Summary
Two kinds of wheat hybrids with the same nuclear genotype but different cytoplasms (one with T.timopheevi cytoplasm, i.e., A/R, and the other with T.aestivum cytoplasm, i.e., B/R) were produced by two 3 × 5 incomplete diallel crosses of 3 A-lines, 3 corresponding B-lines and 5 R-lines, respectively. Experimental results did not show significant differences between the hybrids of A/R and B/R in grain filling characteristics and grain weight. The beterosis of grain weight seems mainly determined by the nuclear genotype. Although the seeds set on most A-lines were shrivelled, such a phenomenon was not found in grains set on F1. The duration of the lag period (D1) and the average grain filling rates during the linear period and the mature period (i.e., FR2 and FR3) were significantly and positively related to 1000-grain weight. It was in these factors that most hybrids displayed clear mid-parent (MP) heterosis. The amount of grain weight heterosis was not significantly related to MP value. This indicates that the grain weight heterosis of wheat hybrids will not decrease with an increase of the MP value.
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References
Bitzer, M.J., F.L.Patterson & W.E.Nyquist, 1982. Hybrid vigor and combining ability in a high-low yielding, eight-parent diallel cross of soft red winter wheat. Crop Sci. 22: 1126–1129
BiXinhua & Dai XinWei., 1980. Effects of precipitation on seed weight and yield. In. Seed Research Group of Zhejang Agricultaral University (Ed.) Seed Science, pp 126–127. Shanghai Science and Technology Publishers, Shanghai. (in Chinese).
Brocklehurst, P.A., 1977. Factors controlling grain weight in wheat. Nature 266: 248–249
Doig, R.I., A.A.Done & D.F.Rogers, 1975. Preharvest sprouting in bread wheat as influenced by cytoplasmic male sterility derived from T. timopheevi. Euphytica 24: 229–232
Gebeyehou, G., D.R.Knott & R.J.Baker, 1982. Relationships among durations of vegetative and grain filling phase, yield components, and grain yield in durum wheat. Crop Sci. 22: 287–270.
Housley, T.L., A. W.Kirleis, H, W.Ohm & F.L.Patterson, 1982. Dry matter accumulation in soft red winter wheat seeds, Crop Sci. 22: 290–299
LiYouchun, 1992. The analysis of relationships between grain yield components of T type hybrid wheat. J. Sichuan Agric Univ. 100: 19–25. (in Chinese)
Rai, R.K., 1978. Influence of male sterility (T. timopheevi Zhuk. cytoplasm) on F1 seed in common wheat. Proc. 5th Intern. Wheat Genet. Symp. 299–305
SunQixin & GuoYuxiang, 1985. Morphological and genetic basis of the expressions of heterosis for yield and its components in hybrid winter wheat with T. timopheevi cytoplasm 2. Heterosis and combining ability. Acta Agriculturae Universitatis Pekinensis 11: 65–73. (in Chinese)
Virmani, S.S. & Lan B.Edwards, 1984. Current status and future prospects for breeding hybrid rice and wheat. Advances in Agronomy 36: 145–214
Wiegand, C.L. & J.A.Cuellar, 1981. Duration of grain filling and kernel weight of wheat as affected by temperature. Crop Sci. 21: 95–101
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Zhongqi, L., Youchun, L. Heterosis of grain weight in wheat hybrids with Triticum timopheevi cytoplasm. Euphytica 75, 189–193 (1994). https://doi.org/10.1007/BF00025603
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DOI: https://doi.org/10.1007/BF00025603