Naslov
GWAS FOR BIOMASS RESPONSES TO WATER WITHHOLDING IN GBS GENOTYPED, FREELY AVAILABLE ACCESSIONS OF MAIZE

Autori
Galić, Vlatko ; Mazur, Maja ; Brkić, Andrija ; Brkić, Josip ; Jambrović, Antun ; Ledenčan, Tatjana ; Šimić, Domagoj

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
BOOK OF ABSTRACTS Abstracts of the 6th CONGRESS OF THE SERBIAN GENETIC SOCIETY / Vasiljević, Branka ; Patenković, Aleksandra ; Nikolić, Nađa - Beograd : Serbian Genetic Society, 2019, 11-11

ISBN
978-86-87109-15-5

Skup
6th Congress of the Serbian Genetic Society

Mjesto i datum
Vrnjačka Banja, Srbija, 13.10.2019. - 17.10.2019

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Recenziran

Ključne riječi
PLANT VARIETY PROTECTION ACT ; MAIZE ; ASSOCIATION MAPPING ; WATER WITHHOLDING

Sažetak
Patterns of seasonal variations in rainfall are changing which affects rain-fed agricultural areas. Water deficit during the early vegetative stages of growth represents a threat as it causes variability in plant development, makes plant susceptible to other stresses and deteriorates the stands. For example, in Osijek, Croatia, located within European Corn Belt, hydrological drought or at least 10-day streak with no rainfall occurred in April when the planting is carried out every of last four consecutive years. Plant’s responses to water deficit are reflected in biomass traits which represent the morpho-physiological adjustments of plant to new conditions. The aims of this study were to assess the biomass responses of maize inbred lines with expired plant variety protection (PVP), freely distributed worldwide using the genomewide analysis approach. The 109 maize inbred lines, genotyped by sequencing (GBS), was planted in growth chamber (16/8 day/night, 25°C, 50% RH, 200 μMol/m2/s) in trays with soil in three replicates. Plants in control (C) were watered every two days with, while watering was stopped for 10 days in water withholding (WW) treatment. Fourteen days old plants were harvested and fresh weight (FW), dry weight (DW) and dry matter content (DMC) were measured. Different responses to WW were detected in two genetic subgroups: Stiff Stalk and Non-Stiff Stalk. Large number of QTLs was detected on chromosomes 1, 2, 3, 6, 7 and 9, three of which crossed the Bonferroni threshold and it was shown that genetic regulation of DMC is different than regulation of FW and DW. This was further supported by correlations of rrBLUP marker effects between the traits. Measurements of biomass traits represent fast and reliable indicator of plant’s response to water withholding and can be used to effectively screen breeding progenies. Integration of the obtained genetic mapping results into the crop growth models along with other physiological variables will be discussed.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Poljoprivreda (agronomija)

POVEZANOST RADA