A study on creating highly yielded and drought-tolerant QTL gene-possessed lines of peanut

Abstract

In the trend of global climate changes and heavily occurring drought, particularly resulting in decreased productivity and cultivated areas of peanut production, the breeding and screening of highly yielded and drought-tolerant QTL gene-possessed peanut lines is considered a strategic and effective solution. In this study, the on-field assessment in combination with drought-tolerant gene screening was implemented and 6 peanut cultivars named TK10, Chum Nghe An, Sen Nghe An, L20, L23, and L14 were regarded as hybrid parents for the crossing-breeding program. Of 5 cross-breeding combinations (Chum Nghe An played the role of mother; 5 others were the fathers) 15 elite peanut lines of the F3 generation with high yield (over 29 quintals/ha) and 5 of them coded F3-6, F3-12 (Chum Nghe An × L23), F3-9, F3-10 (Chum Nghe An × Sen Nghe An), and F3-13 (Chum Nghe An × L14) possessed the locus for drought tolerance determined by electrophoresis technology. It is also particularly mentioned that all these lines had a good recovery (92.8-94.6, 84.4-88.4, and 80.0-83.4%, respectively), average productivity loss (30.56-34.10%), and good drought tolerance (point 3: G=21-40%).