Coix属植物の飼料作物化に関する育種学的研究-16-New Coix系統の湛水条件下における形質発現について

IR Web Site

Bibliographic Information

Other Title
  • Coix 属植物の飼料作物化に関する育種学的研究 XVI : New Coix 系統の湛水条件下における形質発現について(農学部門)
  • Coixゾク ショクブツ ノ シリョウ サクモツカ ニ カンスル イクシュガク
  • Studies on the improvements by means of breeding of the genus Coix as fodder crops XVI : On the character manifestation of the New Coix strains grown under submerged field (Agriculture)

Search this article

Description

The primary objective of the present study is to analyze the variations of character manifestation and correlation between characters in improved strains of the genus Coix (New Coix strains) cultured in various environmental conditions of field. Six New Coix strains and their parental strains were grown in submerged and upland fields fertilized three times normal amount of manure. The results are summarized as follows : 1) The differences in character manifestation between submerged and upland fields varied with characters. Irrespective of amount of manure, plant height and leaf area in upland field were superior to those in submerged field, and in case of number of tillers the tendency was reversed. Heavy manuring was more effective for character manifestations in general in upland field than in submerged field. Generally, characters which were fluctuable by change of environments varied largely. As the New Coix strains showed fairly high productivities in submerged field in spite of the somewhat inferior character manifestations as compared to those in upland field, the wet endurances of these strains were recognized considerably strong. 2) Variations in many characters due to the differences in strains were increased by heavy manure in submerged field, but they showed a reverse tendency in upland field. The character manifestations of plant height, culm diameter, leaf thickness, leaf area and pollen fertility were considered fairy stable. 3) Significantly high phenotypic correlations were estimated between plant height and some vegitative characters and all the genetic correlations were still higher than those phenotypic correlations, but environmental correlations were generally low. Negative correlation which had been estimated in the early hybrid generations was not recognized between plant height and number of tillers.

Journal

Details 詳細情報について

Report a problem

Back to top