Characteristics of superior soybean breeding lines tolerance to rust (Phakopsora pachyrhizi Syd.)  

Oleh:

Inayati, Alfi ; Yusnawan, Eriyanto

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Biosaintifika: Journal of Biology & Biology Education vol. 8 no. 1 (2016), page 47-55.
Topik: soybean genotype; rust disease; evaluation; resistance; tolerant
Fulltext: 5081-12378-1-PB_Ros.pdf (619.88KB)

Isi artikel

Soybean rust caused by Phakopsora pachyrhizi is one of the most important diseases which limits soybean production.?? ? ? ? ? ?? ?v? ? The aim of this study was to evaluate the resist-ance of 28 superior soybean lines and their tolerance to rust. The study ?? was con-ducted at a screen house and arranged in a completely randomized design (CRD); three replications. All genotypes tested were artificially inoculated with P. pachyrhizi, and a set of un-inoculated genotypes was planted as a comparison. Number of pustules was recorded weekly, and resistant criteria was rated based on the Interna-tional working group on soybean rust IWGSR method. Lesion color (LC), sporula-tion level (SL), number of uredia (NoU), frequency of pustule which had uredia, and yield were also recorded. Among 28 genotypes tested, only one was categorized as resistant and 2 genotypes were susceptible. Resistant genotypes had few pustules, lower AUDPC values, low disease severity, and Reddish Brown lesion type. Soy-bean rust affected yield components, i.e. number of intact pods and yield per plant. Yield loses due to rust in this study varied from 5-89%, and the average was 51%. The set of lines from Tanggamus pedigree showed more resistant to rust but less tolerant compared to Sinabung pedigree.

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