Inheritance and quantitative trait locus analysis of low-light tolerance in cucumber (Cucumis sativus L.)

被引：2
|
作者：
Li, D. D. [1 ,2 ]
Qin, Z. W. [1 ,2 ]
Lian, H. [1 ]
Yu, G. B. [1 ]
Sheng, Y. Y. [1 ]
Liu, F. [1 ]
机构：
[1] Heilongjiang Bayi Agr Univ, Coll Agron, Daqing, Heilongjiang, Peoples R China
[2] Northeast Agr Univ, Coll Hort, Harbin, Heilongjiang, Peoples R China
来源：
GENETICS AND MOLECULAR RESEARCH | 2015年 / 14卷 / 03期
关键词：
Cucumber (Cucumis sativus L.); Low-light tolerance; Seedling; Classical genetic analysis; QTLs; MARKER-ASSISTED SELECTION; CHLOROPHYLL CONTENT; BACTERIAL-BLIGHT; GENE-CLUSTER; RESISTANCE; QTLS;
D O I：
10.4238/2015.September.9.2
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The low-light tolerance index was investigated in a set of 123 F-2:3 lines during the seedling stage across 2 seasons, and the heredity of low-light tolerance was assessed via different genetic analysis methods. The results of the classical analysis showed that low-light tolerance is controlled by an additive-dominant polygene, and the polygenic inheritance rate of separate generations was >30%. In addition, 5 quantitative trait loci (QTLs) exhibited a low-light tolerance index across both seasons, including 2 QTLs (Llti1.1 and Llti1.2) on the 1st linkage group (variances of 6.0 and 9.5%) and 3 QTLs (Llti2.1, Llti2.1, and Llti2.1) on the 2nd linkage group (variances of 10.1-14.0%). The classical analysis method and QTL information on the heredity of low-light tolerance showed that it is controlled by several major genes and a mini-polygene. The results will facilitate the breeding of resistance to low-light stress in cucumber.
引用
收藏
页码：10609 / 10618
页数：10
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