Genetic dissection of internode length above the uppermost ear in four RIL populations of maize (Zea mays L.).
Genetic dissection of internode length above the uppermost ear in four RIL populations of maize (Zea mays L.).
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玉米 (Zea mays L.) 四个 RIL 群体最上穗上方节间长度的遗传剖析
DOI：
10.1534/g3.114.016378
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发表时间：
2014-12-23
期刊：
影响因子：
--
通讯作者：
Chen Y
中科院分区：
文献类型：
--
作者：
Ku L;Cao L;Wei X;Su H;Tian Z;Guo S;Zhang L;Ren Z;Wang X;Zhu Y;Li G;Wang Z;Chen Y
玉米穗上节间长度是影响冠层构型的重要因素。分析节间长度的遗传特性，对于改善植物群体结构、提高光合效率具有重要意义。然而，ILAU的遗传控制尚未确定。利用4个重组自交系（RIL）群体，在3个环境下，对穗上部以上5个位置的节间长度进行了QTL定位。遗传图谱和初始QTL整合使用荟萃分析在四个群体。鉴定了70个QTL：群体1中16个;群体2中14个;群体3中25个;群体4中15个。表型变异的个体效应在5.36%~ 26.85%之间，有27个QTL > 10%。此外，在两个群体中鉴定了以下共同QTL：所有五个位置的节间长度的一个共同QTL;三个位置的节间长度的一个共同QTL;以及一个位置的节间长度的一个共同QTL。此外，在一个群体中还检测到了4个控制节间长度的QTL。结果表明，穗上不同部位的ILAU可能受同一个或多个QTL的影响。这些性状也可能受许多不同的QTL调控。在70个初始QTL中，有46个整合到14个元QTL（mQTL）中，27个R2 >10%的初始QTL中有17个整合到7个mQTL中。 4个初始QTL R2 >10%的关键mQTL（mQTL 2 -2、mQTL 3 -2、mQTL 5 -1、mQTL 5 -2和mQTL 9）包括来自一个或两个群体的4 - 11个与4 - 5个节间长度相关的初始QTL。这些结果可为标记辅助选择提供有用的信息，以改善冠层结构。
The internode length above the uppermost ear (ILAU) is an important influencing factor for canopy architecture in maize. Analyzing the genetic characteristics of internode length is critical for improving plant population structure and increasing photosynthetic efficiency. However, the genetic control of ILAU has not been determined. In this study, quantitative trait loci (QTL) for internode length at five positions above the uppermost ear were identified using four sets of recombinant inbred line (RIL) populations in three environments. Genetic maps and initial QTL were integrated using meta-analyses across the four populations. Seventy QTL were identified: 16 in population 1; 14 in population 2; 25 in population 3; and 15 in population 4. Individual effects ranged from 5.36% to 26.85% of phenotypic variation, with 27 QTL >10%. In addition, the following common QTL were identified across two populations: one common QTL for the internode length of all five positions; one common QTL for the internode length of three positions; and one common QTL for the internode length of one position. In addition, four common QTL for the internode length of four positions were identified in one population. The results indicated that the ILAU at different positions above the uppermost ear could be affected by one or several of the same QTL. The traits may also be regulated by many different QTL. Of the 70 initial QTL, 46 were integrated in 14 meta-QTL (mQTLs) by meta-analysis, and 17 of the 27 initial QTL with R2 >10% were integrated in 7 mQTLs. Four of the key mQTLs (mQTL2-2, mQTL3-2, mQTL5-1, mQTL5-2, and mQTL9) in which the initial QTL displayed R2 >10% included four to 11 initial QTL for an internode length of four to five positions from one or two populations. These results may provide useful information for marker-assisted selection to improve canopy architecture.
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影响因子：
11.6
作者：
Griffiths, Jayne;Murase, Kohji;Thomas, Stephen G.
通讯作者：
Thomas, Stephen G.
影响因子：
5.4
作者：
Li, J. Z.;Zhang, Z. W.;Zhou, Y. G.
通讯作者：
Zhou, Y. G.
影响因子：
2.3
作者：
KOESTER, RP;SISCO, PH;STUBER, CW
通讯作者：
STUBER, CW
影响因子：
3.3
作者：
Frascaroli, Elisabetta;Cane, Maria Angela;Pe, Mario Enrico
通讯作者：
Pe, Mario Enrico
影响因子：
5.8
作者：
Arcade, A;Labourdette, A;Joets, J
通讯作者：
Joets, J