Exploring traditional and novel spike traits associated with seed retention in perennial ryegrass by integrating 2D and 3D image analysis

IF 2 3区 农林科学 Q2 AGRONOMY Crop Science Pub Date : 2024-09-26 DOI:10.1002/csc2.21371
Travis B. Tubbs, Thomas G. Chastain
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Abstract

Seed shattering is a major economic problem in seed production of perennial ryegrass (Lolium perenne L.). The objective was to identify potential relationships between phenotypic traits and seed retention in a 2‐year field trial with 21 diverse global accessions of perennial ryegrass. Accessions were grouped according to level of seed retention. Phenotypic traits examined were growth habit, spike length, curvature of the spike, spikelets per spike, spikelet length, internode length between spikelets, angle of spikelet insertion into the rachis, seeds per spike, and seed weight. Traits were captured and measured by use of novel two‐dimensional (2D) and three‐dimensional (3D) imaging tools. Among accessions, median seed retention values for the high and low seed retention groups were 61% and 36%, respectively. Four traits were found to significantly impact seed shattering: spike length (p ≤ 0.01), seed weight (p ≤ 0.001), seeds per spike (p ≤ 0.05), and internode length between spikelets (p ≤ 0.01). Seed retention was highest in accessions with short spikes. Most of the accessions that had high seed retention also had lower mean seed weight than the commercial plant materials. Accession (PI 231620) had both high levels of seed retention and a mean seed weight that is acceptable in the marketplace. These qualities may be used to improve seed retention in the breeding of perennial ryegrass cultivars. The 2D and 3D imaging methods have applicability in measurement of other plant morphological traits and across a broad range of plant species.
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通过整合二维和三维图像分析,探索与多年生黑麦草留种相关的传统和新型穗状性状
种子破碎是多年生黑麦草(Lolium perenne L.)种子生产中的一个主要经济问题。本研究的目的是通过对全球 21 个不同的多年生黑麦草品种进行为期 2 年的田间试验,确定表型性状与留种率之间的潜在关系。根据留种率的高低对品种进行分组。考察的表型性状包括生长习性、穗长、穗的弯曲度、每穗小穗、小穗长度、小穗之间的节间长度、小穗插入轴的角度、每穗种子数和种子重量。通过使用新型二维(2D)和三维(3D)成像工具捕捉和测量性状。在各品种中,高留种率组和低留种率组的留种率中值分别为 61% 和 36%。有四个性状对种子破碎有显著影响:穗长(p ≤ 0.01)、种子重量(p ≤ 0.001)、每穗种子数(p ≤ 0.05)和小穗间节间长度(p ≤ 0.01)。短穗品种的留种率最高。大多数留种率高的品种的平均种子重量也低于商品植株材料。品种(PI 231620)既有较高的留种率,平均种子重量也能为市场所接受。在培育多年生黑麦草栽培品种时,可利用这些特性提高留种率。二维和三维成像方法可用于测量其他植物形态特征,并适用于多种植物物种。
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来源期刊
Crop Science
Crop Science 农林科学-农艺学
CiteScore
4.50
自引率
8.70%
发文量
197
审稿时长
3 months
期刊介绍: Articles in Crop Science are of interest to researchers, policy makers, educators, and practitioners. The scope of articles in Crop Science includes crop breeding and genetics; crop physiology and metabolism; crop ecology, production, and management; seed physiology, production, and technology; turfgrass science; forage and grazing land ecology and management; genomics, molecular genetics, and biotechnology; germplasm collections and their use; and biomedical, health beneficial, and nutritionally enhanced plants. Crop Science publishes thematic collections of articles across its scope and includes topical Review and Interpretation, and Perspectives articles.
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