Change in heritability estimates due to half-sib family selection in the maize variety Pahari

Noor, Muhammad; Shahwar, Durre; Rahman, Hidayat Ur; Ullah, Habib; Ali, Farhan; Iqbal, Muhammad; Shah, I. A.; Ullah, Iltaf

doi:10.4238/2013.january.16.1

Cited by 12 publications

(13 citation statements)

References 27 publications

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“…Our results showed that individual plant selection may be practiced in early generations of abovementioned families (Table 4). Narrow sense heritability estimations in our study are in consistence with the results of other studies (Noor et al 2013). Nevertheless, our heritability values for flowering traits are higher than those in some other studies (Dawod et al 2012;Lopes et al 1995).…”

Section: Resultssupporting

confidence: 92%

“…Based on our estimations, it is possible to obtain genetic gain from Families 1, 4 and 5 for days to silking, and from Families 4 and 5 for ASI (Table 4). These estimations are consistent with the results of Noor et al (2013), who determined the realized genetic gain in different flowering traits. However, our estimations are theoretical values and the previously mentioned families should be tested for more accurate results prior to selection experiments.…”

Section: Resultssupporting

confidence: 91%

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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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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 91%

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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show abstract

“…Reciprocal recurrent selection has been very effective in improving interpopulation crosses Eyherabide and Hallauer, 1991;Rezende and Souza, 2000;Souza and Pinto, 2000;Santos et al, 2005;da Cunha et al, 2012) and inbred lines and hybrids (Moll et al, 1977;Russell, 1985;Betrán and Hallauer, 1996). Noor et al (2013) also reported that two cycles of half-sib RRS increased grain yield by 5.1% cycle −1 . Previous estimates of genetic gains in grain yield per cycle resulting from different RRS methods range from 3.0 to 7.3% in different maize populations (Souza and Pinto, 2000;Santos et al, 2005;Hallauer and Carena, 2012).…”

Section: Genetic Advance In Grain Yield and Other Traits In Two Tropimentioning

confidence: 93%

“…Peña-Asin et al (2013) reported a 3.0% cycle −1 increase in grain yield after three cycles of full-sib RRS in two maize composites. Noor et al (2013) also reported that two cycles of half-sib RRS increased grain yield by 5.1% cycle −1 . These results indicate that the different RRS methods have been effective in improving performance in maize populations.…”

Section: Genetic Advance In Grain Yield and Other Traits In Two Tropimentioning

confidence: 93%

Genetic Advance in Grain Yield and Other Traits in Two Tropical Maize Composites Developed via Reciprocal Recurrent Selection

et al. 2018

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Assessment of genetic gain in two tropical maize (Zea mays L.) composites improved across years is critical in determining their future improvement and use as sources of inbred lines. Two genetically complementary tropical maize composites were subjected to four cycles of reciprocal recurrent selection (RRS) for grain yield, resistance to foliar diseases, and other desirable agronomic traits using a reciprocal S1 testcross evaluation scheme. The objectives of this study were to evaluate the effects of this selection scheme on: (i) the rate of genetic gain in grain yield and other traits, (ii) the changes in variance and heritability estimates, and (iii) changes in correlations between grain yield and other traits in the two tropical maize composites. One hundred S1 lines, each derived from the original (C0) and advanced (C4) cycles of the two composites, were crossed in pairs to form 100 C0 × C0 and 100 C4 × C4 testcrosses, which were evaluated along with 10 commercial hybrid checks in a replicated trial across eight environments in Nigeria. The observed genetic gain was 3.60% cycle−1 for grain yield. On average, the top 10 C4 × C4 testcrosses outyielded the commercial hybrids by 29% and had desirable agronomic traits and improved resistance to foliar diseases. The genetic variance estimates for C0 and C4 of each composite were significantly larger than zero for most traits. These results indicated that the RRS was effective in improving grain yield and other desirable agronomic traits without diminishing genetic variability that can be exploited for further improvement of the two tropical maize composites.

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“…Karakter yang memiliki nilai heritabilitas arti luas kategori sedang pada generasi S 1 dan S 2 adalah umur berbunga jantan, umur berbunga betina, dan kadar air (Tabel 3). Hal ini didukung oleh penelitian Noor et al (2013) yang menyatakan bahwa heritabilitas umur berbunga jantan pada jagung termasuk kategori sedang. Sadras dan Slafer (2012) menyatakan bahwa heritabilitas yang rendah dapat disebabkan karena pengaruh lingkungan yang besar.…”

Section: Pendugaan Komponen Ragam Dan Heritabilitas Arti Luasunclassified

Keragaan Agronomi dan Potensi Hasil Genotipe Jagung (Zea mays L.) Generasi S1 dan S2 di Dua Lokasi

Salamah

Suwarno²,

Aswidinnoor³

et al. 2017

J Agron Indonesia

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Wellin, 2009). Peningkatan produksi menjadi sangat penting untuk memenuhi kebutuhan pangan di masa depan, dimana kompetisi semakin kuat dan sumber daya semakin terbatas (Meng et al., 2013). Produksi jagung yang tidak optimum dapat disebabkan oleh cekaman abiotik, serangan hama dan penyakit, serta penggunaan varietas yang kurang sesuai dengan lingkungan tumbuhnya.Pemuliaan tanaman konvensional masih memiliki peran besar dalam pengembangan kultivar (Campos et al., 2004). Metode yang digunakan dalam program pemuliaan

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Change in heritability estimates due to half-sib family selection in the maize variety Pahari

Cited by 12 publications

References 27 publications

Mısırda Çiçeklenmenin Gün ve Termal Süreye Göre Genetik Analizi

Mısırda Çiçeklenmenin Gün ve Termal Süreye Göre Genetik Analizi

Genetic Advance in Grain Yield and Other Traits in Two Tropical Maize Composites Developed via Reciprocal Recurrent Selection

Keragaan Agronomi dan Potensi Hasil Genotipe Jagung (Zea mays L.) Generasi S1 dan S2 di Dua Lokasi

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