| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Dep. of Crop and Soil Environmental Sciences, Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061
National Key Lab. of Crop Genetic Improvement, Huazhong Agri. Univ., Wuhan, China
Rice Research and Extension Center, Univ. of Arkansas, P. O. Box 351, Stuttgart, AR 72160
* Corresponding author (smaroof{at}vt.edu).
Improving grain and milling yields of long-grain rice (Oryza sativa L.) continues to be a major objective of southern U.S. breeding programs. The objective of this study was to determine the relationship between molecular marker polymorphism of the parents and performance of the F1 hybrids. A diallei cross was made by intermating eight lines commonly used in U.S. southern long-grain rice breeding programs. The 28 F1 hybrids and the parents were evaluated for rough rice yield, head rice percentage, and head rice yield in replicated field trials. Very little heterosis was detected among hybrids for head rice percentage, whereas heterosis was high for rough rice yield and head rice yield. A survey for DNA polymorphisms with 82 RFLPs and 26 microsatellites revealed high levels of variation among the eight parents. A cluster analysis resolved these eight lines into indica (one line) and tropical japonica (seven lines) rice subgroups. A majority of the markers detected statistically significant effects on one or more traits by an analysis of variance. Marker F1 heterozygosity was highly correlated with rough rice yield (0.79**) and head rice yield (0.82**), and was also significantly correlated with heterosis of these two traits (0.47*, 0.58**, respectively). However, the correlations were largely attributed to the concurrence between high levels of heterozygosity and high performance in crosses between the indica variety Jasmine 85 and the remaining seven lines. Compared with the data published in previous studies, it was concluded that the level of correlations between marker distance and hybrid performance is dependent on the germplasm used.
Received for publication January 5, 1996.
This article has been cited by other articles:
|
|
 |
|
  S.-H. Cheng, J.-Y. Zhuang, Y.-Y. Fan, J.-H. Du, and L.-Y. Cao Progress in Research and Development on Hybrid Rice: A Super-domesticate in China Ann. Bot., October 1, 2007; 100(5): 959 - 966. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. A. Menz, R. R. Klein, N. C. Unruh, W. L. Rooney, P. E. Klein, and J. E. Mullet Genetic Diversity of Public Inbreds of Sorghum Determined by Mapped AFLP and SSR Markers Crop Sci., July 1, 2004; 44(4): 1236 - 1244. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Toorchi, H. E. Shashidhar, T. M. Gireesha, and S. Hittalmani Performance of Backcrosses Involving Transgressant Doubled Haploid Lines in Rice under Contrasting Moisture Regimes: Yield Components and Marker Heterozygosity Crop Sci., July 1, 2003; 43(4): 1448 - 1456. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
O. A. Gutierrez, S. Basu, S. Saha, J. N. Jenkins, D. B. Shoemaker, C. L. Cheatham, and J. C. McCarty Jr. Genetic Distance among Selected Cotton Genotypes and Its Relationship with F2 Performance Crop Sci., November 1, 2002; 42(6): 1841 - 1847. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. A. Gravois and J. L. Bernhardt Heritability and Genotype Environment Interactions for Discolored Rice Kernels Crop Sci., March 1, 2000; 40(2): 314 - 318. [Abstract] [Full Text]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Vadose Zone Journal | |||
| Journal of Natural Resources and Life Sciences Education |
Soil Science Society of America Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
