Stem and canopy attributes that affect lodging resistance in lentil

Abstract

Ball, R. A., Hanlan, T. G. and Vandenberg, A. 2006. Stem and canopy attributes that affect lodging resistance in lentil. Can. J. Plant Sci. 86: 71-81. Many lentil (Lens culinaris L.) cultivars currently grown in Western Canada are susceptible to lodging. The objective was to determine if plant traits associated with lodging but independent of environmental influences could be used for indirect selection of lodging resistance. For a range of canopy variation, eight genotypes were grown at three plant population densities in the field in 2001 and 2002 at five locations. Four unadapted genotypes (designated FLIP), varying in plant profile and stem stiffness, were compared with locally adapted cultivars. Lodging is a complex trait and was influenced by both genetic differences among the genotypes and environmental conditions. Large green market class cultivars had weak stems and lodged easily. As the canopy's ability to recover from crushing increased, lodging increased due to greater plant biomass. The greater the fiber content in the plant stems, the more biomass and more lodging occurred. Genotypic ranking of stem diameter was consistent across locations, and stem diameter may be used to indirectly select for lodging resistance. From regression analysis, stem diameter and lodging were described by branch number, recovery from canopy crushing, plant density, height, stem fiber content and lignin content; branch number, plant density and plant height were the most influential terms. For screening lodging resistance in crosses made from a lodging resistant genotype and a highly lodging susceptible genotype, selection of progeny with the smallest stem diameter should be the most lodging resistant, although yields will be reduced. Selection procedures would involve seeking large diameter stems but with similar stem traits of the small-stemmed FLIP lines. La verse s'accroît avec la capacité du couvert de se remettre de l'écrasement en raison de la plus grande biomasse. Plus la tige des plants est fibreuse, plus la biomasse est importante, donc la verse également. Le classement des génotypes en fonction du diamètre de la tige reste le même d'un endroit à l'autre, aussi pourrait-on utiliser ce caractère pour sélectionner indirectement la résistance à la verse. S'appuyant sur l'analyse de régression, les auteurs décrivent le diamètre de la tige et le degré de verse d'après le nombre de ramifications, le rétablissement après écrasement du couvert, la densité de semis, la hauteur ainsi que la concentration de cellulose et de lignine dans la tige. Le nombre de ramifications, la densité de semis et la hauteur sont les paramètres qui exercent la plus forte influence. Quand on cherche à déceler les hybrides résistants issus du croisement entre un génotype résistant et un autre très sensible, la progéniture présentant les tiges du plus petit diamètre devrait être aussi celle qui résiste le mieux à la verse, mais on assistera parallèlement à une diminution du rendement. Les méthodes de sélection devraient inclure la recherche de ...

Effect of planting density on lodging-related morphology, lodging rate, and yield of tartary buckwheat (Fagopyrum tataricum)

“…Thus, at high density, intense intraspecific competition decreases the amount of light available to coexisting plants, leading to taller plants, smaller main-stem diameters, elongated lower internodes, fewer internodes, less number of first lateral root, and smaller volume (Tables 2 and 3). These agronomic traits are often considered as the key characteristics affecting lodging incidence in case of lentil (Ball et al, 2005). In this study, the plant height, internode number, first internode length, first internode diameter, number of first lateral root, and root volume were significantly correlated with LR (Table 7).…”

Yield gap analysis extended to marketable grain reveals the profitability of organic lentil-spring wheat intercrops

“…Lodging is another common issue for lentil which results from a combination of genotypic and environmental factors (Ball et al 2006). Lentil shoots collapse if unfavourable weather (e.g.…”

SOIL FERTILITY AND GENOTYPE AFFECT YIELD COMPONENTS AND MINERAL GRAIN CONCENTRATION OF COMMON BEANS (Phaseolus vulgaris L.)

“…Low fertility can lead to crop lodging at harvest, which is a major limitation for mechanized harvest of common beans (Horn et al, 2000). Lodging is caused by a combination of factors, including larger row spacing, lower plant populations, environmental conditions, and cultivar susceptibility (Ball et al, 2006, Crook & Ennos, 1995. Ball et al (2006) point out that more vigorous stems build crop canopies capable to prevent and recover from lodging.…”

“…Lodging is caused by a combination of factors, including larger row spacing, lower plant populations, environmental conditions, and cultivar susceptibility (Ball et al, 2006, Crook & Ennos, 1995. Ball et al (2006) point out that more vigorous stems build crop canopies capable to prevent and recover from lodging. Seed weight, which was affected only by cultivar, is a stable plant parameter across environments and it is driven mainly by variation within cultivars, having a strong contribution for the genetic dissimilarity between common bean cultivars (Barbosa & Gonzaga, 2012, Martinho Correa & Gonçalves, 2012, Bezerra, Neves, Rocha, & Brito, 2017.…”