Seed-to-seed early-season cold resiliency in sorghum.
Seed-to-seed early-season cold resiliency in sorghum.
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DOI：
10.1038/s41598-021-87450-1
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发表时间：
2021-04-08
影响因子：
4.6
通讯作者：
Burke J
中科院分区：
文献类型：
--
作者：
Emendack Y;Sanchez J;Hayes C;Nesbitt M;Laza H;Burke J
早期种植的高粱通常经历较冷的白天/夜晚温度，这可能导致生长延迟，开花和不育的花粉，限制了高海拔和温带地区的生产力。高粱耐冷性的遗传变异性已经通过表征次最适温度下的发芽、出苗、活力和幼苗生长来评估。然而，还没有评估早期寒冷对植物生长和发育的复合影响以及随后潜在谷物产量损失的变化。农业形态和生理反应的高粱下生长的早期，中期和标准种植日期在西德克萨斯州的特点是从种子到种子。使用一组具有两个主要耐受性来源的不同品系和杂交种，并且先前选择用于幼苗耐冷性。以苗期耐冷性强的标准商品杂交种和感冷育种系为对照，对这些品种进行了评价。在苗期，早期营养，成熟阶段的评估参数的变异性，观察种植日期的基因型和耐冷性的来源。穗分化延迟，穗尺寸减小，导致早、中播期籽粒产量下降。在早、中播期，穗宽和穗面积与最终发芽率是产量的唯一显著预测因子。不仅在耐冷和敏感对照之间观察到性能的显著变化，而且在耐冷来源之间也观察到显著变化，埃塞俄比亚高原来源的产量损失比中国同行的产量损失小。因此，筛选耐冷性不应仅限于早期幼苗表征，还应考虑可能影响产量损失的农艺性状，这取决于耐受性的来源。
Early planted sorghum usually experiences cooler day/night temperatures, which may result in delayed growth, floral initiation, and infertile pollen, limiting productivity in high altitudes and temperate regions. Genetic variability for cold tolerance in sorghum has been evaluated by characterizing germination, emergence, vigor, and seedling growth under sub-optimal temperatures. However, the compounded effect of early season cold on plant growth and development and subsequent variability in potential grain yield losses has not been evaluated. Agro-morphological and physiological responses of sorghum grown under early-, mid-, and standard planting dates in West Texas were characterized from seed-to-seed. A set of diverse lines and hybrids with two major sources of tolerance, and previously selected for seedling cold tolerance were used. These were evaluated with a standard commercial hybrid known for its seedling cold tolerance and some cold susceptible breeding lines as checks. Variabilities in assessed parameters at seedling, early vegetative, and maturity stages were observed across planting dates for genotypes and sources of cold tolerance. Panicle initiation was delayed, and panicle size reduced, resulting in decreased grain yields under early and mid-planting dates. Coupled with final germination percent, panicle width and area were significant unique predictors of yield under early and mid-planting dates. Significant variability in performance was observed not only between cold tolerant and susceptible checks, but noticeably between sources of cold tolerance, with the Ethiopian highland sources having lesser yield penalties than their Chinese counterparts. Thus, screening for cold tolerance should not be limited to early seedling characterization but should also consider agronomic traits that may affect yield penalties depending on the sources of tolerance.
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影响因子：
5.8
作者：
HAMMER, GL;CARBERRY, PS;MUCHOW, RC
通讯作者：
MUCHOW, RC
影响因子：
5.8
作者：
Chiluwal, Anuj;Bheemanahalli, Raju;Jagadish, S. V. Krishna
通讯作者：
Jagadish, S. V. Krishna
影响因子：
2.3
作者：
HAMMER, GL;VANDERLIP, RL;DALE, AB
通讯作者：
DALE, AB
影响因子：
1.2
作者：
Kapanigowda, Mohankumar H.;Perumal, Ramasamy;Little, Christopher R.
通讯作者：
Little, Christopher R.
影响因子：
2.3
作者：
Craufurd, PQ;Qi, AM;Mahalakshmi, V
通讯作者：
Mahalakshmi, V