Adaptation and yield stability of selected lines of Lathyrus spp. under rainfed conditions in West Asia

Abstract

Sixteen promising lines (selections) of Lathyrus spp. (chicklings), comprising 11 L. sativus, four L. ochrus, and one L. cicera, were evaluated under rainfed conditions in Syria. Two locations in each of four years were treated as separate environments, to give eight environments altogether. Genotype × environment (G x E) interactions were analysed using linear regression.There was considerable variation in herbage and seed yields within both lines and environments. Genotype × environment interactions were present for both herbage and seed yields; a little over half was accounted for by the linear regression. The non-linear component was also significant, although it was smaller than that of the linear component.The most stable herbage and seed yields were obtained from L. sativus. Two selections, 347 and 311, originating from Syria and Turkey respectively, combined both high herbage and seed yields with wide adaptation and stability, and could be considered the most widely adapted lines. Other lines were identified as suitable for favourable and unfavourable environments; in particular, all four lines of L. ochrus have great potential in frost-free climates. The importance of genotype x environment interactions in future breeding strategies is discussed.

Environmental effect on yield, composition and technological seed traits of some Italian ecotypes of grass pea (Lathyrus sativus L.)

“…The ANOVA results are shown in Table 5. Previous studies reported that seed size is a rather stable trait in grass pea 39, 40. This study showed that, in addition to seed size, also for coat percentage there was no interaction with growing season and location (Table 5).…”

Grain Legumes

“…One reason for the lack of robust data is that analyses of yield stability have predominantly been the domain of plant geneticists and breeders, whereas agronomists have not engaged in this area with the same enthusiasm. Most available data of yield stability in grain legumes refer to intraspecific differences in yield stability (Bond 1987;El-Moneim and Cocks 1992;Dehghani et al 2008). In contrast, comparisons among grain legume species, and between grain legumes and other crops, are relatively rare.…”

Lathyrus improvement for resistance against biotic and abiotic stresses: From classical breeding to marker assisted selection

“…The reasons for this are that most L. sativus and L. ochrus accessions are from low altitude, mild winter environments, whereas many L. cicera accessions are from high altitude, continental environments with severe winter. Nevertheless, tolerance to cold has been reported also in a Portuguese accession of L. ochrus (Abd El-Moneim & Cocks, 1993).…”

“…Serious pest in India, Bangladesh, Ethiopia and Nepal Pandey et al (1995); Neupane (1995) Bruchid beetles Susceptibility of stored seed Hussain et al (1997) Cold High susceptibility Abd El Moneim and Cocks (1993) the plant architectural ideotype, plant breeding should focus on the increase of methionine and homoarginine content and on the increasing resistance to biotic (diseases and pests) and abiotic (cold) stresses. Variation exists in the Lathyrus genus that can be exploited on Lathyrus breeding itself or that can be useful for breeding other related legume species lacking such traits.…”