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Marker‐assisted introgression of QTLs for yield under moisture stress into elite varieties of rice (Oryza sativa)
Plant Breeding ( IF 2 ) Pub Date : 2020-09-21 , DOI: 10.1111/pbr.12865 Jeevula N. Bhukya 1, 2 , Swarajyalakshmi N. Bollineni 2 , Gopalakrishna Kadambari 1 , Reddiyamini Bommisetty 1 , Eswar R. Gudikati 1 , Withanawasam M. Darsha 1 , Keerthi Issa 2 , Srividhya Akkareddy 2 , Suresh N. Eslavath 2 , Ajay K. Dokuparthi 2 , Aparna Eragam 2 , Vinodkumar N. Moode 1 , Rameshbabu Pottepalem 1, 3 , Srilakshmi Chintala 3 , Eswarareddy P. Narrareddy 2 , Bahbhen Tanti 4 , Mandal P. Nimai 5 , Pallavi Muniraju 1 , Yeswanth V. Janaki 1 , Lakshminarayana R. Vemireddy 1, 2
Plant Breeding ( IF 2 ) Pub Date : 2020-09-21 , DOI: 10.1111/pbr.12865 Jeevula N. Bhukya 1, 2 , Swarajyalakshmi N. Bollineni 2 , Gopalakrishna Kadambari 1 , Reddiyamini Bommisetty 1 , Eswar R. Gudikati 1 , Withanawasam M. Darsha 1 , Keerthi Issa 2 , Srividhya Akkareddy 2 , Suresh N. Eslavath 2 , Ajay K. Dokuparthi 2 , Aparna Eragam 2 , Vinodkumar N. Moode 1 , Rameshbabu Pottepalem 1, 3 , Srilakshmi Chintala 3 , Eswarareddy P. Narrareddy 2 , Bahbhen Tanti 4 , Mandal P. Nimai 5 , Pallavi Muniraju 1 , Yeswanth V. Janaki 1 , Lakshminarayana R. Vemireddy 1, 2
Affiliation
Rice production is severely constrained by the moisture stress. The present study was undertaken to transfer two important QTLs viz., (qDTY2.2 and qDTY4.1), which controls yield under moisture stress (DTY) into two elite varieties, that is, MTU1010 and NLR34449 through marker‐assisted breeding. Foreground and background selections of backcross generations, that is, BC1F1, BC2F1 and BC2F2 identified several promising introgression lines (ILs) with two QTLs and single QTLs with an appreciable level of recovery of recipient parent genome. In ILs, the recovery of MTU1010 genome content was estimated to be 83%–93% while the recovery of NLR34449 was 84%–92%. The two‐QTL ILs of MTU1010 and NLR34449 backgrounds (qDTY2.2 and qDTY4.1) have shown substantial yield advantage (32 to 84%) over the single‐QTL ILs (either qDTY2.2 or qDTY4.1) under moisture stress conditions. Among all, two ILs, MBC‐124 and NBC‐127 are the best high yielding lines under moisture stress conditions. These outyielded ILs have the potential to be released as varieties in rainfed ecosystem and also can be used as donors in the existing breeding programme in rice.
中文翻译:
在水分胁迫下将标记的QTL渗入水稻优良品种(Oryza sativa)
水分胁迫严重限制了稻米的生产。本研究的目的在于将两个重要的QTL即,(qDTY2.2和qDTY4.1),其控制产生湿气应力(DTY)下为两个优良品种,即,MTU1010和NLR34449通过标记辅助的育种。回交世代的前景色和背景选择,即BC 1 F 1,BC 2 F 1和BC 2 F 2鉴定了几个具有两个QTL和单个QTL的有前途的基因渗入系(IL),其受体亲本基因组的恢复水平可观。在ILs中,MTU1010基因组含量的恢复率估计为83%–93%,而NLR34449的恢复率则为84%–92%。与单QTL IL(qDTY2.2或qDTY4.1)相比,MTU1010和NLR34449背景的两个QTL IL(qDTY2.2和qDTY4.1)显示出显着的产量优势(32%至84%))在潮湿的条件下。其中,在水分胁迫条件下,两个ILs MBC-124和NBC-127是最好的高产系。这些高产的白介素有可能在雨育生态系统中作为变种释放,也可以用作现有水稻育种计划的供体。
更新日期:2020-09-21
中文翻译:
在水分胁迫下将标记的QTL渗入水稻优良品种(Oryza sativa)
水分胁迫严重限制了稻米的生产。本研究的目的在于将两个重要的QTL即,(qDTY2.2和qDTY4.1),其控制产生湿气应力(DTY)下为两个优良品种,即,MTU1010和NLR34449通过标记辅助的育种。回交世代的前景色和背景选择,即BC 1 F 1,BC 2 F 1和BC 2 F 2鉴定了几个具有两个QTL和单个QTL的有前途的基因渗入系(IL),其受体亲本基因组的恢复水平可观。在ILs中,MTU1010基因组含量的恢复率估计为83%–93%,而NLR34449的恢复率则为84%–92%。与单QTL IL(qDTY2.2或qDTY4.1)相比,MTU1010和NLR34449背景的两个QTL IL(qDTY2.2和qDTY4.1)显示出显着的产量优势(32%至84%))在潮湿的条件下。其中,在水分胁迫条件下,两个ILs MBC-124和NBC-127是最好的高产系。这些高产的白介素有可能在雨育生态系统中作为变种释放,也可以用作现有水稻育种计划的供体。