فیزیولوژی محیطی گیاهی (Mar 2022)
Chlorophyll fluorescence parameters and selection of the best genotypes in rice (Oryza sativa L.), based on BLPSI and LPSI indices
Abstract
In order to selection of best individual caused Iranian traditional rice variety, Tarommahalli (as the female parent), and a mutant Tarommahalli, (as the male parent) crosses an experiment was conducted using 350 individulas of F2 generation. from which F1 and F2 generations were developed. Evaluation of the parents, F1 and F2 generations was carried out at the Gonbad Kavous University at 2017. 50 plants of both the F1 population and the parents and 350 individuals of the F2 population were grown in an experimental field with a spacing of 25 cm × 25 cm. Chlorophyll fluorescence properties Fo, F'o, Fm, F'm, F ', ETR, Fv, Fv / Fm, F'v / F'm, NPQ, qP, Y (II), qN, qL and weight of 100 grains, tiller number, filled grains number, unfilled grains number, plant height, panicle length, stem diameter, grain length, width and shape, straw weight, grain filling period, flag leaf length and width were recorded. The rate of electron transfer through photosystem II, flag leaf width, base fluoresce in dark-adapted conditions, the number of fertile tillers, maximum fluorescence in the dark-adapted conditions, number of primary branches, flag leaf area, flag leaf length, main panicle length and plant weight had the highest effect on grain yield, respectively. The highest response to selection belongs to 9th economic weight (heritability) in both BLPSI and LPSI indices. After, sixth coefficients (correlation) had the highest response to the selection. The results showed that the inheritance of Chlorophyll fluorescence parameters can be effectively used as an economic weight in the selection of the best individual. Genotypes 3, 6, 17, 24 and 30 were selected based on LPSI and genotypes 3 and 6 based on BLPSI as superior genotypes. The BLPSI and LPSI indices had high efficiency in this research and are recommended for improving the rice grain yield.
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