Bashary Neta, Miller Golan, Doitsch-Movshovits Tzion, Beery Avital, Ouyang Bo, Lieberman-Lazarovich Michal
Department of Vegetables and Field Crops Sciences, Institute of Plant Sciences, Agricultural Research Organization - Volcani Center, Rishon LeZion, Israel.
National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, China.
Front Plant Sci. 2024 Jul 1;15:1386824. doi: 10.3389/fpls.2024.1386824. eCollection 2024.
The occurring temperature increase in crop production areas worldwide is generating conditions of heat stress that negatively affect crop productivity. Tomato (), a major vegetable crop, is highly susceptible to elevated temperatures. Under such conditions, fruit set is dramatically reduced, leading to significant yield losses. , a wild species closely related to the cultivated tomato, was shown to have beneficial attributes under various abiotic stress growth conditions. We have utilized a new population of backcross inbred lines originated from a cross between and , in order to evaluate its potential as a new genetic resource for improvement of reproductive performance of cultivated tomato under heat stress conditions. This population was screened for various heat stress-related traits, under controlled heat stress and non-stress conditions. Our results show that significant variation exists for all the heat stress related traits that were examined and point at individual lines with better reproductive performance under heat stress conditions that share a common introgression from the wild parent, suggesting several candidate genes as potential drivers of thermotolerance. Thus, our results place this population as a valuable new resource for the discovery of heat stress related genetic loci for the future development of heat stress tolerant tomato cultivars.
全球农作物种植区出现的气温升高正在产生热应激条件，对作物生产力产生负面影响。番茄作为一种主要蔬菜作物，对温度升高高度敏感。在这种条件下，坐果率大幅降低，导致产量显著损失。野生种与栽培番茄密切相关，在各种非生物胁迫生长条件下具有有益特性。我们利用了一个由与杂交产生的新的回交自交系群体，以评估其作为一种新的遗传资源，在热应激条件下改善栽培番茄生殖性能的潜力。在受控的热应激和非应激条件下，对该群体进行了各种与热应激相关性状的筛选。我们的结果表明，所检测的所有与热应激相关的性状都存在显著变异，并指出在热应激条件下具有较好生殖性能的个体品系，它们共享来自野生亲本的共同渗入片段，这表明有几个候选基因可能是耐热性的潜在驱动因素。因此，我们的结果将这个群体定位为一个有价值的新资源，用于发现与热应激相关的遗传位点，以促进未来耐热番茄品种的开发。
