Mass selection for improved cold and density tolerance of two maize populations

Mosely, P. R.; Crosble, T. M.; Mock, J. J.

doi:10.1007/bf00022775

Cited by 9 publications

(4 citation statements)

References 14 publications

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“…Cold tolerant genotypes at first stages of development are required for early sowing since these stages are more sensitive to low temperatures than mature stages (Greaves, 1996). Several studies have been carried out to select cold tolerant genotypes at germination in laboratory (Semuguruka et al, 1981;Lee et al, 2002;Revilla et al, 2003) and field (Mosely et al, 1984;Verheul et al 1996), but few studies included both types of evaluation (Revilla et al, 2000). Menkir and Larter (1985) pointed out that emergence related traits determined under controlled environment conditions were not correlated with those recorded in the field.…”

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confidence: 99%

Combining Maize Base Germplasm for Cold Tolerance Breeding

et al. 2007

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Early sowing increases yield and avoid stresses, but require cold tolerance. A limited number of cold tolerant maize genotypes have been reported. The objective of this study was to identify broad × narrow genetic base combinations as breeding populations for improving cold tolerance. Nine cold tolerant populations were crossed to five inbred lines, and evaluated in cold chamber and in the field. None of the maize inbred lines or populations was entirely cold tolerant. None of the inbred × population combinations fulfil all requirements for early sowings. The crosses between the inbred line EP80 and northwestern Spanish populations are the most promising base germplasm for further breeding programs for cold tolerance. Particularly, EP80 × Puenteareas showed the largest yield and good performance at first stages of development under cold conditions, either in cold chamber and field. The cross EP80 × Rebordanes had better performance at first stages of development under cold conditions, but poorer agronomic characteristics at early planting. In addition, EP80 and Puenteareas showed the most favorable GCA for most traits. Early vigor would be the most suitable trait to select maize genotypes with superior cold tolerance during emergence and post-emergence stages, as it was the only trait for which differences among genotypes were observed in both the cold chamber and the field.

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Combining Maize Base Germplasm for Cold Tolerance Breeding

et al. 2007

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“…Several authors have identified maize genotypes appropriate for cultivation under cold conditions or early field sowings (Adetimirin et al 2006;Lee et al 2002;Mosely et al 1984;Revilla et al 2000Revilla et al , 2003aSemuguruka et al 1981;Verheul et al 1996), however, cold tolerance in elite maize germplasm is partial, and favorable genes are difficult to identify (Adetimirin et al 2006;Rodriguez et al 2008). We would expect that maize from northern latitudes, such as European germplasm, would perform relatively well under cold conditions.…”

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confidence: 95%

Evaluation of European maize (Zea mays L.) germplasm under cold conditions

Rodríguez

Romay

Ordás

et al. 2010

Genet Resour Crop Evol

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Maize (Zea mays L.) is a tropical crop with low tolerance to cold conditions and has to be planted late in temperate areas due to low temperatures. The objective of this research was to identify new cold tolerant populations among the European germplasm useful for improving adaptation to early sowing. For that, the European Union Maize Landraces Core Collection (EUMLCC) was evaluated under cold conditions. After a preliminary screening of 95 populations the 11 populations with best germination and early growth under cold conditions were multiplied and evaluated in a cold chamber and in early field sowings at two locations during 2 years. The cold tolerant populations from the EUMLCC were not significantly different from the cold tolerant checks in the cold chamber. In early field sowing, some EUMLCC populations had similar emergence than the commercial checks and the coldest tolerant hybrids, and higher vigor than all the hybrids and the yield of some of the populations surpassed the yield of the cold tolerant hybrids. Altogether, Aranga1 emerged as the most promising candidate as base population for improving adaptation to early sowing.

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“…Many efforts have been dedicated to increasing cold tolerance, advancing sowing dates, and permitting cultivation of cultivars with longer cycles and higher yield (Revilla et al, 2003, 2005; Ordás et al, 2006). Mosely et al (1984) achieved an improvement of 16.6% in the rate of germination of the population BS3 in early sowing under cold conditions. Landi et al (1992) used full‐sib divergent recurrent selection based on the highest and the lowest value of germination under cold and optimum conditions, and achieved an increase in germination percentage and a reduction in days to germination in one population of maize.…”

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Maize Populations as Sources of Favorable Alleles to Improve Cold‐Tolerant Hybrids

et al. 2007

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Low spring temperatures are one of the main limiting factors for maize (Zea mays L.) growth along the European Atlantic coast. Several breeding programs have been performed to obtain cold‐tolerant maize genotypes, but the few cold‐tolerant inbreds and hybrids available need further improvements for cold tolerance and agronomic performance. The objective of this study was to identify cold‐tolerant maize populations with favorable alleles to improve cold tolerance and agronomic performance in early sowing of two cold‐tolerant hybrids. The parental inbred lines of two cold‐tolerant hybrids were crossed to nine cold‐tolerant populations. Tests were performed in a cold chamber and in the field for 2 yr at two locations. The populations Rojo de Tolosa and Puenteareas were the most promising sources of new favorable alleles for transferring cold tolerance to the hybrids EP80 × F7 and EP80 × Z78007, respectively. The populations Puenteareas and Silver King were the most outstanding donors to improve the agronomic performance of EP80 × F7 and EP80 × Z78007, respectively. Some improved versions of the cold‐tolerant inbred parents could be developed from crosses between F7 or Z78007 and Puenteareas; alternatively, Rojo de Tolosa or Silver King could be used as donors of favorable alleles, but the simultaneous improvement of yield and cold tolerance is not straightforward.

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Mass selection for improved cold and density tolerance of two maize populations

Cited by 9 publications

References 14 publications

Combining Maize Base Germplasm for Cold Tolerance Breeding

Combining Maize Base Germplasm for Cold Tolerance Breeding

Evaluation of European maize (Zea mays L.) germplasm under cold conditions

Maize Populations as Sources of Favorable Alleles to Improve Cold‐Tolerant Hybrids

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