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Characteristics and Breeding Potential of Northeast China Soybean Germplasm Population in Changchun Area(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2017年02期
Page:
165-174
Research Field:
Publishing date:

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Title:
Characteristics and Breeding Potential of Northeast China Soybean Germplasm Population in Changchun Area
Author(s):
CHENG Yanxi1;  SUN Xiaohuan2;  ZHENG Chaochun1
1Changchun Academy of Agricultural Sciences, Changchun 130111, China;?
2Mudanjiang Branch of Heilongjiang Academy of Agricultural Sciences/Mudanjiang Experiment Station of the National Center for Soybean Improvement, Mudanjiang 157041, China;

Keywords:
Northeast spring sowing soybean;  Maturity group;  Agronomic and seed quality traits;  Genetic variation;  Breeding potential;  Ancestor
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2017.02.0165
Abstract:
Northeast China is a major ecoregion for soybean production in China, and of which, Changchun region is a major area A soybean germplasm population composed of 361 landraces and released cultivars collected in Northeast China was tested in Changchun in 2012-2014 for evaluation of its characterization and genetic potential in local breeding programs The following results were obtained: 1) The average performances with ranges of agronomic and seed quality traits were characterized as that whole growth period was 114 d (9388-13775 d), protein content/oil content/total protein and oil/100seed weight were 4109% (3668%-4585%), 2194% (1900%-2394%), 6309% (5949%-6624%)and 2053 g (947-282 g), plant height, nodes on main stem, number of branches and lodging score were 8382 cm (458-11468 cm), 167nodes (103-253), (01-101) and 26(14-40), respectively 2) Group MG0/MG I especially MG I was the best adapted maturity period groups that could fully utilize the local frostfree period for which the days to maturity was 120 d Groups MG000, MG00 matured in about 98-104 d, could not fully utilize the local frostfree period; while their plant height and nodes on main stem were about 20-28 cm and 3-4 nodes less than those of MG0/MGI, respectively Group MGII /MGIII did not mature naturally, plant heights and nodes on main stem were about 20-35 cm and 2-3 nodes more than those of MG0/ MG I Seed quality traits (protein content, oil content and protein+oil content)of all groups were similar, while each group has elite cultivars in seed quality traits 3)There were certain breeding potentials for all the agronomic and seed quality traits, the heritiability values were higher while the relative genetic progresses were lower for oil content and protein content, suggesting these traits need more genetic improvement; the improvement of protein+oil content should be based on the improvement of the respective two traits; however, in this local population, there was little potential in the lodging score improvement, except for some new germplasm introduced from other areas 4) The 82 local varieties could be traced to the 99 ancestors (the total number of varieties in Changchun area was 88, but no pedigree record could be traced for six released cultivars) in an average of 93 ancestors per variety The 99 ancestors are mainly from the local area with some from Heilongjiang and abroad The genetic contribution rate of the 20 ancestors out of the 99 ones from which most of the varieties derived accounted for 63% of the total germplasm of the 82 local varieties The top ancestors were Jinyuan (58 varieties derived from it with total contribution rate to the 82 varieties of 635%), Tiejiasilihuang (50, 816%), Shishengchangye (49, 66%), Duludou (44, 402%) and Silihuang (P340) (41,636%) The genetic background of the local varieties was relatively narrow and was to be expanded through introduction of germplasm from outside areas

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Last Update: 2017-05-14