Title

水稻穗幹物質重發育動態的QTL定位

Translated Titles

QTL Mapping for Developmental Behavior of Panicle Dry Weight in Rice

Authors

何慈信(Ci-Xin He);朱軍(Jun Zhu);嚴菊強(Ju-Qiang Yan);Mebrouk Benmoussa;吳平(Ping Wu)

Key Words

條件QTL分析 ; 發育數量遺傳 ; 水稻 ; 穗部幹物質重 ; Conditional QTL analysis ; Developmental quantitative genetics ; Rice ; Panicle dry weight

PublicationName

中國農業科學

Volume or Term/Year and Month of Publication

33卷1期(2000 / 02 / 01)

Page #

24 - 32

Content Language

簡體中文

Chinese Abstract

以秈稻品種IR64和粳稻品種Azucena及其DH群體(123個DH系)爲遺傳研究材料,在穗幹物質積累的不同時期測定穗重。利用包括RFLP、同工酶標記和RAPD等175個分子標記的水稻連鎖圖譜,採用條件複合區間作圖法對水稻穗部幹物質積累進行QTL的動態定位。在各時其能檢測到14個非條件QTL,而最終穗重只難檢測到3個非條件QTL。條件QTL分析表明,基因在水稻發育過程中以一定的時空方式表達。親本和極端個體的QTL總效應分析表明,增效基因和減效基因在不同個體中的累積程度不同。控制穗幹物質積累的發育過程在兩組基因,一組基因控制稻穗穀粒內外穎的發育,另一組基因可能控制穀粒的內容物的充實。

English Abstract

A population of 123 double haploid (DH) lines, derived from a cross between an indica variety 1R64 and japonica variety Azucena was used in this study. The panicle dry weight at different stages was measured at 10-day intervals. Based on the rice genetic linkage map of 175 molecular markers, including RFLP, enzyme markers and RAPD, QTLs for the developmental behavior of panicle dry weight were determined dynamically using composite interval mapping method in combination with the conditional analysis method. The number of unconditional QTLs for panicle dry weight detected for time-dependent measure was 14. However, only 3 QTLs were detected at the final stage. Conditional QTL analysis of rice panicle dry matter accumulation could provide an insight into both spatial and temporal patterns of gene expression. By comparing the sum of QTL additive effects for parents with that for extreme ideal individuals, we found that the alleles of positive or negative gene effects were dispersed in various individuals. The result also indicates that two sets of genes might be involved in the process of panicle dry matter accumulation. The development of the husk of rice kernel, lemma and palea is determined by one set of genes, while that of the rice kernel content is controlled by the other set of genes.

Topic Category 生物農學 > 農業
生物農學 > 森林
生物農學 > 畜牧
生物農學 > 漁業