Characterization of near-isogenic lines carrying QTL for high spikelet number with the genetic background of an indica rice variety IR64 (Oryza sativa L.).
Characterization of near-isogenic lines carrying QTL for high spikelet number with the genetic background of an indica rice variety IR64 (Oryza sativa L.).
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DOI：
10.1270/jsbbs.62.18
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发表时间：
2012-03
期刊：
影响因子：
2.4
通讯作者：
Kobayashi N
中科院分区：
文献类型：
--
作者：
Fujita D;Tagle AG;Ebron LA;Fukuta Y;Kobayashi N
每穗总颖花数是与水稻产量潜力相关的重要性状之一。该性状在一组334个染色体片段渐渗系（IL：BC3衍生系）中进行评估，所述渐渗系从作为供体亲本的新植物类型（NPT）品种开发并且具有籼型水稻品种IR 64的遗传背景。在334个中间系中，选择了5个具有不同供体亲本且TSN显著高于IR 64的系进行遗传分析。使用IR 64与这些IL杂交产生的F2群体进行数量性状位点（QTL）分析。结果，在4号染色体长臂的共同区域上检测到一个高TSN的QTL（每个NPT供体品种一个）。该QTL的效应通过本研究中开发的5个近等基因系（NIL）的TSN增加得到证实。不同近等基因系的穗颈数存在差异，这与穗型结构中一、二、三次枝梗数有关。TSN的近等基因系和与TSN QTL连锁的SSR标记有望成为提高水稻品种产量潜力的研究和育种材料。
Total spikelet number per panicle (TSN) is one of the most important traits associated with rice yield potential. This trait was assessed in a set of 334 chromosomal segment introgression lines (ILs: BC3-derived lines), developed from new plant type (NPT) varieties as donor parents and having the genetic background of an indica-type rice variety IR64. Among the 334 ILs, five lines which had different donor parents and showed significantly higher TSN than IR64 were used for genetic analysis. Quantitative trait locus (QTL) analysis was conducted using F2 populations derived from crosses between IR64 and these ILs. As a result, a QTL for high TSN (one from each NPT donor variety) was detected on common region of the long arm of chromosome 4. The effect of the QTL was confirmed by an increase in TSN of five near-isogenic lines (NILs) developed in the present study. The variation in TSN was found among these NILs, attributing to the panicle architecture in the numbers of primary, secondary and tertiary branches. The NILs for TSN and the SSR markers linked to the TSN QTLs are expected to be useful materials for research and breeding to enhance the yield potential of rice varieties.
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影响因子：
5.8
作者：
Fujita, Daisuke;Santos, Rizza E.;Kobayashi, Nobuya
通讯作者：
Kobayashi, Nobuya
影响因子：
1.9
作者：
GUIDERDONI, E;GALINATO, E;VERGARA, G
通讯作者：
VERGARA, G
影响因子：
5.8
作者：
Kobayashi, S;Fukuta, Y;Khush, GS
通讯作者：
Khush, GS
影响因子：
5.4
作者：
Moncada, P;Martínez, CP;McCouch, SR
通讯作者：
McCouch, SR
影响因子：
5.4
作者：
Ando, Tsuyu;Yamamoto, Toshio;Yano, Masahiro
通讯作者：
Yano, Masahiro