Do transgenesis and marker-assisted backcross breeding produce substantially equivalent plants? - A comparative study of transgenic and backcross rice carrying bacterial blight resistant gene Xa21

Table 1 Major agronomic traits of four rice plants studied

Sample	Lesion length (cm)	Plant height (cm)^a	Tillers	Panicle length (cm)^b	Seed ratio (%)	1000-grains weight (g)
D62B	10.0±2.7	88.4±4.3	11±3	23.9±1.2	94±3.0	25.8±2.8
DXT	0.4±0.3^#	86.3±2.0	10±1	24.2±0.9	93±4.7	25.8±2.2
DXB	1.2±0.4^#	85.5±3.4	12±2	23.8±1.1	93±2.9	26.0±1.7
MH86	11.3±1.9	113.1±2.8*	10±2	27.0±1.7*	80±5.8*	27.1±1.0

Data included are averages of at least 5 individual plants from which 3 infected leaves (a) or panicles (b) were scored. * represents a significant levels of p < 0.01 beween D62B and MH86 (t-test). # represents the significant levels of p <0.01 in DXT and DXB with D62B as the control.D62B: the recipient control; DXT: transgenic line with Xa21; DXB: MAB line with Xa21; MH86: another rice variety.

ISSN: 1471-2164