Paternal leakage inheritance and a fitness cost are associated with the chloroplastic psbA gene controlled metribuzin tolerance in lentil (Lens culinaris)
| Autor: | Larn S. McMurray, Kirstin E. Bett, Simon Michelmore, Isabel Munoz-Santa, Albert Vandenberg, Dili Mao, Christopher Preston, Jeffrey G. Paull |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Non-Mendelian inheritance food.ingredient Brassica Introgression Plant Science Horticulture Gene mutation 01 natural sciences 03 medical and health sciences chemistry.chemical_compound food Anthesis Metribuzin Genetics Canola biology food and beverages biology.organism_classification 030104 developmental biology chemistry Trait Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Euphytica. 217 |
| ISSN: | 1573-5060 0014-2336 |
| DOI: | 10.1007/s10681-021-02841-9 |
| Popis: | Reciprocal F1, F2 and F3 populations of lentil (Lens culinaris Medik.) were developed by crossing between lines, with a chloroplastic psbA gene mutation conferring tolerance to the photosystem II inhibitor herbicide metribuzin, and sensitive parent PBA Flash, to understand the genetic control of the herbicide tolerance. Additionally, reciprocal BC1F2 populations were developed to identify any fitness penalty associated with the metribuzin tolerance. Phenotyping and genotyping results of the F1, F2, and F3 populations identified a predominantly maternal inheritance pattern, but with a level of paternal leakage. Paternal leakage occurred in approximately 20% of F1 phenotypes, when including lines showing heteroplasmy (the existence of maternal and paternal chloroplasts within an individual). Field experiments with BC1F2 and BC1F3 lines confirmed this biparental inheritance pattern. Grain yield was reduced by 20–40% in metribuzin tolerant backcrossed lines compared with sensitive lines. Net assimilation rate at the onset of anthesis and plant dry weight at mid anthesis and maturity were also reduced in the tolerant lines suggesting reduced photosynthetic efficiency associated with the metribuzin tolerance results in lower dry weight and grain yield in the tolerant lines. The mode of inheritance and associated yield penalty of the tolerance trait will complicate its introgression in lentil breeding programs. However, the high level of tolerance and unique weed control benefits of this trait suggest that this form of metribuzin tolerance in lentil, which is similar to triazine tolerant canola (Brassica napus L.), could be adopted. |
| Databáze: | OpenAIRE |
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