GENERATION MEAN ANALYSIS OF EARLINESS AND CHOCOLATE SPOT DISEASE RESISTANCE AND QUALITATIVE VARIATION IN THE STORAGE PROTEINS OF THREE Vicia faba L. CROSSES

Abstract

Production of grain legumes is limiting by the usual array of pathogenic that affect plants. The present study was conducted during 2005/06, 2006/07 and 2007/08 seasons at Sakha Agricultural Research Station (SARS). A quantitative analysis were done by using six generations mating design between five faba bean parental genotypes namely; Rena Mora, Sakha1, Giza 3, Sakha 2 and T.W to produces three crosses namely; Rena Mora x Sakha1, Giza 3 x Rena Mora and Sakha 2 x T.W. The parental genotypes could be arranged in to three groups. The first group included; Rena Mora, Sakha 1 and Sakha 2 where it is considered as the most resistant group to chocolate spot and high yielding ability. The second group included Giza 3 which is moderate resistant to chocolate spot and the third group include T.W as susceptible genotypes with low yielding potentiality. The data revealed that, the parental genotypes and their crosses had the highest value of variation according to relation to chocolate spot reaction and maturity date. Heterosis over mid and better parent for all traits were highly significant except chocolate spot reaction in the two crosses; (Rena Mora x Sakha1) and (Sakha 2 x T.W.) relative to mid parents. And also, for no. of pods/plant in the cross; (Rena Mora x Sakha1) relative to better parent. Potence ratios were exceeded unity for most traits indicating over dominance. On the other hand, the values of this parameter were less than unity in the cross; (Sakha 2 x T.W.) for maturity date, no. of branches/plant, seed yield/plant(g), 100 seed weight and chocolate spot reaction, indicating partial dominance. The inbreeding depression estimates were highly positively significant for no. of pods/plant, no. of seeds/plant and seed yield/ plant(g) in the two crosses (Rena Mora x Sakha1) and (Giza 3 x Rena Mora). The additive type (a) was significant positive or negative values in all of crosses for all traits except in the cross; (Rena Mora x Sakha 1). For dominance effect (d) it was and higher in magnitude than that of additive type of gene effects. The additive x additive gene effect was highly positive significant in most crosses except in the cross; (Rena Mora x Sakha 1) for no. of branches/plant. However, highly significant positive epistatic gene action (ad) was observed in the first cross; (Rena Mora x Sakha 1) for no. of branches/plant, no. of pods/plant, no. of seeds/plant and chocolate spot reaction. Heritability values in broad-sense were generally higher than the corresponding values in narrow-sense in all crosses for all traits. The additive genes seems to play an important role of the inheritance of maturity date, no. of branches/plant, no. of pods/plant and chocolate spot reaction in the cross; Rena Mora x Sakha1, where the differences between broad and narrow-sense heritability were closest. The indirect selection in the progeny of the crosses; Rena Mora x Sakha 1 and Giza 3 x Rena Mora and direct selection in the progeny of the cross (Sakha 2 x T.W.) would be fruitful due to the high values of narrow-sense h...

Genetic Analysis of Chocolate Spot and Rust Disease Resistance and Some Yield Related traits in Three Faba Bean Crosses

“…The high percentage of expected genetic advance would help the breeder in improving the trait of interest via few cycles of selection. These results are in good agreement with those reported by Abo Mostafa et al (2009), El -Hady et al (2009 and Abou-Zaid (2018). Table 6.…”

“…The obtained results herein were in agreement with this anticipation. These results are in harmony with those reported by Hendawy (1994), El -Hosary et al, (1997), El-Hady et al, (1998, Toker ( 2004), Attia et al, (2006), Abo Mostafa et al, (2009), El-Hady et al, (2009 and Abou-Zaid (2018). Estimation of type of gene action: testing for non-allelic interactions with the five-parameter model and type of epistasis given in Table 5.…”

HERITABILITY AND GENE EFFECTS FOR DISEASE RESISTANCE, YIELD AND ITS COMPONENTS IN THREE FABA BEAN CROSSES (Vicia faba L.).

“…of pods/plant in the second cross and rust disease reaction in the first cross with values 75.00% and 73.68%, respectively. These results were in harmony with those obtained by Abdalla et al (1999), Mansour et al (2001), Darwish et al (2005), El-Hady et al (2007, Abou Mostafa et al (2009), El-Hady et al (2009 and Ashrei et al (2013).…”

“…Also, selecting desirable genotypes can ' t be practiced in the early generation but it would be effective in the late ones. Similar results were obtained by Abo Mostafa et al (2009), El-Hady et al (2009, Ashrei et al (2013), El-Refaey and Abd El-Razek (2013) and Abo Mostafa et al (2014).…”

“…In addition, the conflicting estimates of heterosis and inbreeding depression were associated in most traits. Similar conclusion were reviewed by El-Refaey and Radi (1991), El-Hady et al (1998), Darwish et al (2005), Attia and Salem (2006), Attia (2007), El-Hady et al (2008, Abo Mostafa et al (2009) and El-Hady et al (2009). ), expected (Ga) and predicted (Ga%) genetic advance, genotypic coefficient of variation (GCV%) and phenotypic coefficient of variation(PCV%) of the three faba bean crosses for the studied traits.…”