Resistance to Karnal Bunt (Tilletia indica Mitra) in Synthetic Hexaploid Wheats Derived from Triticum turgidum×T. tauschii

Villareal, R. L.; Mujeeb‐Kazi, A.; Fuentes-Dávila, Guillermo; Rajaram, S.; Toro, E. Del

doi:10.1111/j.1439-0523.1994.tb01277.x

Cited by 40 publications

(23 citation statements)

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“…This study supports others suggesting that synthetic derived lines offer new genetic variation in morphological, physiological and agronomic traits, in resistance to both biotic and abiotic stresses, and in potential improvements in grain size (Villareal et al 1994a(Villareal et al , 1994bMujeeb-Kazi et al 2004;Ogbonnaya et al 2007;Ortiz et al 2007;Dreccer et al 2008;Rattey et al 2011). Genotypic analysis in this study confirms that DNA marker analysis of SDLs and their corresponding SHW and elite BW parents can be used to identify markers and chromosomal regions that appear to be preferentially retained and associated with useful traits; such regions may confer a selective advantage for exploitation in breeding programs to help increase the rate of genetic improvement for bread wheat.…”

Section: Discussionsupporting

confidence: 73%

“…Previous studies have demonstrated useful variation in SHWs for morphological and agronomic traits (Villareal et al 1994a(Villareal et al , 1994bLage et al 2006;Dreccer et al 2008) such as anthesis date, height and grain weight, as well as in biotic and abiotic-stress related traits. In this study, we observed that the SDLs, in general, tended to be earlier flowering, taller, with large grain size and varied yields compared with their elite parental lines.…”

Section: Discussionmentioning

confidence: 99%

“…As SHWs frequently carry unfavourable alleles and are agronomically poorly adapted, they are typically crossed and then back-or top-crossed to elite BWs to produce more agronomically acceptable synthetic derived lines (SDLs). Evaluation of SHWs and SDLs has revealed extensive new variation in morphological, physiological and agronomic traits (Villareal et al 1994a(Villareal et al , 1994bOrtiz et al 2007;Dreccer et al 2008;Rattey and Shorter 2010;Rattey et al 2011), in milling and baking quality traits (Kunert et al 2007), and in resistance to both biotic (Mujeeb-Kazi et al 2004;Ogbannaya et al 2008;Zwart et al 2010;Mulki et al 2013) and abiotic stresses (Ogbonnaya et al 2007;Rattey and Shorter 2010;De Leon et al 2011;Ghaffary et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

McIntyre

Rattey

Kilian³

et al. 2014

Crop Pasture Sci.

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Abstract. Synthetic hexaploid wheats (SHWs) and their synthetic derivative lines (SDLs) are being used as a means of introducing novel genetic variation into bread wheat (BW). Phenotypic information for days to flowering, height, grain weight and grain yield was collected from multiple environments for three SDL families, each with~50 lines, and their elite BW parents. In general, the SDLs were earlier flowering and taller with larger grain size, but similar grain yield to the BWs. The three SDL families and their SHW and BW parents were genotyped using mapped DArT (diversity arrays technology) markers. Within each SDL family, SHW-specific DArT markers were used to identify SHW-derived chromosomal regions that appeared to be preferentially retained in the SDL families, as determined by retention at frequencies >0.25, the expected frequency for Mendelian segregation. Regions on chromosomes 2BS and 7BL appeared to be preferentially retained in all three SDL families, while regions on chromosomes 1AL, 1BS, 3BS, 5AS, 5BL, and 7AS were preferentially retained in two of the three SDL families. Other regions were preferentially retained in single families only, including some regions located on the D genome. Single-marker regression analysis was performed using the preferentially retained markers and identified markers and regions that were significantly associated with one or more of the four traits measured. Comparative mapping also indicates that these preferentially retained markers and chromosome regions may co-locate with previously identified QTLs for anthesis, height, grain weight and/or grain yield. Therefore, SHWs may contain novel alleles at these loci in these regions for these traits, which may provide a selective advantage to the SDLs. This approach could provide a useful method for identifying chromosomal regions of interest with potentially novel alleles for introgression for further BW improvement.

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Section: Discussionsupporting

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

McIntyre

Rattey

Kilian³

et al. 2014

Crop Pasture Sci.

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“…Rest of the plants were found to have statistically at par values with KSC-5-3 ( Table 2). Similar observations were found in wheat [32] and Mentha sps. [27].…”

Section: Average Number Of Leaves Per Plantsupporting

confidence: 75%

Morphological Diversity and Nomenclature of Swertia chirayita (Gentianaceae)—Recovery of Endangered Medicinal Plant Population in North Eastern Himalaya

Chakraborty¹,

Mukherjee²,

Baskey³

2016

AJPS

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Swertia chirayita is a highly endangered and very well known medicinal plant enlisted in the IUCN list of endangered plants in the world. The plant is currently having a very low population in eastern Himalayan region due to its very low germinability in its own natural habitat. The plant population was found to have a range of diversity in morphological observations and some of the morphovariants were found to be very low among the variant populations which created a concern due to its diminishing range of genetic base in this region. A basic group of 5 morphovariants and 24 sub variants were identified and separately maintained. It is a pluriannual plant and reproductive or flowering stage was observed after completion of two years of vegetative stage from the time of seed germination. A range of morphovariant diversity was observed in the populations of Neora Valley and Lava region of eastern Himalaya in our investigation. Diversity was critically observed in some of the parameters of different morphovariants in the population. Conservation practices were generally done by not making groups or sub groups of this endangered plant while we proposed the way of conservation by making groups for proper conservation of this vulnerable plant.

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“…Other work comparing synthetic hexaploids with normal hexaploids has found improved properties in the synthetics (Genc and McDonald 2004;Zwart et al 2004). Previous work on synthetic wheats and their possible parents has focused on protein composition and quality (Lagudah et al 1987;Pena et al 1995), agronomic factors (Rafi et al 1992;Villareal et al 1994a) and disease resistance (Villareal et al 1994b;Ma et al 1995). Resistance to Karnal bunt disease was introduced into hexaploid wheats following selection of resistant diploid and tetraploid parents (Villareal et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Starch characterisation and variability in GBSS loci of synthetic hexaploid wheats and their durum and Aegilops tauschii parents

et al. 2008

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Greater variability in starch properties is found in lower ploidy wheats than in commercial hexaploid wheats. This paper reports on the starch properties and variability in granule bound starch synthase (GBSS) loci of 17 diploid (Aegilops tauschii) and 12 tetraploid (durums) potential progenitors of wheat, compared with 29 synthetic hexaploid wheats produced from such progenitors. Starch properties examined were granule size distribution, swelling power, amylose content, gelatinisation and amyloselipid dissociation properties. A PCR screening method was able to detect the presence or absence of each of the three GBSS genes. It also detected polymorphisms in eight diploids and nine hexaploids, all displaying the same 25 bases deletion in the D genome allele of GBSS. Two tetraploids and five hexaploids were null 4A for GBSS. There was little difference in the amylose contents and amylose-lipid dissociation peak temperatures of the synthetic hexaploids and the lower ploidy wheats. The synthetic hexaploids showed intermediate swelling power values with the durums giving the highest swelling powers. The durums also had higher B granule contents than the A. tauschii accessions, but not as high as the synthetics. However, the A. tauschii samples gave the highest gelatinisation peak temperatures. The presence of the null 4A mutation was positively correlated with swelling power, amylose content and DSC measurements. The new smaller D genome allele of GBSS was associated Electronic supplementary material The online version of this article (with slightly higher swelling power. These results confirm the value of wheat progenitor lines as sources of new starch properties for hexaploid wheat.

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Resistance to Karnal Bunt (Tilletia indica Mitra) in Synthetic Hexaploid Wheats Derived from Triticum turgidum×T. tauschii

Cited by 40 publications

References 7 publications

Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

Morphological Diversity and Nomenclature of <i>Swertia chirayita</i> (Gentianaceae)—Recovery of Endangered Medicinal Plant Population in North Eastern Himalaya

Starch characterisation and variability in GBSS loci of synthetic hexaploid wheats and their durum and Aegilops tauschii parents

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Resistance to Karnal Bunt (Tilletia indica Mitra) in Synthetic Hexaploid Wheats Derived from Triticum turgidum×T. tauschii

Cited by 40 publications

References 7 publications

Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

Preferential retention of chromosome regions in derived synthetic wheat lines: a source of novel alleles for wheat improvement

Morphological Diversity and Nomenclature of &lt;i&gt;Swertia chirayita&lt;/i&gt; (Gentianaceae)—Recovery of Endangered Medicinal Plant Population in North Eastern Himalaya

Starch characterisation and variability in GBSS loci of synthetic hexaploid wheats and their durum and Aegilops tauschii parents

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Morphological Diversity and Nomenclature of <i>Swertia chirayita</i> (Gentianaceae)—Recovery of Endangered Medicinal Plant Population in North Eastern Himalaya