NDLI: Pod Dehiscence in Soybean : Assessing Methods and Varietal Difference

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Pod Dehiscence in Soybean : Assessing Methods and Varietal Difference

Content Provider	Taylor & Francis Online
Author	Romkaew, Jutamas Umezaki, Teruhisa
Abstract	The varietal difference of pod dehiscence in 25 soybean cultivars consisting of 16 Japanese and 9 Thai cultivars was examined at 3, 5, 7, 14, 21, 28 and 35 days after placing in a desiccator (desiccator method) and 2, 4 and 7 hrs after placing in an oven at 60ºC (oven-dried method). The cultivars examined were divided into susceptible and resistant groups according to the degree of pod dehiscence. Most of the Japanese cultivars (excepting Suzuotome) and NS1 were susceptible while most of the Thai cultivars (excepting NS1) and Suzuotome were resistant to dehiscence. The degrees of pod dehiscence measured by the desiccator and oven-dried methods were nearly the same, and the moisture content of the pods not dehisced was always higher than that of the dehisced pod. The effect of ambient humidity on pod dehiscence was examined in five soybean cultivars SJ5, Shirotae, Tamahomare, CM60 and Fukuyutaka. When the pods were exposed to 15 or 25% relative humidity (RH), the pods of susceptible cultivars, Shirotae, Tamahomare and Fukuyutaka, started to dehisce at 24 hrs after the start of the treatment, but those of resistant cultivars, SJ5 and CM60, did not dehisce for 72 hrs. None of the cultivars dehisced under 50 and 60% RH. These results revealed that placing the pods in the desiccator for 14 days (desiccator method) or exposing the pods to 60ºC for 7 hrs in an oven (oven-dried method) were useful methods for checking the degree of dehiscence.
Starting Page	373
Ending Page	382
Page Count	10
File Format	PDF HTM / HTML
ISSN	1343943X 13491008
DOI	10.1626/pps.9.373
Journal	Plant Production Science
Volume Number	9
Issue Number	4
Language	English
Publisher	Taylor & Francis
Publisher Date	2015-12-03
Access Restriction	Open
Subject Keyword	Desiccator method Moisture content Oven-dried method Pod dehiscence Relative humidity Soybean Strain gauge method Varietal difference
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science

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