Comparisons of Photosynthetic Characteristics in Relation to Lint Yield Among F-1 Hybrids, Their F-2 Descendants and Parental Lines of Cotton
文献类型： 外文期刊
作者： Feng Guo-yi 1 ; Gan Xiu-xia 1 ; Yao Yan-di 1 ; Luo Hong-hai 1 ; Zhang Ya-li 1 ; Zhang Wang-feng 1 ;
作者机构： 1.Shihezi Univ, Xinjiang Prod & Construct Corps, Key Lab Oasis Ecoagr, Coll Agr, Shihezi 832003, Peoples R China
2.Hebei Acad Agr & Forestry Sci, Minist Agr, Key Lab Biol & Genet Improvement Cotton Huanghuai, Cotton Res Inst, Shijiazhuang 050051, Peoples R China
关键词： hybrid cotton;heterosis;photosynthetic characteristics;F-2
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2014 年 13 卷 9 期
页码：
收录情况： SCI
摘要： We compared the photosynthetic characteristics in relation to yield of two F-1 cotton hybrids (Shiza 2-F-1 and Xinluzao 43-F-1), their parental lines (NT2, H2 and 4-14) and their F-2 descendants at different growth and development stages. The two F-1 exhibited heterobeltiosis in net photosynthetic rate (P-n) by 8.1-52.1%, canopy apparent photosynthetic rate (CAP) by 8.2-57.6% and canopy respiration rate (CR) by 3.0-78.7% during the growing season. They also exhibited mid-parent heterosis by 2.0-5.2% in leaf chlorophyll content (SPAD) during the late growth and development stages. Regression analysis showed that both parents contributed to increase in P-n, SPAD and CAP in the F-1. A low CR in the F-1 matched a low CR of the parental line. Photosynthetic characteristics in the F-2 were mainly dependent upon the magnitude and degeneration rate of the F-1. Mid-parent heterosis in CAP and in CR during the late growth and development stage reduced the degeneration of the F-2. Average dry matter accumulation was 10.7-34.7% higher in the parental lines of Xinluzao 43-F-1 than in the parental lines of Shiza 2-F-1. Heterobeltiosis in dry matter accumulation was 7.0-23.1% greater for Xinluzao 43-F-1 than for Shiza 2-F-1. Dry matter accumulation in the F-1 was affected by either the dry matter accumulation of parents or heterobeltiosis. Dry matter accumulation in the F-2 was mainly influenced by dry matter accumulation in the F-1. The yields of the two F-1 were 39.1-46.3% higher than their respective parents and 26.4-45.9% higher than that of the conventional cultivar Xinluzao 33. The yields of the two F-2 were 9.2-12.8% higher than the parents and 14.9-27.4% higher than that of Xinluzao 33. The photosynthetic production and yield of the F-1 and F-2 were higher than that of their parents. The increases in P-n and CAP of the F-1 and F-2 were dependent on the photosynthetic characteristics of their parents. It is thus concluded that the photosynthetic performance, light use efficiency and yield of the F, can be improved by using at least one parent with low CR, but high CAP, P-n and SPAD. This strategy might also improve the value of the F-2.
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