Morpho-Physiological Characterization of Winter Wheat “Buster” Population during the Vegetative Stage under Heat Stress

• 作者: Brett F. Carver
• 来源期刊: 美国植物学期刊(英文)
• 学科: 农学
• 关键词: Wheat BREEDING Buster Heat Stress MORPHOLOGICAL PHOTOSYNTHESIS PHYSIOLOGICAL
• 年，卷（期）: 2020,（8）
• 页码范围: 1276-1295
• 页数: 20页
• 分类号: S51

摘要

Phenotypic assessment of breeding population is important to identify robust lines for incorporating into future breeding programs. The objective of this study was to identify potential lines from a wheat (<i><span style="font-family:Verdana;">Triticum</span></i><span style="font-family:Verdana;"> <i>aestivum</i></span><span style="font-family:Verdana;"> L.) population, based on their morpho-physiological traits, for improved heat tolerance. A subset of 100 lines of the double haploid (DH) population named “Buster”, developed from two successful Oklahoma wheat varieties (Billings and Duster)</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> w</span><span style="font-family:Verdana;">as</span><span style="font-family:""><span style="font-family:Verdana;"> used in the study. Two experiments were conducted one in a greenhouse and the other in growth chambers. Data on plant height, tiller number, leaf number, and photosynthetic pigments were collected from the greenhouse;whereas the data on physiological parameters (leaf net photosynthesis (Pn), transpiration (T), stomatal conductance (g</span>_{<span style="font-family:Verdana;">s</span>}<span style="font-family:Verdana;">), intercellular carbon dioxide concentration (C</span>_{<span style="font-family:Verdana;">i</span>}<span style="font-family:Verdana;">), electron transport rate (ETR), Photosystem II efficiency (Fv</span></span><i><span style="font-family:Verdana;">'</span></i><span style="font-family:Verdana;">/Fm</span><i><span style="font-family:Verdana;">'</span></i><span style="font-family:""><span style="font-family:Verdana;">) and instantaneous water use efficiency (IWUE)) were collected from the growth chambers. Buster lines were significantly (</span><i><span style="font-family:Verdana;">P</span></i><span style="font-family:Verdana;"> < 0.05) different both morphologically and physiologically. A wide range of observations among genotypes for different morphological and physiological characteristics w