Identifying variation for N-use efficiency and associated traits in amphidiploids derived from hybrids of bread wheat and the genera Aegilops, Secale, Thinopyrum and Triticum.
Identifying variation for N-use efficiency and associated traits in amphidiploids derived from hybrids of bread wheat and the genera Aegilops, Secale, Thinopyrum and Triticum.
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DOI：
10.1371/journal.pone.0266924
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发表时间：
2022
期刊：
影响因子：
3.7
通讯作者：
Foulkes, M. John
中科院分区：
文献类型：
--
作者：
Nehe, Ajit;King, Julie;King, Ian P.;Murchie, Erik H.;Foulkes, M. John
未来小麦籽粒产量的遗传进展将取决于生物量的增加，而这必须在不相应增加氮肥投入的情况下实现，以尽量减少对环境的影响。近几十年来，由于植物育种，小麦的遗传多样性已经丧失。然而，通过将野生小麦亲缘种的基因植入面包小麦中，可以创造新的遗传多样性。本研究的目的是研究面包小麦（Triticum aestivum L.）与相关品种Aegilops、Secale、Thinopyrum和Triticum杂交获得的双二倍体在高氮和低氮条件下比其面包小麦亲本具有更高的生物量、氮素利用效率（NUE）和叶片光合速率。对18个双二倍体系及其面包小麦亲本在高氮和低氮条件下进行了两年的温室试验。多年平均而言，与HN条件相比，LN条件下粮食产量降低38% （P = 0.004）。在高温条件下，3个双二倍体系的单株生物量均表现出正向海侵分离。在HN和LN条件下，旗叶在花前和花后的光合作用均存在正向海侵分离。在LN条件下，单株成熟期氮素吸收量呈正向海侵分离。研究结果表明，将野生近缘种性状向现代面包小麦种质中渗透，无论在最佳还是低氮有效度环境下，均可提高面包小麦生物量和氮素利用效率。
Future genetic progress in wheat grain yield will depend on increasing biomass and this must be achieved without commensurate increases in nitrogen (N) fertilizer inputs to minimize environmental impacts. In recent decades there has been a loss of genetic diversity in wheat through plant breeding. However, new genetic diversity can be created by incorporating genes into bread wheat from wild wheat relatives. Our objectives were to investigate amphidiploids derived from hybrids of bread wheat (Triticum aestivum L.) and related species from the genera Aegilops, Secale, Thinopyrum and Triticum for expression of higher biomass, N-use efficiency (NUE) and leaf photosynthesis rate compared to their bread wheat parents under high and low N conditions. Eighteen amphidiploid lines and their bread wheat parents were examined in high N (HN) and low N (LN) treatments under glasshouse conditions in two years. Averaged across years, grain yield reduced by 38% under LN compared to HN conditions (P = 0.004). Three amphidiploid lines showed positive transgressive segregation compared to their bread wheat parent for biomass per plant under HN conditions. Positive transgressive segregation was also identified for flag-leaf photosynthesis both pre-anthesis and post-anthesis under HN and LN conditions. For N uptake per plant at maturity positive transgressive segregation was identified for one amphidiploid line under LN conditions. Our results indicated that introgressing traits from wild relatives into modern bread wheat germplasm offers scope to raise biomass and N-use effciency in both optimal and low N availability environments.
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影响因子：
2.3
作者：
del Blanco, IA;Rajaram, S;Reynolds, MP
通讯作者：
Reynolds, MP
影响因子：
9.4
作者：
King, IP;Forster, BP;Miller, TE
通讯作者：
Miller, TE
影响因子：
7.4
作者：
JOHNSON, RC;MORNHINWEG, DW;HEITHOLT, JJ
通讯作者：
HEITHOLT, JJ
影响因子：
2
作者：
Flintham, JE;Borner, A;Gale, MD
通讯作者：
Gale, MD
DOI：
10.1080/14620316.1999.11511187
发表时间：
1999-11-01
影响因子：
1.9
作者：
Genard, M;Reich, M;Besset, J
通讯作者：
Besset, J