Reference "Resistance to rice tungro viruses in wild species of rice (Oryza spp.)"

Reference ID

2149

Title

Resistance to rice tungro viruses in wild species of rice (Oryza spp.)

Source

Japanese Journal of Breeding, 1993, vol. 43, pp. 247-255

Authors (3)

Kobayashi-N	Ikeda-R
Vaughan-E-A

Abstract

Wild species of rice (Oryza spp.) and African cultivated rice, O. glaberrima
STEUD, were evaluated as possible sources of resistance to rice tungro disease.
Two hundred and seven accessions, representing the genetic diversity in the
genus Oryza, were tested for resistance to rice tungro bacilliform virus (RTBV)
and rice tungro spherical virus (RTSV) infection. Of these, 49 and 15 accessions
were not infected with RTSV and RTBV, respectively, when plants were inoculated
with viruliferous green leafhopper. Three accessions of O. rufipogon GRIFF.
(International Rice Germplasm Center Acc. no. 105908, 105909 and 105910) did not
show infection with either RTSV or RTBV. In addition, two accessions of O.
officinalis WALL ex WATT (IRGC 105100 and 105365) and one each of O. rhizomatis
VAUGHAN (IRGC 103421) and O. brachyantha A.HEV. (IRGC 100115) were not infected
with either tungro viruses. Although a large number of cultivated rice have been
evaluated for resistance to tungro, cultivars resistant to RTBV have not been
found. The wild species identified as highly resistant to tungro are useful
donors in developing tungro-resistant rice germplasm.