-1300, and its maintainer 97-wen135, a self-compatible (SC) line, were used to study the inheritance of maintenance for self-incompatibility in B. napus. The ratio of SI plants to SC plants from S-1300 × 97-wen135 F2 and (S-1300 × 97-wen135) × 97-wen135 was 346:260 and 249:232, fitting the expected ratio of 9:7 and 1:1, respectively. Based on these observations, here...
7–7365AB is a recessive genic male sterile (RGMS) two-type line, which can be applied in a three-line system with the interim-maintainer, 7–7365C. Fertility of this system is controlled by two duplicate dominant epistatic genes (Bn;Ms3 and Bn;Ms4) and one recessive epistatic inhibitor gene (Bn;rf). Therefore an individual with the genotype of Bn;ms3ms3ms4ms4Rf_ exhibits male sterility, whereas, plant...
Brassica napus L. is an important oilseed and fodder crop with significant heterosis for seed yield and other agronomic traits, but very little is known about the molecular basis of heterosis. As an initial step towards understanding the molecular events associated with this phenomenon, a molecular functional map of rapeseed was constructed using differentially expressed genes in hybrid identified...
Summary We have previously identified 2 RAPD and 8 AFLP markers that were associated with yellow seed coat gene in a stable and pure yellow-seeded DH line No. 2127-17, however, they were not suitable in large-scale MAS. In this paper, it reported our efforts in developing rapid and reliable SCAR and CAPS markers from the RAPD and AFLP markers. Based on the sequence information in the regions of the...
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