In the silkworm, Bombyx mori, nonsusceptibility to B. mori densonucleosis virus type-2 (BmDNV-2) is controlled by a recessive gene, nsd-2 (nonsusceptibility to DNV-2). We investigated the genetic linkage between two random-amplified polymorphic DNA (RAPD) markers and the +nsd-2 gene. Initially, we constructed the JSD-2 strain (nsd-2/+), which is congenic to strain J137 (nsd-2/nsd-2) with respect to the chromosome containing the +nsd-2 gene, starting with a female of strain J137 and a male of strain C137 (+nsd-2/+nsd-2). Genomic DNAs were compared between infected individuals of the JSD-2 strain and J137 by a polymerase chain reaction (PCR) with 700 arbitrary 10-mer primers. Two RAPD markers (OPH19R and OPP01R) linked to the +nsd-2 gene were found. For the crossing-over experiment, a female of J137 was crossed with a male (nsd-2/+) of JSD-2. Segregation analysis showed that the most closely linked RAPD marker (OPP01R) was mapped 4.7 cM distant from +nsd-2.
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http://dx.doi.org/10.1266/ggs.75.93 | DOI Listing |
<b>Background and Objective:</b> Black soybeans [<i>Glycine max</i> (L.) Merr] are among the important crops, but the cultivated resources are normally low-yielding, susceptible to diseases and low profit. Therefore, it is necessary to evaluate the genetic diversity of black soybean germplasms for breeding programs.
View Article and Find Full Text PDFBraz J Biol
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Universidade Federal da Paraíba - UFPB, Centro de Ciências Agrárias - CCA, Areia, PB, Brasil.
Portulaca umbraticola, commonly known as "Eleven o'clock", is a popular ornamental plant in Brazil, but its potential as a non-conventional food source remains underexplored. Assessing its genetic and cytogenetic diversity is crucial for breeding and selecting optimal accessions. In this study, we analyzed the genetic diversity of P.
View Article and Find Full Text PDFPhysiol Plant
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Horticulture Crops Research Department, Hormozgan Agricultural and Natural Resources Research and Education Center, AREEO, Bandar Abbas, Iran.
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View Article and Find Full Text PDFWorld J Microbiol Biotechnol
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Laboratory of Biodiversity and Valorization of Arid Areas Bioresources (BVBAA), Faculty of Sciences of Gabes, University of Gabes Erriadh, 6072, Zrig, Tunisia.
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View Article and Find Full Text PDFFront Biosci (Schol Ed)
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School of Biosciences, University of Kent, CT2 7NJ Canterbury, Kent, UK.
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