Heritability estimates for seed yield and its components in Cynodon dactylon var. dactylon (L.) Pers.  

作　　者：Chengcheng Tan Yanqi Wu Charles M.Taliaferro Greg E.Bell Dennis L.Martin Mike W.Smith 

机构地区：[1]Department of Plant and Soil Sciences,Oklahoma State University,Stillwater,OK 74078,USA [2]Oklahoma Department of Agriculture,Food and Forestry,2800 N.Lincoln Blvd.,Oklahoma City,OK 73105,USA [3]Department of Horticulture and Landscape Architecture,Oklahoma State University,Stillwater,OK 74078,USA

出　　处：《Grass Research》2022年第1期48-53,共6页草学研究（英文）

基　　金：supported,in part,by the United State Department of Agriculture Specialty Crop Research Initiative award 2010-51181-21064,the Oklahoma Agricultural Experiment Station,and the United States Golf Association.

摘　　要：Bermudagrass[Cynodon dactylon var.dactylon(L.)Pers.]is a major warm-season turf and forage grass worldwide.Seed yield is an important trait targeted for improvement in bermudagrass breeding programs because of the increased interest in seed-propagated cultivars.Understanding the nature of genetic variation for seed yield and its components in bermudagrass would aid the development of seed-propagated cultivars.The objective of this study was to estimate the genetic variation and narrow-sense heritability for seed yield and its two major components,inflorescences prolificacy and seed set percentage in bermudagrass.Twenty-five half-sib families and their respective clonal parents were evaluated at two Oklahoma locations,Perkins and Stillwater(Oklahoma,USA),over two years.Half-sib families were different for seed yield,inflorescences prolificacy and seed set percentage,indicating the expression of additive genes in controlling these traits.Family×location effects were observed for seed set percentage and seed yield.All three traits showed family×year interaction effects.There was a significant family×location×year interaction in inflorescences prolificacy and seed set percentage.Narrow-sense heritability estimates for seed yield was 0.18 based on variance component analysis among half-sib families and ranged from 0.26 to 0.68 based on parent-offspring regressions,indicating genetic complexity of seed yield.Heritability estimates were moderate(0.30−0.55)for inflorescences prolificacy and moderate to relatively high(0.41−0.78)for seed set percentage.The results indicate that sufficient magnitudes of additive genetic variation for seed set percentage and inflorescence prolificacy permit positive response to selection and conventional progeny-based genotypic evaluation is necessary for seed yield improvement.Citation:Tan C,Wu Y,Taliaferro CM,Bell GE,Martin DL,et al.2022.Heritability estimates for seed yield and its components in Cynodon dactylon var.

关 键 词：dactylon CULTIVAR BREEDING 

分 类 号：S548[农业科学—作物学]