Impacts of Heat Stress around Flowering on Growth and Development Dynamic of Maize (Zea mays L.) Ear and Yield Formation.
Impacts of Heat Stress around Flowering on Growth and Development Dynamic of Maize (Zea mays L.) Ear and Yield Formation.
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开花期热应激对玉米穗生长发育动态及产量形成的影响
DOI：
10.3390/plants11243515
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发表时间：
2022-12-14
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影响因子：
--
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中科院分区：
文献类型：
--
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开花期高温胁迫对玉米生长发育和产量都有不利影响。穗部性状与产量密切相关，但开花前后热胁迫对不同耐热品种穗部发育及产量性状的影响尚不清楚。本研究在2020年和2021年进行了田间试验，包括（i）3个播期;（ii）3个温度制度：对照（CK）、吐丝前加热（V9-R1，TBS）和吐丝后加热（R1-R1 + 15 d，TAS）;（iii）2个杂交种（ZD 958：耐热; DH 605：热敏）。结果表明，加热处理对穗部性状和产量性状均产生负效应，但对穗长的影响不显著。（i）TAS的负效应大于TBS，（ii）DH 605的负效应大于ZD 958，（iii）单株粒数（KNP）的负效应大于粒重（KW）。穗部性状下降是由于穗部快速生长期间生长速度下降所致。小花授粉失败和籽粒败育是KNP下降的主要原因，主要取决于V15-R1 + 7 d的日最高气温。穗部性状与产量性状之间存在较强的线性相关关系，可作为今后耐热品种选育的重要指标。
Heat stress around flowering is harmful to maize growth and yield. Ear traits are closely related to yield; however, the effects of heat stress before and after flowering on ear development and yield traits remain unclear for different heat-tolerant cultivars. In this study, field experiments were conducted in 2020 and 2021, including (i) three sowing dates, (ii) three temperature regimes: control (CK), heated before silking (V9-R1, TBS) and heated after silking (R1-R1 + 15 d, TAS), and (iii) two hybrids (ZD958: heat-tolerant; DH605: heat-sensitive). The results showed that heating had negative effects on all surveyed ear and yield traits except for increased ear length under TBS. The negative effects were larger (i) for TAS than for TBS, (ii) for DH605 than for ZD958, and (iii) for kernel number per plant (KNP) than for kernel weight (KW). The decreased ear traits were a result of a decreased growth rate during rapid ear growth periods. Floret pollination failure and kernel abortion were the main reasons for the decrease in KNP, mainly depending on the daily maximum temperature during V15-R1 + 7 d. The strong linear relationships between ear and yield traits suggested that ear traits could be used as important indicators for breeding heat-resistant varieties in the future.
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影响因子：
2.3
作者：
Cicchino, M.;Edreira, J. I. Rattalino;Otegui, M. E.
通讯作者：
Otegui, M. E.
影响因子：
5.8
作者：
Lizaso, J. I.;Ruiz-Rarnos, M.;Rodriguez, A.
通讯作者：
Rodriguez, A.
影响因子：
3.5
作者：
Liu, Mayang;Sheng, Dechang;Huang, Shoubing
通讯作者：
Huang, Shoubing
影响因子：
0.7
作者：
Akram, M. A.;Wahid, A.;Deng, J. M.
通讯作者：
Deng, J. M.
影响因子：
5.8
作者：
Rattalino Edreira, J. I.;Budakli Carpici, E.;Otegui, M. E.
通讯作者：
Otegui, M. E.