Genetic analysis of maturity and flowering characteristics in maize (Zea mays L.)

Sher, Hassan; Iqbal, Muhammad; Khan, Khurram Ajaz; Yasir, Muhammad; Hameed-ur-Rahman,

doi:10.1016/s2221-1691(12)60108-7

Cited by 14 publications

(10 citation statements)

References 15 publications

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“…GCA/SCA ratio close to zero suggested that non-additive gene effects played a bigger role than additive gene effects. These results are in line with those found by Gadag et al (1999), Sharma (2004) and Sher et al (2012). In contrast, Wanderi (2012) found that only the additive gene effects were important in the inheritance of the trait.…”

Section: Agronomic Traitssupporting

confidence: 91%

“…The highly significant GCA and SCA for duration to maturity (P<0.01) suggested that both the additive and non-additive gene action was important in determination of this trait. Similar results were reported by Srivastava et al (1978), Limproongratna and Maneephong (1979), Tukamuhabwa et al (2002), Agrawal et al (2005), Gavioli et al (2006) and Sher et al (2012). GCA/SCA ratio close to zero suggested that non-additive gene effects played a bigger role than additive gene effects.…”

Section: Agronomic Traitssupporting

confidence: 85%

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Untitled

2019

IJAPR

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Eight parents Nyala and SB-8, SB-25, SB-93, SB-19, 915/5/12, 835/5/30 and SB-98 were crossed in a diallel mating scheme to generate 28 F1 progenies in a greenhouse at Kabete, University of Nairobi. The F1 and their parents were evaluated at KALRO-Embu and Mwea Research Centers between December 2016 and May 2017. The trials were laid out in an alpha-lattice design arranged in a 6 × 6 pattern with 3 replicates. Data was collected on maturity, plant height, grain yield and pod shattering. General and specific combining ability were determined according to Griffing's diallel, Method 2. General and specific combining ability (GCA and SCA) were significant (P<0.05) for all the traits indicating that additive and non-additive gene action were important in the inheritance of pod shattering and other traits. GCA/SCA ratio varied from 0.00124 to 0.0742. Although the ratio was higher for pod shattering (0.0742) compared to other traits (less than 0.0132), the ratio in general was close to zero. This indicated that non-additive gene action played a more important role over additive gene action in the inheritance of these traits. Parents SB-93, SB-19, SB-98, 835/5/30 and Nyala, were the best combiners for early maturity. SB-19, 915/5/12, Nyala, SB-93 and SB-98 significantly contributed towards reduced plant height. Parent 835/5/30 followed by SB-8 had the higher GCA gene action thus were the best combiners for high grain yield. Parents SB-8 and Nyala had the highest negative and significant GCA effects for pod shattering indicating that these lines had favorable gene frequencies of resistance to pod shattering. Progenies of SB-25 x SB-8 were the best combiners for pod shattering resistance across environments. This study found non-additive gene action to be more important over additive and suggested that heterosis breeding and selection of late segregating generations would be effective to improve pod shattering resistance ability and other agronomic traits in soybeans.

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Section: Agronomic Traitssupporting

confidence: 91%

Section: Agronomic Traitssupporting

confidence: 85%

Untitled

2019

IJAPR

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“…This finding was in accordance with the results of other researchers (Atanaw et al 2006;Hefiny 2010;Hema et al 2001). On the other hand, dominance and non-additive effects were found to be significant in some other studies (Sher et al 2012;Irshad ul Hag 2014). These contrasting findings suggest that different material may have different genetic effects on flowering traits.…”

Section: Resultsmentioning

confidence: 78%

Mısırda Çiçeklenmenin Gün ve Termal Süreye Göre Genetik Analizi

Kahrıman¹,

Egesel²,

Cebeci³

et al. 2015

Yüzüncü Yıl Üniversitesi Tarım Bilimleri Dergisi

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The objectives of this study were to investigate the genetic effects on flowering traits in maize and to determine the suitable families for potential use in the future breeding studies. Six generations (P1, P2, F1, F2, BcP1F1, BcP2F1) of five different maize families were used as plant material in this study. These materials were generated in the years of 2011 and 2012, than evaluated in 2013. Four flowering traits (days to tasseling, days to pollen shading, days to silking and anthesis silking interval) were investigated. Type of gene action, narrow heritability values, effective gene number and genetic gain from selection for investigated traits were determined by the Generation Mean Analysis method. A considerable variation for the evaluated traits was found among the families and their generations. The results of the study showed that few genes had effect on the evaluated flowering traits. Additive gene action was preponderance for most of the flowering traits, while dominance and epistatic interactions were significant just in two families. In terms of the significance of gene effects, the results were similar from both calendar and thermal time calculations, but not for the heritability estimations. Some of the families (IHOxMo17, IHPxHya, Mo17xIHO) showed potential for effective selection for flowering traits.Özet: Bu çalışmanın amaçları, mısırda çiçeklenme özelliklerine etki eden gen tipinin incelenmesi ve ilerde yapılacak ıslah çalışmalarında kullanıma uygun olan aileler tespit edilmesidir. Çalışmada materyal olarak beş farklı aileye ait altı farklı nesil (P1, P2, F1, F2, BcP1F1, BcP2F1) kullanılmıştır. Bu materyal 2011 ve 2012 yılında oluşturulmuş ve 2013 yılında değerlendirme denemesine alınmıştır. Dört çiçeklenme özelliği (tepe püskülü çıkarma, polen dökme, koçan püskülü çıkarma ve koçan püskülü çıkarma polen dökme aralığı) gün ve termal süre bazlı olarak ele alınmıştır. İncelenen özelliklerde gene etki tipi, dar anlamda kalıtım derecesi, etkili gen sayısı ve seleksiyona karşı ilerleme değeri Nesil Ortalama Analizi (NOA) metodu ile belirlenmiştir. İncelenen özellikler bakımından kullanılan aileler ve bu ailelere ait nesiller arasında dikkate değer bir değişim saptanmıştır. Çalışma sonuçları incelenen çiçeklenme özellikleri üzerine az sayıda genin etkili olduğunu göstermiştir. Çiçeklenme özelliklerinin çoğunda eklemeli gen etkilerinin rol oynadığı bulunurken yalnızca iki ailede dominans ve epistatik interaksiyonlar önemli bulunmuştur. Gen etkilerinin önemliliği bakımından gün sayısı ve termal sure hesaplamaları arasında benzer sonuçlar elde edilmiş, fakat kalıtım derecesi tahminleri farklılık göstermiştir. Bazı ailelerin (IHOxMo17, IHPxHya, Mo17xIHO) çiçeklenme özellikleri için seleksiyon potansiyeline sahip olduğu belirlenmiştir.

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“…Pengaruh dominan tidak nyata berarti tidak terdapat pengaruh dominasi karakter umur panen pada pewarisannya, yang menunjukkan pengaruh aksi gen bersifat aditif. Hasil penelitian pada tanaman gandum (Triticum aestivum L.) (Iqbal et al 2007), jagung (Sher et al 2012), dan oats (Rosielle and Frey 2013) menunjukkan karakter umur panen dikendalikan oleh adanya pengaruh aditif dan keturunan yang diperoleh berada pada kisaran kedua induknya.…”

Section: Bahan Dan Metodeunclassified

“…Sher et al (2012) mengemukakan bahwa model aditif-dominan tidak cukup untuk menjelaskan model pola pewarisan karakter jika terdapat interaksi antarlokus yang banyak. Penelitian pada tanaman gandum (Triticum aestivum L.) menunjukkan pengaruh genetik berperan besar terhadap umur tanaman, hal ini mencerminkan adanya pengaruh gen aditif (Iqbal et al 2007).…”

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