The effect of the brown midrib‐3 gene on the maturity and yield of forage maize
1985; Wiley; Volume: 40; Issue: 3 Linguagem: Inglês
10.1111/j.1365-2494.1985.tb01761.x
ISSN1365-2494
AutoresR. F. Weller, R. H. Phipps, A. Cooper,
Tópico(s)Ruminant Nutrition and Digestive Physiology
ResumoAbstract Results from two trials with normal and brown midrib‐3 (bm 3 ) types of LG11, Inra 188, Inra 240 and Inra 258 showed the bm 3 mutant gene delayed silking by an average of 3 days, decreased whole plant dry matter (DM) concentration by 20 g kg −1 and the proportion of ear by 4·6 percentage units. Comparable yields of DM were obtained from normal and bm 3 crops. The organic matter digestibility and yield of digestible organic matter of the bm 3 plants was 0.06 units and 14% higher respectively than their normal counterparts. Measurement of the physical strength and resistance to lodging of normal and bm 3 plants showed the bm 3 gene reduced stem strength, which was highly correlated to stem diameter, stem weight and rind thickness. However, the major difference in plant lodging was between genotypes with Inra 240 plants less resistant to lodging than other genotypes. These results show that although the bm 3 gene slightly increased lodging, genotype susceptibility is the major contributing factor to plant lodging.
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