Identification of QTLs for Plant Height and Its Components by Using Single Segment Substitution Lines in Rice （Oryza sativa）

QTLs for plant height and its components on the substituted segments of fifty-two single segment substitution lines (SSSLs)in rice were identified through t-test (P≤0.001) for comparison between each SSSL and recipient parent Huajingxian 74. On the 14 substituted segments, 24 QTLs were detected, 10 for plant height, 2 for panicle length, 4 for length of thefirst internode from the top,5 for length of the second internode from the top and 3 for length of the third internode from the top, respectively. All these QTLs were distributed on nine rice chromosomes except chromosomes 5, 9 and 11. The additive effect ranged from -4.08 to 3.98 cm, and the additive effect percentages varied from -19.35% to 10.43%.