Seed yield and yield stability of determinate and indeterminate autumn-sown white lupins (Lupinus albus) grown at different locations in France and the UK

Abstract

The seed yields and maturity dates of an indeterminate cultivar (Lunoble) and a determinate line (CH304/70) of Lupinus albus L. were measured at three locations in France (Lusignan, Dijon and Gotheron) and at Rothamsted, UK, in 1989/90 and 1990/91. Different combinations of sowing dates, plant densities and irrigation treatments were tested at some sites.Averaged over all sites, CH304/70 yielded more than Lunoble (3-26 v. 2-98 t/ha) but there were significant genotype x location interactions for yield and date of maturity. Both genotypes gave similar yields at the three locations in France (313 and 306 t/ha, respectively). But under the cool and wet conditions at Rothamsted, CH304/70 yielded 4-26 t/ha compared with only 202 t/ha for Lunoble. Yields of CH304/70 were more stable than those of Lunoble across locations and years; the coefficients of variation about the overall means were 14 and 22%, respectively. CH304/70 ripened up to 16 days sooner than Lunoble in France, and 6 weeks earlier than Lunoble in the cooler conditions of the UK.In wet growing conditions (Lusignan 1989/90, Rothamsted 1990/91) Lunoble had increased vegetative growth which decreased the proportion of yield produced by mainstem pods and correspondingly increased the proportion borne on second-order branches. This continued branching also delayed harvest, especially in the UK where the crop was not harvestable until early November. In these conditions, CH304/70 outyielded Lunoble at Lusignan (3-4 v. 2-7 t/ha) and at Rothamsted (4-3 v. 2-0 t/ha) and was harvested acceptably early in mid-September. However, under warm, dry conditions, Lunoble produced only one order of branches at Gotheron and two orders at Lusignan in 1990/91. At Gotheron, both genotypes matured at the same time but CH304/70 yielded slightly better (3-1 v. 2-8 t/ha) because it produced a higher proportion of its yield on the mainstem, whereas at Lusignan, Lunoble yielded better than CH304/70 (4.1 v. 3.4 t/ha) because of extra yield from pods on second-order branches.CH304/70 produced seeds of larger mean size and had greater stability of seed size across years and locations than Lunoble did. This was apparently the result of CH304/70's determinate structure, in which c. 75-100% of the yield was from pods on the mainstem and first-order branches, whose seeds were larger and less variable in size than those from pods on higher-order branches of indeterminates.The development of autumn-sown genotypes with a determinate structure that combine adequate yield and early harvest under cool conditions offers the prospect of extending the geographical range of lupins, grown for grain, both to the cool regions of northern Europe and to hotter and drier regions in southern Europe where summer drought limits the yield of conventional indeterminate types. 178

Genotypic variation of seed yield and architectural traits in dwarf autumn-sown white lupin

“…Seed-yield heritability (0.66) was higher than those calculated for other indeterminate white lupin populations [0.57 (Green et al, 1977) or 0.44 (Le Sech and Huyghe, 1991)] but lower than that calculated for the determinate population [0.78 (Julier et al, 1995)]. Determinate structure improved seed yield stability (Julier et al, 1993), which contributed to reduce the residual variance of seed yield and consequently to improve heritability. Mean seed yield and the large range of variation, as well as the heritability showed that progress in seed yield can be achieved in the dwarf population.…”

Genetics and genetic modifications of plant architecture in grain legumes: a review

“…In addition to the level of yield, yield stability is a major agronomic component. In autumn-sown white lupin, Julier et al [94] found that, over a wide range of agronomic conditions, the determinate genotype under study tended to show a more stable seed yield than the indeterminate genotype. In Phaseolus vulgaris, Kelly et al [95] showed that the determinate types were more unstable than the indeterminate cultivars while White et al [198] reported that on isogenic lines that the determinates were more stable.…”

“…However, whatever the plant density, the threshold for intercepting all the incident light was generally reached later and the duration of maximum interception shorter. As a consequence, the total biomass is generally lower in determinate canopies than in indeterminate canopies for both the faba bean and white lupin [94,124,137]. Besides modifying the total light interception, the determinacy also modifies the penetration of light into the canopies.…”

Induction and inheritance of determinate growth habit in chickpea (Cicer arietinum L.)

“…Under warm climatic conditions at lower latitudes, for instance in Ethiopia (4-18° N), the plants mature early due to drought stress and usually do not grow tall . But under cooler climatic conditions at higher latitudes, (Filippetti, 1986 ;Steele et al ., 1984 ;Gupta & Kapoor, 1991 ;Fehr, 1987 ;Julier et al ., 1993) have gained significant advantage with DT growth habit . Unfortunately, the DT plants in this study were female sterile .…”