Varietal Classification of Introduced Forage Sorghum Germplasm for Parental Line Selection on $F_1$ Hybrid Breeding

사료용 수수 1대잡종 육성 모재 선정을 위한 도입 유전자원의 품종군 분류

  • 강정훈 (농업과학기술원) ;
  • 이호진 (서울대학교 농업생명과학대학 농학과)
  • Published : 1996.06.01

Abstract

To obtain basic information on forage sorghum F$_1$ hybrid breeding a total of 16 lines were selected from 311 introduced sorghum germplasm accessions, assessed and classified by the taxonomic distance and principal component analysis. The lines of which plant height and morphological characters were diverse and the 50% flowering date was similar to each other, were selected for parental lines in sorghum $\times$ sweet sorghum and sorghum $\times$ sudangrass crossing groups. Three varietal groups were classified by the average linkage cluster analysis based on the D$^2$ computed in eleven characters. Group I, II and III included 6 lines of sudangrass, 4 lines of sweet sorghum and 6 lines of grain sorghum, respectively. In the result of principal component analysis for eleven characters, about 82% of total variation could be appreciated by the first four principal components, the first principal component was highly loaded with head compactness and shape, l00-seed weight, plant color and grain covering, the second principal component with flowering date, plant height and awnness.