Genetic variation in root morphology and microsatellite DNA loci in upland rice (Oryza sativa L.) from Vietnam

被引：35
作者：
N.D. Thanh
N.D. Thanh
H.G. Zheng
N.V. Dong
L.N. Trinh
M.L. Ali
H.T. Nguyen
机构：
[1] University,Plant Molecular Genetics Laboratory, Department of Plant and Soil Science, Texas Tech
[2] Institute of Biotechnology,Plant Cell Genetics Laboratory
[3] Nghia Do,Plant Genebank Division
[4] Institute of Agricultural Science,undefined
来源：
Euphytica | 1999年 / 105卷 / 1期
关键词：
drought resistance; genetic diversity; microsatellite; root morphology; upland rice;
D O I：
10.1023/A:1003424329756
中图分类号：
学科分类号：
摘要：
Drought is a major constraint to the productivity of rice in upland ecosystems. The rice root system plays an important role in the regulation of water uptake and extraction from deep soil layers. The aim of this research was to study the variation in root morphology and the genetic diversity in upland rice accessions. Thirty-three upland rice accessions originated from Vietnam along with 13 selected upland rice lines from several other countries were used in this study. Variation in root morphology was observed in most of the investigated root traits such as maximum root length, total root dry weight, deep root to shoot ratio, and total root to shoot ratio. Most of the traits showed significant correlation and appeared interrelated. Genetic diversity among upland rice accessions was studied with microsatellite markers. Forty-one alleles were detected with 14 rice microsatellite primer pairs among all the rice accessions. Two dendrograms have been created based on 35 microsatellite alleles and 10 morphological traits data for 38 accessions and compared. These results provided useful information for the selection of suitable cross combinations for mapping quantitative trait loci (QTLs) related to drought resistance in upland rice.
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页码：53 / 62
页数：9
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