6/24/2023 0 Comments Macvector mutagenesisInfluence of light intensity and photoperiod on inflorescence initiation in tomatoes. Photoperiod and flowering in Tomato ( Lycopersicon esculentum Mill.). Tomato SP-interacting proteins define a conserved signaling system that regulates shoot architecture and flowering. The SELF-PRUNING gene of tomato regulates vegetative to reproductive switching of sympodial meristems and is the ortholog of CEN and TFL1. Phytochrome B regulates Heading date 1 ( Hd1)-mediated expression of rice florigen Hd3a and critical day length in rice. Phytochrome mediates the external light signal to repress FT orthologs in photoperiodic flowering of rice. The flowering time regulator CONSTANS is recruited to the FLOWERING LOCUS T promoter via a unique cis-element. ![]() Photoreceptor regulation of CONSTANS protein in photoperiodic flowering. CONSTANS mediates between the circadian clock and the control of flowering in Arabidopsis. FKF1 and GIGANTEA complex formation is required for day-length measurement in Arabidopsis. The role of recently derived FT paralogs in sunflower domestication. The TFL1 homologue KSN is a regulator of continuous flowering in rose and strawberry. Natural variation in a homolog of Antirrhinum CENTRORADIALIS contributed to spring growth habit and environmental adaptation in cultivated barley. Variations in Hd1 proteins, Hd3a promoters, and Ehd1 expression levels contribute to diversity of flowering time in cultivated rice. Takahashi, Y., Teshima, K.M., Yokoi, S., Innan, H. ![]() Natural variation of the RICE FLOWERING LOCUS T 1 contributes to flowering time divergence in rice. Naturally occurring allele diversity allows potato cultivation in northern latitudes. The pseudo-response regulator Ppd-H1 provides adaptation to photoperiod in barley. Turner, A., Beales, J., Faure, S., Dunford, R.P. ![]() Natural variation in Ghd7 is an important regulator of heading date and yield potential in rice. ![]() Molecular and geographic evolutionary support for the essential role of GIGANTEAa in soybean domestication of flowering time. Genetic variation in four maturity genes affects photoperiod insensitivity and PHYA-regulated post-flowering responses of soybean. The genetic basis of flowering responses to seasonal cues. Our findings suggest that pre-existing variation in SP5G facilitated the expansion of cultivated tomato beyond its origin near the equator in South America, and they provide a compelling demonstration of the power of gene editing to rapidly improve yield traits in crop breeding.Īndrés, F. CRISPR/Cas9-engineered mutations in SP5G cause rapid flowering and enhance the compact determinate growth habit of field tomatoes, resulting in a quick burst of flower production that translates to an early yield. SP5G expression is induced to high levels during long days in wild species, but not in cultivated tomato because of cis-regulatory variation. Here we show that loss of day-length-sensitive flowering in tomato was driven by the florigen paralog and flowering repressor SELF-PRUNING 5G ( SP5G). However, day-length sensitivity in crops limits their geographical range of cultivation, and thus modification of the photoperiod response was critical for their domestication 2, 3, 4, 5, 6, 7, 8, 9, 10, 11. Plants evolved so that their flowering is triggered by seasonal changes in day length 1.
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