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Comparisons of Photosynthetic Characteristics in Relation to Lint Yield Among F_1 Hybrids, Their F_2 Descendants and Parental Lines of Cotton 被引量:2
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作者 FENG Guo-yi GAN Xiu-xia +3 位作者 YAO Yan-di LUO Hong-hai ZHANG Ya-li ZHANG Wang-feng 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2014年第9期1909-1920,共12页
We compared the photosynthetic characteristics in relation to yield of two F1 cotton hybrids(Shiza 2-F1 and Xinluzao 43-F1), their parental lines(NT2, H2 and 4-14) and their F2 descendants at different growth and ... We compared the photosynthetic characteristics in relation to yield of two F1 cotton hybrids(Shiza 2-F1 and Xinluzao 43-F1), their parental lines(NT2, H2 and 4-14) and their F2 descendants at different growth and development stages. The two F1 exhibited heterobeltiosis in net photosynthetic rate(Pn) 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 Pn, SPAD and CAP in the F1. A low CR in the F1 matched a low CR of the parental line. Photosynthetic characteristics in the F2 were mainly dependent upon the magnitude and degeneration rate of the F1. Mid-parent heterosis in CAP and in CR during the late growth and development stage reduced the degeneration of the F2. Average dry matter accumulation was 10.7-34.7% higher in the parental lines of Xinluzao 43-F1 than in the parental lines of Shiza 2-F1. Heterobeltiosis in dry matter accumulation was 7.0-23.1% greater for Xinluzao 43-F1 than for Shiza 2-F1. Dry matter accumulation in the F1 was affected by either the dry matter accumulation of parents or heterobeltiosis. Dry matter accumulation in the F2 was mainly influenced by dry matter accumulation in the F1. The yields of the two F1 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 F2 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 F1 and F2 were higher than that of their parents. The increases in Pn and CAP of the F1 and F2 were dependent on the photosynthetic characteristics of their parents. It is thus concluded that the photosynthetic performance, light use efficiency and yield of the F1 can be improved by using at least one parent with low CR, but high CAP, Pn and SPAD. This strategy might also improve the value of the F2. 展开更多
关键词 hybrid cotton heterosis photosynthetic characteristics f2
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转基因抗虫组合F_2代群体农艺性状变异及其利用价值评估 被引量:18
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作者 王武 张献龙 +1 位作者 孙济中 聂以春 《棉花学报》 CSCD 北大核心 2002年第1期8-12,共5页
用陆地棉品种间杂种一代产量高、优势强杂交组合的 F2 代群体作为基础材料 ,对 F2 和 F2∶ 3 家系分别按单株考种 ,并利用相关分析软件对多个经济性状的次数分布作了比较分析 ,结果表明这些性状表现为连续的正态分布 ,为典型的多个微效... 用陆地棉品种间杂种一代产量高、优势强杂交组合的 F2 代群体作为基础材料 ,对 F2 和 F2∶ 3 家系分别按单株考种 ,并利用相关分析软件对多个经济性状的次数分布作了比较分析 ,结果表明这些性状表现为连续的正态分布 ,为典型的多个微效基因控制的数量性状。对 F2 代群体中单株纤维品质性状的分析表明 :F2 代的均值与 F1代的各项指标平均数差异不显著。但从 F2 群体具体组成上分析就会得出绝然相反的结论。所以在生产上应充分利用优势组合的杂种一代的杂种优势 ,对其二代的利用则应谨慎评价。 展开更多
关键词 陆地棉 杂种优势 f2 群体农艺性状 利用价值 转基因抗虫棉
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9个转基因杂交棉组合的优势比较研究
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作者 周德桂 梅正鼎 《棉花科学》 2015年第1期29-35,共7页
以转基因抗虫杂交棉9个(代号为B1-B9)新组合和湘杂棉7号(对照)为材料,进行生育性状、光合特性、产量性状和品质性状等方面进行系统的比较分析。研究结果表明:各组合与对照在生育期、株高、果枝数方面无显著差异;B3的早熟性、结... 以转基因抗虫杂交棉9个(代号为B1-B9)新组合和湘杂棉7号(对照)为材料,进行生育性状、光合特性、产量性状和品质性状等方面进行系统的比较分析。研究结果表明:各组合与对照在生育期、株高、果枝数方面无显著差异;B3的早熟性、结铃性、叶绿素含量、籽棉产量和纤维品质均优于对照;B5、B6、B9的籽棉产量与对照无显著差异,B1、B2、B4、B7、B8叶绿素含量偏低、皮棉减产,品质也略差。综合各方面的因素,B3叶绿素含量高,有利于光合产物生产和供应,且铃大,结铃性强、产量高,纤维品质优,符合湖南省棉花新品种审定的产量及品质要求。 展开更多
关键词 湖南 杂种优势 杂交棉 光合特性 产量 品质
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