Naslov
Quantitative genetic analysis of chlorophyll a fluorescence parameters in maize in the field environments

Autori
Šimić, Domagoj ; Lepeduš, Hrvoje ; Jurković, Vlatka ; Antunović, Jasenka ; Cesar, Vera

Izvornik
Journal of integrative plant biology (1672-9072) 56 (2014), 7; 695-708

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
chlorophyll a fluorescence parameters; field conditions; IBM recombinant inbred lines; JIP-test; maize (Zea mays L.); quantitative trait loci (QTL)

Sažetak
Chlorophyll fluorescence transient from initial to maximum fluorescence (“P” step) throughout two intermediate steps (“J” and “I”) (JIP-test) is considered as reliable early quantitative indicator of stress in plants. The JIP-test is particularly useful for crop plants when applied in variable field environments. The aim of the present study was to conduct a quantitative trait loci (QTL) analysis for nine JIP-test parameters in maize during flowering in four field environments differing in weather conditions. QTL analysis and identification of putative candidate genes might help to explain the genetic relationship between photosynthesis and different field scenarios in maize plants. The JIP-test parameters were analyzed in the intermated B73 ×  Mo17 (IBM) maize population of 205 recombinant inbred lines. A set of 2178 molecular markers across the whole maize genome was used for QTL analysis revealing 10 significant QTLs for seven JIP-test parameters, of which five were co- localized when combined over the four environments indicating polygenic inheritance and pleiotropy. Our results demonstrate that QTL analysis of chlorophyll fluorescence parameters was capable of detecting one pleiotropic locus on the chromosome 7, coinciding with the gene gst23 that may be associated with efficient photosynthesis under different field scenarios.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Poljoprivreda (agronomija)

POVEZANOST RADA