The developmental genetics of plant height was analyzed from two groups of three-line indica hybrid rice at two environmental conditions based on the NCII design, using the additive-dominant developmental genetics models and the statistic methods. The results showed that the rice genotypes and environmental conditions could both affect plant height, and the effects of environment on plant height decreased gradually with plant development. Additive and dominant effects both governed the performance of plant height at all developmental stages. However, the degrees of effect varied among the rice genotypes. Moreover, the interaction between environments and genotypes also affected plant height. The genetic effects differed at most developmental stages. Furthermore, the expression of additive effect was more active than that of dominant effect. Conditional interaction effects with environment also influenced plant height during genetic development, especially at the early stage. Mid-parent heterosis (HMP) increased gradually with the developmental stage of plant height, and maximized at the latest stage, whereas the heterosis over the better parent (HBP) showed small differences among the genotypes, and kept stable at the later stage, with positive numeric value. At most developmental stages, conditional HMP was positively significant, while conditional HBP was negatively significant. All above results suggest that HMP and HBP have some new expressions in all developmental periods and the levels and directions are quite different.
1 Gao F M, Jiang Y, Kong D W, Li S G. Genetic control of plant height and its utilization in rice. Mol Plant Breeding, 2005, 3(1): 87–93.
2 Atchley W R, Zhu J. Developmental quantitative genetic, conditional epigenetic variability and growth in rice. Genetics, 1997, 147: 765–776.
3 Atchley W R, Xu S, Vogl C. Developmental quantitative genetic models of evolutionary change. Dev Genet, 1994, 15: 92–103.
4 Atchley W R. Ontogeny, timing of development, and genetic variance-covariance structure. Am Nat, 1984, 123: 519–540.
5 Cowley D E, Atchley W R. Quantitative genetic models for development, epigenetic selection and phenotypic evolution. Evolution, 1992, 46: 494–518.
6 Chen B Q, Chen Q, Wu J X. Study on boll size at different blooming stages and boll-setting sites in upland cotton (Gossypium hirsutum L.). Acta Gossypii Sin, 1998, 10(4): 199–204. (in Chinese with English abstract)
7 Chen Q, Zhu J, Wu J X. Genetic study on seed cotton yield at different boll-setting stages and fruiting sites in upland cotton. Sci Agric Sin, 2000, 33(4): 97–99. (in Chinese with English abstract)
8 Luo X H, Lu Z Z, Liu P Y, Wu J X, Zhu J. Genetic analysis of seed density and kernel percentage at different developmental stages in upland cotton (Gossypium hirsutum L.). Acta Agric Zhejiang, 1998, 10(5): 225–229. (in Chinese with English abstract)
9 Liang K J, Lin W X, Chen Z X, Li Y J, Liang Y Y, Guo Y C, He H Q, Chen F Y. Heterosis and genetic correlation analysis of rice (Oryza sativa L.) grain weight development under different environmental conditions. Chinese J Appl Ecol, 2003, 14(12): 2200–2204. (in Chinese with English abstract)
10 Shi C H, Wu J G, Fan L J, Zhu J, Wu P. Developmental genetic analysis for transparency of rice (Oryza sativa L.) at different environments. Acta Genet Sin, 2002, 29(1): 56–61. (in Chinese with English abstract)
11 Shi C H, Wu J G, Lou X B, Zhu J, Wu P. Genetic analysis of transparency and chalkiness area at different filling stages of rice (Oryza sativa L.). Field Crops Res, 2002, 76(1): 1–9.
12 Shi C H，Wu J G，Zhang X M, Wu P. Development analysis on genetic behavior of brown rice recovery in indica rice across environments. Plant Sci, 2002, 163(3): 555–561.
13 Chen Y Y, Qi J M, Lin L H, Liang K J, Zhou R Y, Wu J M. Kinetic developmental genetics analysis of Hibiscus cannabinus plant height and stem diameter. Chinese J Appl Ecol, 2005, 16(6): 1011–1016. (in Chinese with English abstract)
14 Lu X P, Xiao B G. Developmental genetic analysis for plant height in the flue-cured tobacco. Acta Tabac Sin, 2006, 12(4): 31–34. (in Chinese with English abstract)
15 Li W X, Ning H L, Li W B, Lu W H. Developmental genetic analysis of seed size in soybean (Glycine max). Genetics, 2006, 33(8): 746–756.
16 Zhu J. Analysis Methods for Genetic Models. Beijing: Chinese Agricultural Press, 1997: 241–255. (in Chinese)
17 Zhu J. Analysis of conditional genetic effects and variance components in developmental genetics. Genetics, 1995, 141(4): 1633–1639.
18 Zhang L H, Wang J J, Li X C, Wang L Y. Analysis on combining ability of main agronomic characters in three-line hybrid rice. Acta Agric Zhejiang, 2003, 15(1): 1–7. (in Chinese with English abstract)
19 Liao F M, Zhou K L, Sheng X B, Yang H H, Xu Q S. Studies on combining ability of major agronomic characters in three- line indica hybrid rice. Acta Agron Sin, 1999, 25(5): 622–631. (in Chinese with English abstract)
20 Xu X W, Zhang L H, Wang J J, Wang L Y. Analysis on combining ability and heritability of several parents in three- line indica hybrid rice. Seed, 2003(3): 1–4. (in Chinese)
21 Mao Y C, Xu Q G, Hu Z M. Genetic analysis of agronomic characters in early hybrid rice. Chinese Agric Sci Bull, 2005, 21(8): 132–139. (in Chinese with English abstract)
22 Yang C H, Li S G. Analysis of combining ability and heritability of major agronomic characters in three-line CMS lines indica hybrid rice. Southwest China J Agric Sci, 2005, 18(3): 234–237. (in Chinese with English abstract)
23 Qi S W, Sheng X B. Analysis on combining ability and heritability of major agronomic characters in two-line indica hybrid rice. Hybrid Rice, 2005, 15(3): 38–41. (in Chinese with English abstract)
24 Shen S Q, Zhu J. Analysis of genotype × environment effects for some agronomic traits in F1 inter subspecific hybrids of rice (Oryza sativa L.). J Zhejiang Agric Univ, 1997, 23(2): 217–222. (in Chinese with English abstract)
25 Yu S W, Yin J H, Liu Y B, Hu B L, Zhou G X, Peng Z Q. Study on breeding of three-line hybrid rice (Oryza sativa L.): III. Analysis on the combining ability and heritability of main agronomic traits of three-way hybrid rice in mid-late season cropping. Acta Agron Sin, 2005, 31(6): 784–789. (in Chinese with English abstract)
26 Wang X R, Liang K J, Lin W X, Chen Z X, Liang Y Y, Guo Y C, Li Y J. Developmental genetic analysis for plant height in three-line indica hybrid rice. J Fujian Agric & Forestry Univ: Nat Sci, 2002, 31(3): 279–282. (in Chinese with English abstract)
27 Li W, Zhang J Z, Zhang G Q, Zuo Q F. Analysis of heterosis of main agronomic traits of indica-japonica lines. J Southwest Agric Univ, 2002, 24(4): 337–339. (in Chinese with English abstract)
28 Xiao G Y, Yuan L P, Deng X X, Tang L, Luo R L. Studies on the heterosis of indica/javanica and japonica/javanica hybrids rice: II. Analysis of the heterosis of agronomic traits. Acta Agron Sin, 2003, 29(3): 364–371. (in Chinese with English abstract)
29 Zhou G F, Gong G M, Xu G S. A comparative study on heterosis of indica two-line hybrid rice. Hybrid Rice, 1997, 12(4): 26–28. (in Chinese with English abstract)
30 Cao G Q, Zhu J, He C X, Gao Y M, Wu P. QTL analysis for epistatic effects and QTL × environment interaction effects on final height of rice (Oryza sativa L.). Acta Genet Sin, 2001, 28(2): 135–143.
