Multiple major QTL lead to stable yield performance of rice cultivars across varying drought intensities.
Multiple major QTL lead to stable yield performance of rice cultivars across varying drought intensities.
复制标题
DOI：
10.1186/1471-2156-15-16
复制
发表时间：
2014-02-03
期刊：
影响因子：
2.9
通讯作者：
Kumar A
中科院分区：
文献类型：
--
作者：
Dixit S;Singh A;Sta Cruz MT;Maturan PT;Amante M;Kumar A
灌溉水的供应正在成为水稻种植的一个主要限制因素。干旱地区的生产尤其受到干旱事件的影响，因为这些地区通常种植高产耐旱水稻（Oryza sativa L.）。品种以产量（戈伊）为选择标准，采用群体分离分析（BSA），鉴定出了几个大效应QTL。在由IR 55419 -04/2* TDK 1杂交产生的BC 1F 3：4群体上进行QTL定位研究，目的是在来自老挝人民民主共和国的流行品种TDK 1的背景下鉴定大效应QTL。本研究确定了干旱条件下籽粒产量的3个QTL，即qDTY 3.1（RM 168-RM 468）、qDTY 6.1（RM 586-RM 217）和qDTY 6.2（RM 121-RM 541）。qDTY 3.1和qDTY 6.1在低地干旱胁迫条件下表现出跨季节的一致效应，而qDTY 6.1和qDTY 6.2在高地和低地干旱条件下均表现出效应。通过QTL类分析进行的QTL效应检验显示qDTY 3.1和qDTY 6.1的互补性。这两个QTL在作图群体中的不同成熟度组之间显示出特定的效应模式，并且与具有单个或无QTL的那些相比，具有两个QTL的品系在整个胁迫水平下的籽粒产量具有更高的稳定性。本研究为干旱条件下水稻产量的大效应QTL及其在单个QTL和不同组合中的效应提供了一个清晰的认识。该研究还开辟了一个机会，通过标记辅助回交育种开发TDK 1的耐旱版本，并导致了一个大规模的QTL定位计划，旨在将这些QTL与Sub1结合在TDK 1作为受体品种的背景下。
Availability of irrigation water is becoming a major limiting factor in rice cultivation. Production in rainfed areas is affected in particular by drought events, as these areas are commonly planted to high-yielding drought-susceptible rice (Oryza sativa L.) varieties. The use of bulk segregant analysis (BSA), taking grain yield (GY) as a selection criterion, has resulted in the identification of several large-effect QTL. A QTL mapping study was undertaken on a BC1F3:4 population developed from the cross IR55419-04/2*TDK1 with the aim of identifying large-effect QTL in the background of TDK1, a popular variety from Lao PDR. The study identified three QTL—qDTY 3.1 (RM168-RM468), qDTY 6.1 (RM586-RM217), and qDTY 6.2 (RM121-RM541)—for grain yield under drought. qDTY 3.1 and qDTY 6.1 , showed consistent effect across seasons under lowland drought-stress conditions while qDTY 6.1 and qDTY 6.2 showed effect under both upland and lowland drought conditions. The test of QTL effect, conducted through a QTL class analysis, showed the complimentary nature of qDTY 3.1 and qDTY 6.1 . Both QTL showed specific patterns of effect across different maturity groups within the mapping population and higher stability for grain yield was seen across stress levels for lines with both QTLs as compared to those with single or no QTL. The study offers a clear understanding of large-effect QTL for grain yield under drought and their effect as individual QTL and in various combinations. The study also opens up an opportunity to develop a drought-tolerant version of TDK1 through marker-assisted backcross breeding and has led to a large-scale QTL pyramiding program aiming to combine these QTL with Sub1 in the background of TDK1 as recipient variety.
登录
查看更多内容
影响因子：
9.4
作者：
Dasgupta, T;Hossain, SA;Price, AH
通讯作者：
Price, AH
影响因子：
2.9
作者：
Vikram P;Swamy BP;Dixit S;Ahmed HU;Teresa Sta Cruz M;Singh AK;Kumar A
通讯作者：
Kumar A
影响因子：
64.8
作者：
Matsumoto, T;Wu, JZ;Sugiura, M
通讯作者：
Sugiura, M
影响因子：
5.8
作者：
Ghimire, Krishna Hari;Quiatchon, Lenie A.;Kumar, Arvind
通讯作者：
Kumar, Arvind
影响因子：
5.8
作者：
Vikram, Prashant;Swamy, B. P. Mallikarjuna;Kumar, Arvind
通讯作者：
Kumar, Arvind