以红色叶鞘为形态标记估算薏米花粉传播距离

IF 2 4区 农林科学 Q2 AGRONOMY Breeding Science Pub Date : 2023-09-01 Epub Date: 2023-09-09 DOI:10.1270/jsbbs.23016
Katsuhiro Matsui, Takayuki Tamura, Keito Nishizawa, Akiko Ohara-Takada
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引用次数: 0

摘要

薏米(Coix lacryma-jobi L.)在亚洲国家广泛种植,是一种可以用自己的花粉和雌蕊受精的作物。薏米不仅可以食用,还可以药用。许多栽培品种的谷粒含有糯性胚乳;在日本,只有含有这种糯性胚乳的谷粒才适合用作药物。许多野生类型的胚乳是非糯性的,在自然环境条件下很容易与栽培品种杂交。由于非糯性胚乳的性状对糯性胚乳的性状是显性的,因此栽培品种和野生型杂交产生的 F1 种子都是非糯性胚乳。为了减少不必要的杂交,我们使用红色叶鞘作为形态标记来研究花粉的传播距离。当栽培植物的行距为 70 厘米时,杂交率约为 25%-35%。随着距离的增加,杂交率下降的速度在没有间作植株的田块中可以用幂近似法拟合,而在有间作植株的田块中则可以用指数方程拟合。我们的数据可作为种植栽培品种时防止与野生型杂交的指导原则。
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Estimation of pollen dispersal distance in Job's tears (Coix lacryma-jobi L.) by using red leaf sheath as a morphological marker.

Job's tears (Coix lacryma-jobi L.) is grown widely in Asian countries and a crop that can fertilize with own pollen and pistils. The grains are used not only for food but also for medicinal purposes. The grain of many cultivars contains glutinous endosperm; only grains with this glutinous endosperm are suitable for use as medicine in Japan. Many wild types have non-glutinous endosperm and can easily cross with cultivar under natural environmental conditions. Because the non-glutinous endosperm trait is dominant to that of glutinous endosperm, F1 seeds produced by crosses between a cultivar and a wild type have non-glutinous endosperm. To reduce the rate of unwanted crosses, we investigated the pollen dispersal distance by using a red leaf sheath as a morphological marker. When plants were cultivated in rows 70 cm apart, the crossing rate was about 25%-35%. As the distance increased, the crossing rate decreased at a rate that could be fitted to a power approximation in fields without intervening plants and to an exponential equation in fields with intervening plants. Our data could be used as guidelines for preventing unwanted crossing with wild types when growing cultivars.

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来源期刊
Breeding Science
Breeding Science 农林科学-农艺学
CiteScore
4.90
自引率
4.20%
发文量
37
审稿时长
1.5 months
期刊介绍: Breeding Science is published by the Japanese Society of Breeding. Breeding Science publishes research papers, notes and reviews related to breeding. Research Papers are standard original articles. Notes report new cultivars, breeding lines, germplasms, genetic stocks, mapping populations, database, software, and techniques significant and useful for breeding. Reviews summarize recent and historical events related breeding. Manuscripts should be submitted by corresponding author. Corresponding author must have obtained permission from all authors prior to submission. Correspondence, proofs, and charges of excess page and color figures should be handled by the corresponding author.
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