Performance of improved versions of Swarna introgressed with yield enhancing genes in multi-location trials

ORYZA- An International Journal on Rice Pub Date : 2023-03-30 DOI:10.35709/ory.2023.60.1.1

Kousik Mbvn, P. E, R. G, C. K, H. G, D. T, Hajira Sk, Swapnil Rk, L. B, Mastanbee Sk, A. M, A. M, Kaleysa Rr, P. Sinha, V. G., Fiyaz Ra, S. P, S. Lv, Prasad Ms, Laha Gs, Krishna Satya A, S. P, Neeraja Cn, Kim Sr, Jena Kk, Sundaram Rm

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Abstract

Swarna (MTU7029), an Indian mega-variety of rice, is cultivated on an estimated 8Mha of land. There is a pressing need to address yield stagnation and wider adaptability to irrigated lowland and rainfed ecologies as a result of the negative consequences of climate change and population growth. The present study was aimed at improving Swarna for two yield-related traits through marker-assisted backcross breeding strategy by introgression of OsSPL14 (panicle branching) and SCM2 (stronger culm). Foreground and background selection was carried out at each generation. Homozygous BC2F2 plants harbouring both yield-enhancing genes were identified and advanced through pedigree selection till BC2F5 and evaluated in station trials. Three promising lines possessing higher yield over recurrent parent were identified, and a single line, IET 27661 exhibited superior yield in multi-location trials of the All India Coordinated Rice Improvement Programme (AICRIP) and was found to be promising.

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添加增产基因的改良版Swarna在多位点试验中的表现

Swarna (MTU7029)是印度的一种巨型水稻品种，种植面积约为8Mha。由于气候变化和人口增长的负面影响，迫切需要解决产量停滞和对灌溉低地和雨养生态更广泛的适应性问题。本研究旨在通过标记辅助回交育种策略，通过OsSPL14(穗分枝)和SCM2(强秆)的渗入，提高Swarna的两个产量相关性状。在每一代进行前景和背景选择。通过家系选择，鉴定并推进了含有两个增产基因的BC2F2纯合子植株，直到BC2F5，并在站试验中进行了评价。在全印度协调水稻改良计划(AICRIP)的多地点试验中，IET 27661表现出更高的产量，并被认为是有希望的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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ORYZA- An International Journal on Rice

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