Effect of ppd-a1 and ppd-b1 allelic variants on grain number and thousand kernel weight of durum wheat and their impact on final grain yield

dc.creatorArjona, J.M.
dc.creatorRoyo, C.
dc.creatorDreisigacker, S.
dc.creatorAmmar, K.
dc.creatorVillegas, D.
dc.date2018-07-18T21:11:41Z
dc.date2018-07-18T21:11:41Z
dc.date2018
dc.date.accessioned2023-07-17T20:02:49Z
dc.date.available2023-07-17T20:02:49Z
dc.identifierhttps://hdl.handle.net/10883/19548
dc.identifier10.3389/fpls.2018.00888
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7511436
dc.descriptionThe main yield components in durum wheat are grain number per unit area (GN) and thousand kernel weight (TKW), both of which are affected by environmental conditions. The most critical developmental stage for their determination is flowering time, which partly depends on photoperiod sensitivity genes at Ppd-1 loci. Fifteen field experiments, involving 23 spring durum wheat genotypes containing all known allelic variants at the PHOTOPERIOD RESPONSE LOCUS (Ppd-A1 and Ppd-B1) were carried out at three sites at latitudes ranging from 41° to 27° N (Spain, Mexico-north, and Mexico-south, the latter in spring planting). Allele GS100 at Ppd-A1, which causes photoperiod insensitivity and results in early-flowering genotypes, tended to increase TKW and yield, albeit not substantially. Allele Ppd-B1a, also causing photoperiod insensitivity, did not affect flowering time or grain yield. Genotypes carrying the Ppd-B1b allele conferring photoperiod sensitivity had consistently higher GN, which did not translate into higher yield due to under-compensation in TKW. This increased GN was due to a greater number of grains spike?1 as a result of a higher number of spikelets spike?1. Daylength from double ridge to terminal spikelet stage was strongly and positively associated with the number of spikelets spike?1 in Spain. This association was not found in the Mexico sites, thereby indicating that Ppd-B1b had an intrinsic effect on spikelets spike?1 independently of environmental cues. Our results suggest that, in environments where yield is limited by the incapacity to produce a high GN, selecting for Ppd-B1b may be advisable.
dc.formatPDF
dc.languageEnglish
dc.publisherFrontiers
dc.relationhttps://figshare.com/articles/Image_1_Effect_of_Ppd-A1_and_Ppd-B1_Allelic_Variants_on_Grain_Number_and_Thousand_Kernel_Weight_of_Durum_Wheat_and_Their_Impact_on_Final_Grain_Yield_TIFF/6721763
dc.relationhttps://figshare.com/articles/Table_1_Effect_of_Ppd-A1_and_Ppd-B1_Allelic_Variants_on_Grain_Number_and_Thousand_Kernel_Weight_of_Durum_Wheat_and_Their_Impact_on_Final_Grain_Yield_DOCX/6721769
dc.relationhttps://figshare.com/articles/Table_2_Effect_of_Ppd-A1_and_Ppd-B1_Allelic_Variants_on_Grain_Number_and_Thousand_Kernel_Weight_of_Durum_Wheat_and_Their_Impact_on_Final_Grain_Yield_DOCX/6721772
dc.relationhttps://figshare.com/articles/Table_3_Effect_of_Ppd-A1_and_Ppd-B1_Allelic_Variants_on_Grain_Number_and_Thousand_Kernel_Weight_of_Durum_Wheat_and_Their_Impact_on_Final_Grain_Yield_DOCX/6721775
dc.relationhttps://figshare.com/articles/Table_4_Effect_of_Ppd-A1_and_Ppd-B1_Allelic_Variants_on_Grain_Number_and_Thousand_Kernel_Weight_of_Durum_Wheat_and_Their_Impact_on_Final_Grain_Yield_DOCX/6721778
dc.relationhttps://figshare.com/articles/Table_5_Effect_of_Ppd-A1_and_Ppd-B1_Allelic_Variants_on_Grain_Number_and_Thousand_Kernel_Weight_of_Durum_Wheat_and_Their_Impact_on_Final_Grain_Yield_DOCX/6721781
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
dc.rightsOpen Access
dc.source888
dc.source9
dc.sourceFrontiers in Plant Science
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectPhotoperiod Sensitivity
dc.subjectDouble Ridge
dc.subjectTerminal Spikelet
dc.subjectPHENOLOGY
dc.subjectTRITICUM TURGIDUM
dc.subjectPHOTOPERIODICITY
dc.subjectSPIKELETS
dc.subjectYIELD COMPONENTS
dc.titleEffect of ppd-a1 and ppd-b1 allelic variants on grain number and thousand kernel weight of durum wheat and their impact on final grain yield
dc.typeArticle
dc.coverageSPAIN
dc.coverageMEXICO-NORTH
dc.coverageMEXICO-SOUTH
dc.coverageSwitzerland


Este ítem pertenece a la siguiente institución