Identification and fine mapping of a new gene, BPH31 conferring resistance to brown planthopper biotype 4 of India to improve rice, Oryza sativa L

Rice

Table 1 BPH reaction score of parents, F₁, and check varieties against biotype 4 and Laguna BPH colony

Genotypes^a	Number of seedlings tested	Average resistance score	Significance^b
Reaction to BPH biotype 4 (2009–2014)
CR2711–76	201	2.33	a
Jaya	207	7.99	b
F₁ (Jaya/CR2711–76)	52	1.33	a
PTB-33	206	4.03	a
Reaction to Laguna BPH colony (2013–2015)
CR2711–76	199	3.87	b
Jaya	176	8.91	a
F₁ (Jaya/CR2711–76)	24	2.88	b
Rathu Heenati	210	3.11	b
TN-1	272	9.01	a

^a TN-1 and Jaya were used as susceptible checks and PTB-33 and Rathu Heenati were used as resistant checks
^b Least significant difference test at α <0.01