Accelerated molecular breeding of a novel P/TGMS line with broad-spectrum resistance to rice blast and bacterial blight in two-line hybrid rice

Rice

Table 3 Blast/bacterial blight resistance and yield test for the hybrid combinations Hua Liangyou 2821 and Hua Liangyou 284 in 2015 and 2016

Trait	Hubei Rice Variety Regional Trials^a		National Rice Variety Regional Trials^b
Trait	Hua Liangyou 2821	Feng Liangyou 4 (CK)	Hua Liangyou 284	Feng Liangyou 4 (CK)
2015
Leaf blast score	3.3 ± 1.0^**	6.8 ± 1.3	2.7 ± 1.8^**	5.5 ± 2.2
Incidence score of neck blast	5.0 ± 1.6	8.0 ± 2.0	6.7 ± 0.8^*	8.7 ± 0.8
Loss score of neck blast	1.5 ± 1.0^*	7.0 ± 2.8	3.7 ± 1.0^**	7.7 ± 1.6
Lesion length of bacterial blight (cm) ^c	4.2 ± 0.9^**	10.3 ± 1.1	1.3 ± 0.2^**	8.6 ± 1.7
Yield (t ha⁻¹)	10.41 ± 1.06^*	10.11 ± 1.13	9.97 ± 1.25^**	9.42 ± 1.29
2016
Leaf blast score	3.3 ± 1.5^*	6.8 ± 1.3	3.3 ± 2.2^*	6.7 ± 1.5
Incidence score of neck blast	4.5 ± 1.9^*	8.5 ± 1.0	7.7 ± 2.4	8.7 ± 0.8
Loss score of neck blast	1.5 ± 1.0^*	7.0 ± 2.8	3.9 ± 2.1^*	7.7 ± 1.0
Lesion length of bacterial blight (cm)^c	2.0 ± 0.2^**	7.1 ± 0.7	4.7 ± 1.2^**	11.1 ± 1.3
Yield (t ha^− 1)	8.97 ± 1.35	9.04 ± 1.42	9.33 ± 1.27^*	8.88 ± 0.93

Note: ^aHubei Rice Variety Regional Trials were conducted in 9 field test sites according to methods and standards of Rice Variety Regional Trial in Hubei province. ^bNational Rice Variety Regional Trials were conducted in 21 field test sites according to methods and standards of National Rice Variety Regional Trial. ^c indicates the lesion length to Xoo isolate ZHE173. The value of traits is measured as mean ± s. d. ** and * indicate significant difference of the trait performance between the improved hybrid combinations and the control variety Feng Liangyou 4 at P < 0.01 and P < 0.05, respectively