Inheritance of quantitative traits in crosses between two Pisum sativum subspecies with particular reference to their breeding value

Abstract

The experimental study was conducted during the period of 2008-2010 at the experimental field of the Institute of Forage Crops in Pleven. The hybridization scheme included direct and back crosses cover ing four varieties of forage pea (Pisum sativum L.), namely two spring ones, Usatii 90 and Kamerton from Ukraine, and a winter one from Bulgaria, Pleven 10. There was analyzed the inheritance of quantitative traits such as plant height, height to first pod, pod number per plant, seed number per plant, seed number per pod, seed weight per plant and number of fertile nodes per plant of parental components (P 1 and P 2 ) and both first (F 1 ) and second (F 2 ) hybrid generations. The cross Usatii 90 × Pleven 10 showed the highest real heterosis effect for plant height (8.26%), pods per plant (158.79%), seeds per plant (272.16%), seeds per pod (42.09%), seed weight per plant (432.43%) and number of fertile nodes per plant (117.14%). The cross Pleven 10 × Usatii 90 had the highest real heterosis effect height to first pod (11.06%). In F 2 plants, the strongest depres sion for plant height (5.88%), seeds per plant (57.88%), seeds per pod (55.93%) and seed weight per plant (55.99%) was in the cross Usatii 90 × Pleven 10, for height to first pod (1.47%) in the cross Kamerton × Pleven 10 and for number of fertile nodes per plant (15.91%) in the cross Pleven 10 × Usatii 90. The highest positive degree of transgression for number of fertile nodes per plant (165.64%) and seed weight per plant (162.10%) was in the cross Pleven 10 × Kamerton and for pod number per plant (102.54%) and seeds per plant (99.13%) in Kamerton × Pleven 10. The stability of the characters was determined. Low variability in F 1 and F 2 was found in plant height (3.97-6.85%). Variability of number seeds per plant in F 1 was highest (11.86-33.23%). For all other traits, the variability varied from average to high. A lower narrow sense heritability coefficient was observed for plant height, height to first pod, pods per plant, seeds per plant and seed weight per plant (from 0.001 to 0.230). In few cases, such as in fertile nodes per plant (0.39 and 0.81) and seeds per pod (0.44), the coefficients of broad sense heritability were higher.

Genetic Diversity Among Varieties and Hybrid Lines of Pea (pisum sativuml.) as Revealed by Morphological Traits and SSR Markers

“…The measurements of morphological traits clearly indicated that hybrids generally have higher values compared to their parents (Hamouda et al, 2012). This is congruent with the suggestion that hybridization breeding improves the productivity and yield as reported by Sarawat et al (1994), and confirmed by Ceyhan et al (2008) and Kosev et al (2012). These observations are consistent with the reports by Ceyhan et al (2008) and Kosev et al (2012) who analyzed the inheritance of quantitative traits such as plant height, days to first pod, number of pods per plant, number of seeds per plant, seed weight per plant and number of fertile nodes per plant of parental components.…”

Transgressive Segregation, Heterosis and Heritability for Yield-Related Traits in a Segregating Population of Pisum Sativum L.

“…In the present study, the values obtained for SW were lower (38.1 in 2014 and 42.2% in 2015), whereas values obtained for NS were lower in 2014 (51.7%) and higher in 2015 (89.3%). On the other hand, Kosev et al (2012) evaluated F 1 and F 2 populations generated from different crosses between three varieties, namely Usatii 90, Kamerton and Pleven 10, and obtained low narrow heritability values (between 0.01 and 44%) for PH, NP, NS, SW and SP. BLUP is a standard method for the prediction of genotypic values free of any environmental effects.…”

“…On the other hand, Kosev et al . (2012) evaluated F 1 and F 2 populations generated from different crosses between three varieties, namely Usatii 90, Kamerton and Pleven 10, and obtained low narrow heritability values (between 0.01 and 44%) for PH, NP, NS, SW and SP.…”

Agronomic characteristics related to grain yield and crude protein content in common vetch (Vicia sativa) accessions of diverse geographic origin

“…In the current study, the common vetch accessions had greater grain numbers compared with the results for field pea in Pleven, Bulgaria, that ranged from 17.9 to 69.1 plant −1 (Kosev et al 2012). The tested common vetch accessions had a similar thousand grains mass as the local landraces of common vetch from the region of Tokat, Turkey, with an average of 59 g (Taser et al 2005).…”