当前位置: X-MOL 学术J. Plant Biochem. Biot. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Introgression of a drought insensitive grain yield QTL for improvement of four Indian bread wheat cultivars using marker assisted breeding without background selection
Journal of Plant Biochemistry and Biotechnology ( IF 1.9 ) Pub Date : 2020-02-19 , DOI: 10.1007/s13562-020-00553-0
Tinku Gautam , Amardeep , Gautam Saripalli , Rakhi , Anuj Kumar , Vijay Gahlaut , D. A. Gadekar , Manoj Oak , P. K. Sharma , H. S. Balyan , P. K. Gupta

In wheat, a major yield QTL (Qyld.csdh.7AL) contributing ~ 20% to the variation for grain yield under drought was introgressed into each of the four Indian wheat cultivars (HUW234, HUW468, K307 and DBW17) with an objective to develop high yielding drought tolerant genotypes. The marker Xwmc273.3 linked to the yield QTL was used for marker assisted foreground selection, which was followed by phenotypic selection leading to the development of 55 advanced lines. These lines were evaluated during the crop seasons 2015–2016 and 2016–2017 under irrigated and rainfed conditions at two locations (Meerut and Niphad), which differed for agro-climatic conditions. Under irrigated condition at Niphad, three lines gave 14.9–25.7% higher yield relative to the corresponding genotypes HUW234 and DWB17 that were used for introgression. Similarly, under rainfed condition at Meerut, one line gave 25.5% higher yield relative to the corresponding genotype HUW234. The high yield in the selected lines was attributed to number of grains per ear, grain weight, tiller number, biomass and lower canopy temperature. The line giving higher yield under rainfed condition also had low stress sensitivity index suggesting its ability to tolerate water-stress. The high yielding lines may be used for testing in a variety development programme. The study is yet another example of the successful use of MAS in combination with phenotypic selection for development of high yielding wheat genotypes for rainfed and irrigated conditions.



中文翻译:

使用无背景选择标记辅助育种的干旱不敏感谷物产量QTL基因渗入改良四个印度面包小麦品种

在小麦中,将主要干旱产量QTL(Qyld.csdh.7AL)引入干旱下占谷物产量变化约20%的印度四个小麦品种(HUW234,HUW468,K307和DBW17)中,高产耐旱基因型。标记Xwmc273.3与产量相关的QTL用于标记辅助的前景选择,然后进行表型选择,从而开发了55个先进品系。在2015-2016年和2016-2017年两个作物季节(Meerut和Niphad)的灌溉和雨水条件下对这些品系进行了评估,这两个地区的农业气候条件有所不同。在Niphad的灌溉条件下,相对于用于基因渗入的相应基因型HUW234和DWB17,三株品系的产量提高了14.9-25.7%。同样,在密拉特(Meerut)的雨养条件下,一个品系的产量比相应的基因型HUW234高25.5%。所选品系的高产归因于每穗的谷物数量,谷物重量,分till数量,生物量和较低的冠层温度。在雨养条件下产量较高的品系也具有较低的胁迫敏感性指数,表明其耐水分胁迫的能力。高产品系可用于品种开发计划中的测试。这项研究是MAS与表型选择相结合成功开发用于雨育和灌溉条件的高产小麦基因型的又一个例子。

更新日期:2020-02-19
down
wechat
bug