Anumalla, M. | bioRxiv Science

bioRxiv2024

Draft genome analysis of Delftia tsuruhatensis IICT-RSP4, a strain with uricase potential isolated from soil

Delftia tsuruhatensis IICT-RSP4, an uricase producing bacterium was isolated using i-chip method from soil and characterized. Here, we report the draft genome sequence of D. tsuruhatensis IICT-RSP4. The genome data comprised of 6,627,718bp (6.6 MB) with a GC content of 66.6% with 7 protein encoding genes, 346 sub-systems with 6165 coding sequences and 112 RNAs. The genome revealed five functional secondary metabolite biosynthetic gene clusters viz. terpene, resorcinol, NRP+PKS, T2PKS, and RiPPS related to antimicrobial, anticancer and antimalarial functionality. In vitro, screening studies revealed the uricase potential of the strain D. tsuruhatensis IICT-RSP4. This is the first report on the whole genome sequence of an uricase-producing D. tsuruhatensis IICT-RSP4.

bioinformatics↗

bioRxiv2023

Genetic Gains in IRRIs Rice Salinity Breeding and Elite Panel Development as a Future Breeding Resource

Genetic gain is a crucial parameter to check the breeding programs success and help optimize future breeding strategies for enhanced genetic gains. In this work, IRRIs historical data from the Philippines and Bangladesh of the salinity breeding program was used to estimate the genetic gains and identify the best lines based on higher breeding values for yield as a future genetic resource. Two-stage mixed-model approach accounting for experimental design factors and pedigrees was adopted to obtain the breeding values for yield and estimate genetic trends under the salinity conditions. A positive genetic trend of 0.1% per annum with a yield advantage of 1.52 kg/ha for the Philippines and 0.31% per annum with a yield advantage of 14.02 kg/ha for Bangladesh datasets was observed. For the released varieties, genetic gain was 0.12% per annum with a yield advantage of 2.2 kg/ha/year and 0.14% per annum with a yield advantage of 5.9 kg/ha/year, respectively. Further, based on higher breeding values for grain yield, a core set of the top 145 genotypes with higher breeding values of >2400 kg/ha in the Philippines and >3500 kg/ha in Bangladesh with a selection accuracy >0.4 were selected for formulating the elite breeding panel as a future breeding resource. Conclusively, higher genetic gains are pivotal in IRRIs rice salinity breeding program, which requires a holistic breeding approach with a major paradigm shift in breeding strategies to enhance genetic gains. Key MessageEstimating genetic gains and formulating a future salinity elite breeding panel for rice pave the way for developing better high-yielding salinity tolerant lines with enhanced genetic gains.

genetics↗