Genetic Diversity in Stomatal Density among Soybeans Elucidated Using High-throughput Technique Based on an Algorithm for Object Detection

被引:29
|
作者
Sakoda, Kazuma [1 ,2 ]
Watanabe, Tomoya [1 ]
Sukemura, Shun [1 ]
Kobayashi, Shunzo [1 ]
Nagasaki, Yuichi [1 ]
Tanaka, Yu [1 ,3 ]
Shiraiwa, Tatsuhiko [1 ]
机构
[1] Kyoto Univ, Grad Sch Agr, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan
[2] Japan Soc Promot Sci, Kyoto, Japan
[3] JST, PRESTO, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan
关键词
PHOTOSYNTHETIC RATE; CONDUCTANCE; YIELD; SIZE;
D O I
10.1038/s41598-019-44127-0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The stomatal density (SD) can be a promising target to improve the leaf photosynthesis in soybeans (Glycine max (L.) Merr). In a conventional SD evaluation, the counting process of the stomata during a manual operation can be time-consuming. We aimed to develop a high-throughput technique for evaluating the SD and elucidating the variation in the SD among various soybean accessions. The central leaflet of the first trifoliolate was sampled, and microscopic images of the leaflet replica were obtained among 90 soybean accessions. The Single Shot MultiBox Detector, an algorithm for an object detection based on deep learning, was introduced to develop an automatic detector of the stomata in the image. The developed detector successfully recognized the stomata in the microscopic image with high-throughput. Using this technique, the value of R-2 reached 0.90 when the manually and automatically measured SDs were compared in the 150 images. This technique discovered a variation in SD from 93 +/- 3 to 166 +/- 4mm(-2) among the 90 accessions. Our detector can be a powerful tool for a SD evaluation with a large-scale population in crop species, accelerating the identification of useful alleles related to the SD in future breeding programs.
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页数:9
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