RELATIVE DROUGHT TOLERANCE OF PROMISING PEA BREEDING LINES
2024
Soboleva, G.V. | Zadorin, A.M. | Sobolev, A.N.
The article presents the results of evaluation of relative drought tolerance of promising breeding lines of pea heterophyllous morphotype chameleon. Seven promising lines of pea morphotype chameleon breeding of FSC LGC served as material for research: Yag-10-384, Yag-12- 37, Yag-16-41, Yag-16-96, Yag-16-107, Yag-16-721, Yag-16-721/1. Variety standards: Jaguar (heterophyllous chameleon form), Gambit (tendril morphotype), Tempe (common leaf morphotype). Evaluation of resistance at early stages of ontogenesis was carried out by germination of seeds in selective systems containing sucrose (10 atm.) as a stress factor. Control - water. The diagnostic criterion of stability was the germinal root length index (GRI) - the ratio of primary roots length under water deficit conditions to the control. To analyze the dehydration tolerance of whole plants, an indicator such as water-holding capacity determined by the wilting method was used. Genotypic differences among pea samples of tendril, leafy and heterophyll morphotypes were revealed for indicators characterising relative drought tolerance. The data obtained allowed differentiating genotypes into resistance groups. In general, the breeding lines Yag-16-41, Yag-16-96 and the variety Jaguar showed the highest relative drought tolerance among the material analysed (root length index and water-holding capacity of plants during wilting).
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