Daily Archives: August 26, 2013

Egg Drop Syndrome Virus Prevalent in South Korean Ducks

The Poultry Site – Results from recent research demonstrate the high prevalence of EDS virus in wild and domestic ducks in South Korea and provide information on EDSV from ducks that showed variable adaptability in chickens, report S-Y. Cha of Chonbuk National University.

Together with co-authors at Kyungpook National University and the Animal, Plant and Fisheries Quarantine and Inspection Agency, they have a paper published in a recent issue of Poultry Science, in which they explain that EDS virus is an important pathogen of poultry that decreases egg production in chickens and causes respiratory disease in goslings.

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Dissecting yield-associated loci in super hybrid rice by resequencing recombinant inbred lines and improving parental genome sequences

Abstract The growing world population and shrinkage of arable land demand yield improvement of rice, one of the most important staple crops. To elucidate the genetic basis of yield and uncover its associated loci in rice, we resequenced the core recombinant inbred lines of Liang–You–Pei–Jiu, the widely cultivated super hybrid rice, and constructed a high-resolution linkage map. We detected 43 yield-associated quantitative trait loci, of which 20 are unique. Based on the high-density physical map, the genome sequences of paternal variety 93–11 and maternal cultivar PA64s of Liang–You–Pei–Jiu were significantly improved. The large recombinant inbred line population combined with plentiful high-quality single nucleotide polymorphisms and insertions/deletions between parental genomes allowed us to fine-map two quantitative trait loci, qSN8 and qSPB1, and to identify days to heading8 and lax panicle1 as candidate genes, respectively. The quantitative trait locus qSN8 was further confirmed to be days to heading8 by a complementation test. Our study provided an ideal platform for molecular breeding by targeting and dissecting yield-associated loci in rice.

Source: PNAS, 10th April, 2013
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