Field Crop 2025, Vol.8, No.1, 41-50 http://cropscipublisher.com/index.php/fc 45 Figure 2 The numbers of differentially expressed lncRNAs and mRNAs in two genotypes (Q2 and Qinyou 8) in response to drought stress and re-watering treatments (Adopted from Tan et al., 2020) 5.3 Key findings and implications for breeding When it comes to rapeseed drought resistance, recent studies have found some interesting things. Take genes such as LEA3 and VOC, for example. They are particularly active during droughts-this is no small matter. Experiments have shown that overexpressing these genes not only improves drought resistance, but also unexpectedly improves seed size and oil content (Liang et al., 2019). On the other hand, if the expression of these genes decreases, both oil content and drought resistance will suffer (Figure 3). Interestingly, those inconspicuous lncRNAs are also working secretly. They work in partnership with some key genes, especially those related to plant hormone signals and stress resistance. Although the specific operation remains to be studied, these findings do remind breeders: if you want to cultivate rapeseed varieties that are both drought-resistant and high-yielding, it is not enough to just focus on conventional genes, but these regulatory factors must also be taken into account.
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