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Selection of female parents with high fertility and high combining abilities for cross-breeding Populus tomentosa

Journal of Forestry Research 2019年第2期30卷 445-450页

作者： Feng-ying Bai Ning Kang Ping-dong Zhang Xiang-yang Kang National Engineering Laboratory for Tree Breeding Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing Laboratory of Urban and Rural Ecological Environment Beijing Forestry University

To select maternal parents with high fertility and high combining ability during cross breeding of Populus tomentosa Carr., the ploidy level of 75 female clones was determined using flow cytometry. In addition, genetic variations and phenotypic correlations of seed traits and early growth traits, as well as the general combining ability(GCA) for seedling height(SH) and basal diameter(BD) of all diploid half-sib families were examined. A total of 26 natural triploid clones were identified. For all diploid families, family effects were significant for inflorescence length(IL), thousand kernel weight(TKW), seedling emergence rate(SER), and for SH and BD. There was a positive correlation between TKW and other traits,excluding IL. The seed-bearing coefficient(NS 9 SER)ranged from zero to 32.4%. Clones 3-10-2, 2-8, 3119,3206, and 3-10-1 had the best performance of the GCA for SH and BD. Based on the fertility and GCA for SH and BD, clone 3-10-2 and clone 3119 could be used as female parents for controlled cross-breeding of P. tomentosa.

关键词： Fertility ability General combining ability Genetic variation half-sib family Populus tomentosa

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Genetic Variation for Biomass and Related Morphological Traits in Cup Plant (<i>Silphium perfoliatum</i>L.)

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American Journal of Plant Sciences 2015年第8期6卷 1098-1108页

作者： Teshale Assefa Jixiang Wu Kenneth A. Albrecht Paul J. Johnson Arvid Boe Plant Science Department South Dakota State University Brookings SD USA Department of Agronomy University of Wisconsin-Madison Madison WI USA

Cup plant (Silphium perfoliatum L.) has demonstrated potential for bioenergy production in North America, South America, and Europe. Our objectives were to: 1) determine genetic variation and narrow-sense heritability for biomass and related morphological traits, and 2) identify half-sib families with superior biomass yield and potential for use in cultivar development in cup plant. Thirty three half-sib families and a check were evaluated at two locations in 2011, 2012, and 2013. Annual biomass yield at Brookings ranged from 2183 kg·ha-1 in 2012 to 8053 kg·ha-1 in 2013;whereas, yields at Arlington were similar among years. Mean individual half-sib family biomass yield ranged from 3912 to 6784 kg·ha-1 at Brookings and from 5682 to 11,269 kg·ha-1 at Arlington. Heritability estimates for five biomass-related morphological traits ranged from 0.52 to 0.72. This cup plant population had potential for biomass production in the north central USA and contained sufficient additive genetic variation to expect progress from among-and-within-family selection for biomass yield and related traits.

关键词： Cup Plant half-sib Families Heritability

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