|Table of Contents|

CHARACTERIZATION OF VARIATION AND IDENTIFICATION OF ELITE ACCESSIONS OF ALUMINUM TOXIN TOLERANCE SOYBEAN GERMPLASM IN CHINA(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2007年06期
Page:
813-819
Research Field:
Publishing date:

Info

Title:
CHARACTERIZATION OF VARIATION AND IDENTIFICATION OF ELITE ACCESSIONS OF ALUMINUM TOXIN TOLERANCE SOYBEAN GERMPLASM IN CHINA
Author(s):
QI Bo; ZHAO Tuan-jie; GAI Jun-yi
Soybean Research Institute of Nanjing Agricultural University/National Center for Soybean Improvement/National Key Laboratory for Crop Genetics and Germplasm Enhancement，Nanjing 210095
Keywords:
Soybean [Glycine max(L.)Merr.]; Aluminum toxin tolerance; Germplasm; Evaluation; Variation
PACS:
S565.1
DOI:
10.3969/j.issn.1000-9841.2007.06.003
Abstract:
Aluminum toxicity is one of the major factors limiting crop productivity in acid soil，particularly in southern China. It is the base for aluminum toxin tolerance (Al-tolerance)breeding to characterize the genetic variability of the germplasm of cultivated soybean（Glycine max(L.)Merr.）from different varietal eco-regions. In this study，509 accessions of Glycine max(L.)Merr. sampled from different eco-regions were tested in a split-plot pot experiment with 28 mg kg-1aluminum vs. pure water as major treatment and accession as minor treatment and average membership index over plant height，number of leaves，dry weight above ground and dry weight under ground as tolerance indicator (FAi)in 2006. There showed a single peak frequency distribution of Fai value with the range of 8.59%-74.83% and the majority in the middle part and less frequencies at both sides，indicating a pretty large variation of Al-tolerance in the whole country，even scattered much more than the tolerant and sensitive checks.The same tendency was for the different eco-regions，with the variation among eco-regions (39.24%-41.65%)being less than that within eco-regions. Total 15 (accounted for 2.95%)most Al-tolerant accessions from Ecovregion Ⅰ，Ⅱ，Ⅲ，Ⅳ，and VI with FAi value more than 65% and five (0.98%)most sensitive accessions from Eco-region Ⅱ，Ⅲ，Ⅳ，and VI with FAi value less than 15% were screened out for further studies in genetics and breeding for Al-tolerance. Based on it，a new set of tolerant and sensitive standard checks were suggested to replace the old set used in the present study since the new one could cover a wider range of Al-tolerance. In addition，the potential utilization of the results in the study on genetics and breeding for Al-tolerance was discussed.

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