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- Title
Quantitative trait loci associated with soybean tolerance to low phosphorus stress based on flower and pod abscission.
- Authors
Zhang, D.; Liu, C.; Cheng, H.; Kan, G.; Cui, S.; Meng, Q.; Gai, J.; Yu, D.
- Abstract
With 2 figures and 5 tables Low phosphorus (P) stress limits soybean production. A population of 152 recombinant inbred lines (RILs) derived from a cross between ‘Bogao’ (P sensitive variety) and ‘Nannong 94-156’ (P tolerant variety) and 248 markers were used to map quantitative trait loci (QTLs) for low-P tolerance. Two pot culture trials were conducted and low-P tolerance evaluated using flower and pod abscission rate under low P and normal P. Conditional QTLs and epistasis for tolerance to low P were also analysed. A conditional QTL (near Satt274) on linkage group D1b+W was identified which conferred low-P tolerance epistatic effects and coincided with previously discovered QTLs. An additive QTL, qFARLPG-07, for flower abscission rate under low P was detected with a LOD score of 7.79 and explained 32.3% of phenotypic variation. It was detected at the same interval of the corresponding QTL for other traits across years. This region coincided with two conditional QTLs ( cqFARLPG-07 and cqPARLPG-07), from the P-tolerant parent ‘Nannong 94-156’ related to low-P tolerance. These results will provide a basis for further fine mapping and eventual cloning of the P-efficiency genes in soybean.
- Subjects
ABSCISSION (Botany); FORAGE plants; GENETIC engineering; SOYBEAN; DEFOLIATION
- Publication
Plant Breeding, 2010, Vol 129, Issue 3, p243
- ISSN
0179-9541
- Publication type
Article
- DOI
10.1111/j.1439-0523.2009.01682.x