Author:
Guines F.,Julier B.,Ecalle C.,Huyghe C.
Abstract
An important objective in lucerne breeding is the improvement of feeding
value. An understanding of the inheritance of digestibility and cell wall
related traits would facilitate the breeding of varieties with higher feeding
value. The aim of this experiment was first to determine the genetic control
of dry matter digestibility and related biochemical and morphological traits,
and to assess phenotypic and genetic correlations between these traits.
Quantitative genetic parameters were estimated for enzymatic solubility,
neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent
lignin (ADL), protein content, plant height, and leaf-to-stem ratio. A 7
× 7 diallel design with reciprocals and without selfing among parents
from different populations and a 7 × 7 factorial design within the
‘Flamande’ population were studied. In the diallel study, effects
due to general combining ability (GCA) were higher than those due to specific
combining ability (SCA) for all characters tested. In the factorial study, the
F1 progeny effect was significant for all characters. The male effect was
highly significant for all traits and higher than the female effect except for
plant height. The additive variance was higher than the dominance variance for
all characters except for plant height. The inheritance was predominantly
additive. The highest narrowsense heritabilities were found for NDF and ADF
and leaf-to-stem ratio. As a consequence, NDF or ADF would be more efficient
selection criteria than enzymatic solubility in a breeding program for
improved feeding value. In both mating designs, NDF, ADF, and ADL were
positively correlated with one another and negatively with enzymatic
solubility and protein content.
Subject
General Agricultural and Biological Sciences
Cited by
20 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献