利用单片段代换系鉴定水稻株高及其构成因素的QTL

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

通过t测验比较了单片段代换系与受体亲本华粳籼74之间的表型差异,对以6个水稻品种为供体的52个单片段代换系代换片段上株高及其构成因素的QTL进行了鉴定.以P≤0.001为阈值,在14个代换片段上共鉴定出24个QTL,包括10个株高QTL、2个穗长QTL、4个倒1节间长QTL、5个倒2节间长QTL、3个倒3节间长QTL,这些QTL分布于水稻的9条染色体上.QTL加性效应值为-4.08～3.98 cm,加性效应百分率为-19.35%～10.43%.

QTL for plant height and its components on the substituted segments of 52 single segment substitution lines （SSSLs） in rice were identified between SSSLs and the recipient parent Huajingxian 74 by t-test. On 14 substituted segments, 24 QTL were detected, 10 for plant height, 2 for panicle length, 4 for length of the first internode from the top, 5 for the length of the second internode from the top and 3 for the length of the third internode from the top, respectively. All these QTLs were distributed on 9 rice chromosomes except chromosomes 5, 9 and 1 I. The additive effect of QTL ranged from 4.08 to 3.98 cm. And the additive effect percentages of the QTL varied from 19.35% to 10.43%.