Abnormal anther development leads to lower spikelet fertility in rice (Oryza sativa L.) under high temperature during the panicle initiation stage

Table 1 Effects of high temperature treatment on yield and yield components in LYPJ and SY63

Cultivars	Treatment	Yield	Panicles	Spikelets	Seed setting percentage	1000-grain weight	Biomass
		g plant⁻¹	No. plant^− 1	No. panicle^− 1	%	g	g plant^− 1
LYPJ	CK	20.7 ± 1.4 ^a	11.3 ± 0.3 ^a	153.2 ± 5.2 ^a	53.3 ± 0.8 ^a	22.3 ± 0.6 ^a	87.0 ± 1.3 ^{a *}
LYPJ	HT	3.3 ± 0.8 ^b	11.0 ± 0.0 ^a	100.2 ± 6.5 ^b	16.4 ± 4.5 ^b	18.5 ± 0.1 ^b	81.4 ± 0.7 ^a
SY63	CK	25.5 ± 0.8 ^a	11.3 ± 0.3 ^a	115.3 ± 5.7 ^a	81.1 ± 1.0 ^{a *}	24.2 ± 0.5 ^{a *}	75.3 ± 3.4 ^a
SY63	HT	21.0 ± 1.4 ^a*	11.0 ± 0.6 ^a	130.9 ± 2.2 ^a	65.1 ± 4.7 ^a*	22.5 ± 0.5 ^a*	69.7 ± 3.2 ^a

CK control temperature, HT high temperature. Data are the average of three replicates ± standard error (n = 3). The different superscript lower-case letters indicate significance between the temperature treatments for the same cultivar at P < 0.05. Asterisk indicates significance between the two cultivars for same temperature treatment at P < 0.05

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