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Clonal Variation in Growth and Wood Quality and the multi-trait Index Selection of Chinese Fir

Chinese Forestry Science and Technology 2012年第3期11卷 49-49页

作者： Wang Runhui Hu Dehuo Zheng Huiquan Wei Ruping Huang Yuemao Cai Weijiu Guangdong Academy of Forestry Dakengshan State-owned Forest Farm in Zhaoqing of Guangdong Province

Two clonal trial stands of Chinese Fir （Cunninghamia lanceolata） were used in this study, one was 19-year-old stand which included 38 clones, and the other was 17-year-old stand including 102 *** statistical analyses showed that there were very significant genetic variations in height, DBH,volume and ratio of heartwood(Rhw),wood basic density（ρb ） of the clones in the two stands. The repeatability of clones was in median to high level,and the genetic CV was different over the all five *** were very significant phenotypic and genetic correlations among height,DBH and volume,and negative correlations among growth, Rhw andρb.The selection method experiment indicated that index selection could improve volume, Rhw andρb,showing synthetically superior selection effects compared to any individual trait selection methods.

关键词： Chinese Fir(Cunninghamia lanceolata) clone wood quality multi-trait index selection

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Characterization of early maturing elite genotypes based on MTSI and MGIDI indexes:an illustration in upland cotton(Gossypium hirsutum L.)

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Journal of Cotton Research 2024年第3期7卷 253-265页

作者： D S RAJ Supritha PATIL Rajesh S. PATIL Bhuvaneshwara R. NAYAK Spurthi N. PAWAR Kasu N. Department of Genetics and Plant Breeding College of AgricultureUniversity of Agricultural SciencesDharwad 580005India Agricultural Research Station Dharwad 580005India Department of Biotechnology College of AgricultureUniversity of Agricultural SciencesDharwad 580005India Department of Crop Physiology College of AgricultureUniversity of Agricultural SciencesDharwad 580005India

Background Globally,the cultivation of cotton is constrained by its tendency for extended periods of *** maturity plays a potential role in rainfed-based multiple cropping system especially in the current era of climate *** the current study,a set of 20 diverse Gossypium hirsutum genotypes were evaluated in two crop seasons with three planting densities and assessed for 11 morphological traits related to early *** study aimed to identify genotype(s)that mature rapidly and accomplish well under diverse environmental conditions based on the two robust multivariate techniques called multi-trait stability index(MTSI)and multi-trait genotype-ideotype distance index(MGIDI).Results MTSI analysis revealed that out of the 20 genotypes,three genotypes,viz.,NNDC-30,A-2,and S-32 accomplished well in terms of early maturity traits in two ***,three genotypes were selected using MGIDI method for each planting densities with a selection intensity of 15%.The strengths and weaknesses of the genotypes selected based on MGIDI method highlighted that the breeders could focus on developing early-maturing genotypes with specific traits such as days to first flower and boll *** selected genotypes exhibited positive genetic gains for traits related to earliness and a successful harvest during the first and second ***,there were negative gains for traits related to flowering and boll *** The study identified three genotypes exhibiting early maturity and accomplished well under different planting *** multivariate methods(MTSI and MGIDI)serve as novel approaches for selecting desired genotypes in plant breeding programs,especially across various growing *** methods offer exclusive benefits and can easily construe and minimize multicollinearity issues.

关键词： Cotton MTSI MGIDI Genotype environment interaction Early maturity multi-trait multi-environment

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