Climate Change and Southern Rust (Puccinia polysora Underw.) Infection on Corn Cultivars in Korea
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Date
2013
Journal Title
Journal ISSN
Volume Title
Publisher
Badan Penelitian dan Pengembangan Pertanian
Abstract
Southern rust is considered as a tropical disease reducing corn (Zea mays L.) production. We found
similar symptoms at Kunwi Farm in 2006. We have carried out four sets trials of Silage 1 (69B x P45) and Silage 2
(51B x P45) in Jeju and Kunwi in 2008 and 2009, respectively. Materials of P45, 69B and 51B were obtained from
Kyungpook National University (KNU) gene bank to develop resistant inbred lines. We used a possibility random
mating to all genotypes. Field experiments were designed in a RCBD with three replications. Important agronomic
traits were rated and analyzed with SAS 9.1 program, 2005. In Jeju, Southern rust infection was confirmed with
highly significant different (P=0.001) for both Silage 1 and Silage 2. The infection was highly positive correlation
(y=1.565 + 0.708x; r2=0.433 and y=2.468 + 0.483x; r2=0.358) with commercial value for Silage 1 and Silage 2,
respectively. In Kunwi, the disease was also confirmed with significant (P=0.041) and highly significant (P=0.001)
different for Silage 1 and Silage 2, respectively. The infections were low (y=2.337 + 0.372x; r2=0.202) and highly
(y=1.596 + 0.517x; r2=0.371) positive correlation for Silage 1 and Silage 2, respectively.