Meta-analysis of QTL involved in silage quality of maize and comparison with the position of candidate genes

被引：77

作者：

Truntzler, M. ^{[1
,2
]}

Barriere, Y. ^{[3
]}

Sawkins, M. C. ^{[2
]}

Lespinasse, D. ^{[2
]}

Betran, J. ^{[2
]}

Charcosset, A. ^{[1
]}

Moreau, L. ^{[1
]}

机构：

[1] Univ Paris 11, INRA, UMR Genet Vegetale, CNRS INA PG, Paris, France

[2] Syngenta Seeds SAS, St Sauveur, France

[3] INRA, Unite Genet & Ameliorat Plantes, Lusignan, France

来源：

THEORETICAL AND APPLIED GENETICS | 2010年 / 121卷 / 08期

关键词：

QUANTITATIVE TRAIT LOCI; CELL-WALL DIGESTIBILITY; RECOMBINANT INBRED LINES; EUROPEAN FLINT LINES; LIGNIN CONTENT; LINKAGE DISEQUILIBRIUM; DIFFERENT TESTERS; AFFECTING FIBER; MOLECULAR-BASIS; FLOWERING-TIME;

D O I：

10.1007/s00122-010-1402-x

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A meta-analysis of quantitative trait loci (QTL) associated with plant digestibility and cell wall composition in maize was carried out using results from 11 different mapping experiments. Statistical methods implemented in "MetaQTL" software were used to build a consensus map, project QTL positions and perform meta-analysis. Fifty-nine QTL for traits associated with digestibility and 150 QTL for traits associated with cell wall composition were included in the analysis. We identified 26 and 42 metaQTL for digestibility and cell wall composition traits, respectively. Fifteen metaQTL with confidence interval (CI) smaller than 10 cM were identified. As expected from trait correlations, 42% of metaQTL for digestibility displayed overlapping CIs with metaQTL for cell wall composition traits. Coincidences were particularly strong on chromosomes 1 and 3. In a second step, 356 genes selected from the MAIZEWALL database as candidates for the cell wall biosynthesis pathway were positioned on our consensus map. Colocalizations between candidate genes and metaQTL positions appeared globally significant based on chi(2) tests. This study contributed in identifying key chromosomal regions involved in silage quality and potentially associated genes for most of these regions. These genes deserve further investigation, in particular through association mapping.

引用

页码：1465 / 1482

页数：18

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