Towards estimating shade response of bermudagrass(Cynodon spp.)using field-based photosynthetic properties
作者机构：Department of Crop and Soil SciencesUniversity of Georgia2360 Rainwater Rd.TiftonGA 31794USA Department of Crop and Soil SciencesUniversity of Georgia1109 Experiment St.GriffinGA 30223USA Department of HorticultureUniversity of Georgia1111 Plant Science BuildingAthensGA 30602USA
出 版 物：《Grass Research》 (草学研究（英文）)
年 卷 期：2022年第2卷第1期
页 面：20-25,I0001-I0004页
学科分类：08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：funded in part by the University of Georgia College of Agriculture&Environmental Sciences and by the National Institute of Food and Agriculture U.S.Department of Agriculture under award number 2010-51181-21064
主 题：breeding field estimating
摘 要：Shade tolerance is a highly desirable trait when breeding new bermudagrass(Cynodon spp.)lines,but current screening methods can take many years to *** is a clear need for large-scale turfgrass breeding programs to reliably,accurately,and quickly predict shade tolerance in their *** objectives of this research were to:(i)build custom chambers to reproducibly estimate photosynthetic characteristics from turfgrass canopies at different light intensities and(ii)determine which photosynthetic characteristics are indicative of past shade performance.A custom-built chamber was constructed to determine average photosynthetic characteristics for the whole plant by studying the turfgrass canopy at natural leaf angles for light *** tolerant(11-T-56)and shade sensitive(Tifway)bermudagrass cultivars were used to examine the effectiveness of the chamber within an array of photosynthetic characteristics when the grasses were grown in full-sun and 73%shade *** compensation point,chlorophyll content,quantum yield,dark respiration rate,and maximum quantum yield of photosystem II were evaluated in this *** on the results of this study,the authors recommend that light compensation point or maximum quantum yield be further evaluated as an accurate indicator of shade tolerance when performed in the field on spring days with grasses grown in full sun or 73%shade *** Rd rates and ambient temperatures on spring days appear to minimize unexplained variance in the data,which would allow researchers to better detect genotypic differences during this season.
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