Confirmation of the pleiotropic control of leaflet shape and number of seeds per pod by the Ln gene in induced soybean mutants

Breeding Science
Takashi SayamaMasao Ishimoto

Abstract

Most soybean cultivars possess broad leaflets; however, a recessive allele on the Ln locus is known to cause the alteration of broad to narrow leaflets. The recessive allele ln has also been considered to increase the number of seeds per pod (NSP) and has the potential to improve yield. Recently, Gm-JAG1 (Glyma20g25000), a gene controlling Ln, has been shown to complement leaf shape and silique length in Arabidopsis mutants. However, whether Gm-JAG1 is responsible for those traits in soybean is not yet known. In this study, we investigated the pleiotropic effect of soybean Ln gene on leaflet shape and NSP by using two independent soybean Gm-jag1 mutants and four ln near isogenic lines (NILs). The leaflet shape was evaluated using a leaf image analysis software, SmartLeaf, which was customized from SmartGrain. The leaflets of both the Gm-jag1 mutants were longer and narrower than those of the wild-type plants. Interestingly, the image analysis results clarified that the perimeter of the mutant leaflets did not change, although their leaflet area decreased. Furthermore, one mutant line with narrow leaflets showed significantly higher NSP than that in the wild (or Ln) genotype, indicating that soybean Ln gene pleiotropically contr...Continue Reading

References

Jan 28, 2003·The Journal of Heredity·R D DinkinsL H Edwards
Aug 13, 2005·The International Journal of Developmental Biology·Hirokazu Tsukaya
Jan 26, 2008·BMC Plant Biology·Jennifer L CooperSteven Henikoff
May 21, 2009·The Plant Journal : for Cell and Molecular Biology·Han XiaoLihuang Zhu
Oct 13, 2009·The Plant Cell·Rakefet David-SchwartzNeelima R Sinha
Jan 16, 2010·Nature·Jeremy SchmutzScott A Jackson
May 24, 2012·Proceedings of the National Academy of Sciences of the United States of America·Zhengjun XiaKyuya Harada
Dec 18, 2012·The Plant Cell·Namhee JeongSoon-Chun Jeong

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Datasets Mentioned

BETA
LC203763
LC203764

Software Mentioned

SmartGrain
R
SmartLeaf

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