Premium
Genetic analysis of biomass and photosynthetic parameters in wheat grown in different light intensities
Author(s) -
Li Hongwei,
Wang Gui,
Zheng Qi,
Li Bin,
Jing Ruilian,
Li Zhensheng
Publication year - 2014
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.12174
Subject(s) - photosynthesis , quantitative trait locus , biology , doubled haploidy , biomass (ecology) , light intensity , photosystem ii , population , carotenoid , chlorophyll , photosynthetic efficiency , agronomy , botany , horticulture , genetics , gene , physics , optics , demography , sociology
Growth light intensities largely determine photosynthesis, biomass, and grain yield of cereal crops. To explore the genetic basis of light responses of biomass and photosynthetic parameters in wheat ( Triticum aestivum L.), a quantitative trait locus (QTL) analysis was carried out in a doubled haploid (DH) population grown in low light (LL), medium light (ML), and high light (HL), respectively. The results showed that the wheat seedlings grown in HL produced more biomass with lower total chlorophyll content (Chl), carotenoid content, and maximum photochemical efficiency of photosystem II ( Fv/Fm ) while the wheat seedlings grown in LL produced less biomass with higher Chl compared with those grown in ML. In total, 48 QTLs were identified to be associated with the investigated parameters in relation to growth light intensities. These QTLs were mapped to 15 chromosomes which individually explained 6.3%–36.0% of the phenotypic variance, of which chromosomes 3A, 1D, and 6B were specifically involved in LL response, 5D and 7A specifically involved in ML response, and 4B specifically involved in HL response. Several light‐responsive QTLs were co‐located with QTLs for photosynthetic parameters, biomass, and grain weight under various conditions which may provide new hints to uncover the genetic control of photosynthesis, biomass, and grain weight.